Yamaha F25 User Manual To The F076dbfd 53a5 408e Af53 5936ffeb8631

User Manual: Yamaha F25 to the manual

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Table of contents

Printed in Japan

February 2009–0.8 ×1 !Printed on recycled paper

F25

T25

OWNER’S MANUAL

6BP-28199-11

U.S.A.Edition

LIT-18626-08-49

qRead this manual carefully before operating this

outboard motor.

6BP-9-11 Hyoshi 背巾4mm 09.2.19 9:09 ページ 1

EMU25062

ZMU01690

Read this manual carefully before operating this outboard motor. Keep this

manual onboard in a waterproof bag when boating. This manual should stay

with the outboard motor if it is sold.

6BP-9-11 Hyoshi 背巾4mm 09.2.19 9:09 ページ 2

Important manual information

EMU31283

To the owner

Thank you for choosing a Yamaha outboard

motor. This Owner’s Manual contains infor-

mation needed for proper operation, mainte-

nance and care. A thorough understanding

of these simple instructions will help you ob-

tain maximum enjoyment from your new

Yamaha. If you have any question about the

operation or maintenance of your outboard

motor, please consult a Yamaha dealer.

In this Owner’s Manual particularly important

information is distinguished in the following

ways.

: This is the safety alert symbol. It is

used to alert you to potential personal injury

hazards. Obey all safety messages that fol-

low this symbol to avoid possible injury or

death.

WARNING

EWM00781

A WARNING indicates a hazardous situa-

tion which, if not avoided, could result in

death or serious injury.

NOTICE

ECM00701

A NOTICE indicates special precautions

that must be taken to avoid damage to the

outboard motor or other property.

IP:

A TIP provides key information to make pro-

cedures easier or clearer.

Yamaha continually seeks advancements in

product design and quality. Therefore, while

this manual contains the most current prod-

uct information available at the time of print-

ing, there may be minor discrepancies

between your machine and this manual. If

there is any question concerning this manu-

al, please consult your Yamaha dealer.

IP:

The F25A, F25EA, F25EHA, F25MHA, T25A

and the standard accessories are used as a

base for the explanations and illustrations in

this manual. Therefore some items may not

apply to every model.

EMU25111

F25, T25

OWNER’S MANUAL

1st edition, February 2009

Any reprinting or unauthorized use

without the written permission of

Yamaha Motor Corporation, USA

is expressly prohibited.

Printed in Japan

P/N LIT-18626-08-49

Table of contents

Safety information.............................1

Outboard motor safety .................... 1

Propeller............................................ 1

Rotating parts.................................... 1

Hot parts ........................................... 1

Electric shock.................................... 1

Power trim and tilt ............................. 1

Engine shut-off cord (lanyard)........... 1

Gasoline............................................ 1

Gasoline exposure and spills ............ 2

Carbon monoxide.............................. 2

Modifications ..................................... 2

Boating safety ................................. 2

Alcohol and drugs ............................. 2

Personal flotation devices ................. 2

People in the water ........................... 2

Passengers ....................................... 2

Overloading....................................... 2

Avoid collisions ................................. 3

Weather ............................................ 3

Accident reporting ............................. 3

Boat education and training .............. 3

Passenger training ............................ 4

Boating safety publications ............... 4

Laws and regulations ........................ 4

Boating organizations...................... 4

Basic boating rules

(Rules of the road) ........................ 4

Steering and sailing rules and

sound signals.................................. 5

Rules when encountering vessels .... 5

Other special situations..................... 6

General information .......................... 9

Identification numbers record.......... 9

Outboard motor serial number .......... 9

Key number....................................... 9

Read manuals and labels.............. 10

Warning labels ................................ 10

Specifications and requirements... 14

Specifications ................................ 14

Installation requirements ............... 16

Boat horsepower rating................... 16

Mounting motor ............................... 16

Remote control requirements........ 16

Battery requirements..................... 16

Specifications of Battery.................. 16

Mounting battery .............................17

Multiple batteries ............................. 17

Without a rectifier or Rectifier

Regulator ...................................... 17

Propeller selection ........................ 17

Start-in-gear protection ................. 18

Engine oil requirements ................ 18

Fuel requirements......................... 18

Gasoline .......................................... 18

Ring Free Fuel Additive................... 19

Muddy or acidic water................... 19

Anti-fouling paint ........................... 19

Motor disposal requirements......... 20

Emergency equipment.................. 20

Emission control information......... 20

North American models................... 20

Star labels ....................................... 21

Components .................................... 23

Components diagram.................... 23

Fuel tank .........................................24

Fuel joint.......................................... 25

Fuel gauge ...................................... 25

Fuel tank cap................................... 25

Air vent screw.................................. 25

Remote control box ......................... 25

Remote control lever ....................... 25

Neutral interlock trigger ................... 26

Neutral throttle lever........................ 26

Tiller handle..................................... 26

Gear shift lever................................ 26

Throttle grip ..................................... 27

Throttle indicator .............................27

Throttle friction adjuster................... 28

Engine shut-off cord (lanyard)

and clip..........................................28

Engine stop button .......................... 29

Manual starter handle .....................29

Starter button ..................................30

Main switch .....................................30

Steering friction adjuster .................30

Power trim and tilt switch on

remote control or tiller handle .......31

Power trim and tilt switch on

bottom engine cowling .................. 31

Table of contents

Trim tab with anode ........................ 32

Trim tab........................................... 32

Trim rod (tilt pin).............................. 33

Tilt lock mechanism......................... 33

Tilt support knob ............................. 33

Tilt support bar ................................ 34

Cowling lock lever(s) (turn type)...... 34

Flushing device ............................... 34

Alert indicator .................................. 34

Instruments and indicators ............ 36

Indicators....................................... 36

Low oil pressure-alert indicator ....... 36

Overheat-alert indicator .................. 36

Engine control system.................... 37

Alert system .................................. 37

Overheat alert ................................. 37

Low oil pressure alert...................... 37

Installation ....................................... 39

Installation ..................................... 39

Mounting the outboard motor.......... 39

Clamping the outboard motor ......... 40

Operation ......................................... 42

First-time operation ....................... 42

Fill engine oil ................................... 42

Breaking in engine .......................... 42

Getting to know your boat ............... 42

Checks before starting engine ...... 42

Fuel level......................................... 42

Remove cowling.............................. 43

Fuel system..................................... 43

Controls........................................... 43

Engine shut-off cord (lanyard)......... 44

Engine oil ........................................ 45

Engine............................................. 45

Flushing device ............................... 45

Install cowling.................................. 45

Checking power trim and tilt

system .......................................... 46

Battery............................................. 46

Filling fuel ...................................... 46

Operating engine........................... 47

Sending fuel (portable tank)............ 47

Starting engine................................ 49

Checks after starting engine ......... 55

Cooling water .................................. 55

Warming up engine....................... 55

Manual start and electric start

models .......................................... 55

Checks after engine warm-up....... 55

Shifting ............................................ 55

Stop switches .................................. 56

Shifting.......................................... 56

Stopping boat................................ 58

Stopping engine............................ 58

Procedure........................................ 58

Trimming outboard motor.............. 59

Adjusting trim angle for manual tilt

models .......................................... 59

Adjusting trim angle

(Power trim and tilt)....................... 60

Adjusting boat trim ..........................61

Tilting up and down....................... 62

Procedure for tilting up

(manual tilt models).......................62

Procedure for tilting up

(power trim and tilt models)........... 63

Procedure for tilting down

(manual tilt models).......................65

Procedure for tilting down

(power trim and tilt models)........... 65

Shallow water................................ 66

Cruising in shallow water

(manual tilt models).......................66

Power trim and tilt models............... 67

Cruising in other conditions........... 68

Maintenance .................................... 69

Transporting and storing outboard

motor ........................................... 69

Clamp screw mounting models ....... 69

Storing outboard motor ...................69

Procedure........................................ 70

Lubrication....................................... 71

Cleaning and anticorrosion

measures ...................................... 71

Flushing power unit ......................... 71

Cleaning the outboard motor........... 72

Checking painted surface of

motor............................................. 72

Periodic maintenance ................... 72

Table of contents

Replacement parts.......................... 73

Maintenance interval guidelines...... 73

Maintenance chart 1 ....................... 74

Maintenance chart 2 ....................... 76

Greasing ......................................... 77

Cleaning and adjusting spark

plug ............................................... 78

Checking fuel filter .......................... 79

Inspecting idling speed ................... 79

Changing engine oil ........................ 80

Checking wiring and connectors ..... 82

Checking propeller .......................... 82

Removing propeller......................... 82

Installing propeller........................... 83

Changing gear oil............................ 84

Cleaning fuel tank ........................... 85

Inspecting and replacing

anode(s)........................................ 86

Checking battery

(for electric start models) .............. 86

Connecting the battery.................... 87

Disconnecting the battery ............... 87

Trouble Recovery............................ 89

Troubleshooting ............................ 89

Temporary action in emergency.... 92

Impact damage ............................... 92

Replacing fuse ................................ 92

Power trim and tilt will not

operate.......................................... 93

Starter will not operate .................... 93

Emergency starting engine

(manual start model)..................... 94

Emergency starting engine

(electric start model) ..................... 96

Treatment of submerged motor..... 97

Consumer information....................98

YAMAHA MOTOR

CORPORATION, U.S.A.

FOUR-STROKE OUTBOARD

MOTOR

THREE-YEAR LIMITED

WARRANTY ................................ 98

IMPORTANT WARRANTY

INFORMATION IF YOU USE

YOUR YAMAHA OUTSIDE

THE USA OR CANADA............ 100

Safety information

EMU33622

Outboard motor safety

Observe these precautions at all times.

EMU36501

Propeller

People can be injured or killed if they come

in contact with the propeller. The propeller

can keep moving even when the motor is in

neutral, and sharp edges of the propeller can

cut even when stationary.

●

Stop the engine when a person is in the

water near you.

●

Keep people out of reach of the propeller,

even when the engine is off.

EMU33630

Rotating parts

Hands, feet, hair, jewelry, clothing, PFD

straps, etc. can become entangled with inter-

nal rotating parts of the engine, resulting in

serious injury or death.

Keep the top cowling in place whenever pos-

sible. Do not remove or replace the cowling

with the engine running.

Only operate the engine with the cowling re-

moved according to the specific instructions

in the manual. Keep hands, feet, hair, jewel-

ry, clothing, PFD straps, etc. away from any

exposed moving parts.

EMU33640

Hot parts

During and after operation, engine parts are

hot enough to cause burns. Avoid touching

any parts under the top cowling until the en-

gine has cooled.

EMU33650

Electric shock

Do not touch any electrical parts while start-

ing or operating the engine. They can cause

shock or electrocution.

EMU33660

Power trim and tilt

Body parts can be crushed between the mo-

tor and the clamp bracket when the motor is

trimmed or tilted. Keep body parts out of this

area at all times. Be sure no one is in this

area before operating the power trim and tilt

mechanism.

The power trim and tilt switches operate

even when the main switch is off. Keep peo-

ple be away from the switches whenever

working around the motor.

Never get under the lower unit while it is tilt-

ed, even when the tilt support lever is locked.

Severe injury could occur if the outboard mo-

tor accidentally falls.

EMU33671

Engine shut-off cord (lanyard)

Attach the engine shut-off cord so that the

engine stops if the operator falls overboard

or leaves the helm. This prevents the boat

from running away under power and leaving

people stranded, or running over people or

objects.

Always attach the engine shut-off cord to a

secure place on your clothing or your arm or

leg while operating. Do not remove it to leave

the helm while the boat is moving. Do not at-

tach the cord to clothing that could tear

loose, or route the cord where it could be-

come entangled, preventing it from function-

ing.

Do not route the cord where it is likely to be

accidentally pulled out. If the cord is pulled

during operation, the engine will shut off and

you will lose most steering control. The boat

could slow rapidly, throwing people and ob-

jects forward.

EMU33810

Gasoline

Gasoline and its vapors are highly flam-

mable and explosive.

Always, refuel ac-

cording to the procedure on page 47 to

reduce the risk of fire and explosion.

Safety information

EMU33820

Gasoline exposure and spills

Take care not to spill gasoline. If gasoline

spills, wipe it up immediately with dry rags.

Dispose of rags properly.

If any gasoline spills onto your skin, immedi-

ately wash with soap and water. Change

clothing if gasoline spills on it.

If you swallow gasoline, inhale a lot of gaso-

line vapor, or get gasoline in your eyes, get

immediate medical attention. Never siphon

fuel by mouth.

EMU33900

Carbon monoxide

This product emits exhaust gases which

contain carbon monoxide, a colorless, odor-

less gas which may cause brain damage or

death when inhaled. Symptoms include nau-

sea, dizziness, and drowsiness. Keep cock-

pit and cabin areas well ventilated. Avoid

blocking exhaust outlets.

EMU33780

Modifications

Do not attempt to modify this outboard mo-

tor. Modifications to your outboard motor

may reduce safety and reliability, and render

the outboard unsafe or illegal to use.

EMU33740

Boating safety

This section includes a few of the many im-

portant safety precautions that you should

follow when boating.

EMU33710

Alcohol and drugs

Never operate after drinking alcohol or tak-

ing drugs. Intoxication is one of the most

common factors contributing to boating fatal-

ities.

EMU33720

Personal flotation devices

Have an approved personal flotation device

(PFD) on board for every occupant. Yamaha

recommends that you must wear a PFD

whenever boating. At a minimum, children

and non-swimmers should always wear

PFDs, and everyone should wear PFDs

when there are potentially hazardous boat-

ing conditions.

EMU33731

People in the water

Always watch carefully for people in the wa-

ter, such as swimmers, skiers, or divers,

whenever the engine is running. When

someone is in the water near the boat, shift

into neutral and stop the engine.

Stay away from swimming areas. Swimmers

can be hard to see.

The propeller can keep moving even when

the motor is in neutral. Stop the engine when

a person is in the water near you.

EMU33751

Passengers

Consult your boat manufacturer’s instruc-

tions for details about appropriate passenger

locations in your boat and be sure all pas-

sengers are positioned properly before ac-

celerating and when operating above an idle

speed. Standing or sitting in non-designated

locations may result in being thrown either

overboard or within the boat due to waves,

wakes, or sudden changes in speed or direc-

tion. Even when people are positioned prop-

erly, alert your passengers if you must make

any unusual maneuver. Always avoid jump-

ing waves or wakes.

EMU33760

Overloading

Do not overload the boat. Consult the boat

capacity plate or boat manufacturer for max-

imum weight and number of passengers. Be

sure that weight is properly distributed ac-

cording to the boat manufacturers instruc-

tions. Overloading or incorrect weight

distribution can compromise the boats han-

Safety information

dling and lead to an accident, capsizing or

swamping.

EMU33772

Avoid collisions

Scan constantly for people, objects, and oth-

er boats. Be alert for conditions that limit your

visibility or block your vision of others.

Operate defensively at safe speeds and

keep a safe distance away from people, ob-

jects, and other boats.

●

Do not follow directly behind other boats or

waterskiers.

●

Avoid sharp turns or other maneuvers that

make it hard for others to avoid you or un-

derstand where you are going.

●

Avoid areas with submerged objects or

shallow water.

●

Ride within your limits and avoid aggres-

sive maneuvers to reduce the risk of loss

of control, ejection, and collision.

●

Take early action to avoid collisions. Re-

member, boats do not have brakes, and

stopping the engine or reducing throttle

can reduce the ability to steer. If you are

not sure that you can stop in time before

hitting an obstacle, apply throttle and turn

in another direction.

EMU33790

Weather

Stay informed about the weather. Check

weather forecasts before boating. Avoid

boating in hazardous weather.

EMU33800

Accident reporting

Boat operators are required by law to file a

Boating Accident Report with their state

boating law enforcement agency if their boat

is involved in any of the following accidents:

1. There is loss of life or probable loss of

life.

2. There is personal injury that requires

medical attention beyond first aid.

3. There is property damage to boats or

other property over a certain amount.

4. There is complete loss of a boat.

Contact local law enforcement personnel if a

report is necessary.

EMU33870

Boat education and training

Operators should take a boating safety

course. This may be required in your state.

Many of the organizations listed in the next

section can provide information about cours-

es in your area.

You may also want to consider an Internet-

based program for basic boater education.

The Online Boating Safety Course provided

by the BoatU.S. Foundation, is approved by

the National Association of State Boating

Law Administrators (NASBLA) and recog-

nized by the United States Coast Guard.

Most, but not all, states accept this course to

meet their minimum requirements. While it

cannot replace an in-depth course such as

one offered by the U.S. Coast Guard, U.S.

Power Squadron, or other organization, this

online course does provide a general over-

view of the basics in boating safety, require-

ments, navigation, and operation. Upon

successful completion of the course, the

user can download a certificate of comple-

tion immediately or, for a small charge, re-

quest one by mail. To take this free course,

ZMU06025

Safety information

go to boatus.org.

EMU33880

Passenger training

Make sure at least one other passenger is

trained to operate the boat in the event of an

emergency.

EMU33890

Boating safety publications

Be informed about boating safety. Additional

publications and information can be obtained

from many boating organizations.

EMU33590

Laws and regulations

Know the marine laws and regulations where

you will be boating- and obey them. Several

sets of rules prevail according to geographic

location, but all are basically the same as the

International Rules of the Road. The rules

presented in the following section are con-

densed- and have been provided for your

convenience only.

Contact the U.S. Coast Guard, the National

Association of State Boating Law Adminis-

trators, or your local Power Squadron for a

complete set of rules governing the waters in

which you will be using your boat.

EMU33681

Boating organizations

The following organizations provide boating

safety training and information about boating

safety and laws.

United States Coast Guard

Consumer Affairs Staff (G-BC)

Office of Boating, Public, and Consumer Af-

fairs

U.S. Coast Guard Headquarters

Washington, D.C. 20593-0001

Boating Safety Hotline: 1-800-368-5647

www.uscgboating.org

United States Power Squadrons

1-888-FOR-USPS (1-888-367-8777)

www.usps.org

Boat Owners Association of The United

States

1-800-336-BOAT (1-800-336-2628)

www.boatus.com

National Association of State Boating

Law Administrators (NASBLA)

1500 Leestown Road, Suite 330

Lexington, KY 40511 859-225-9497

www.nasbla.org

National Marine Manufacturers Associa-

tion (NMMA)

200 East Randolph Drive

Suite 5100

Chicago, IL 60601

www.nmma.org

Marine Retailers Association of America

155 N. Michigan Ave. Chicago,

IL 60304

www.mraa.com

EMU33690

Basic boating rules (Rules of

the road)

Just as there are rules that apply when you

are driving on streets and highways, there

are waterway rules that apply when you are

driving your boat. These rules are used inter-

nationally. (For USA: and are also enforced

by the United States Coast Guard and local

agencies.) You should be aware of these

rules, and follow them whenever you en-

counter another vessel on the water.

Safety information

EMU33700

Steering and sailing rules and sound

signals

Whenever two vessels on the water meet

one another, one vessel has the right-of-

way; it is called the “stand-on” vessel. The

vessel that does not have the right-of-way is

called the “give-way” or “burdened”vessel.

These rules determine which vessel has the

right-of-way, and what each vessel should

do.

Stand-on vessel

The vessel with the right-of-way has the duty

to continue its course and speed, except to

avoid an immediate collision. When you

maintain your direction and speed, the other

vessel will be able to determine how best to

avoid you.

Give-way vessel

The vessel that does not have the right-of-

way has the duty to take positive and timely

action to stay out of the way of the Stand-On

vessel. Normally, you should not cross in

front of the vessel with the right-of-way. You

should slow down or change directions brief-

ly and pass behind the other vessel. You

should always move in such a way that the

operator of the other vessel can see what

you are doing.

“ The general prudential rule ”

This rule is called Rule 2 in the International

Rules and says,

“ In obeying and construing these rules due

regard shall be had to all dangers of naviga-

tion and collision, and to any special circum-

stances, which may render a departure from

the above rules necessary in order to avoid

immediate danger.”

In other words, follow the standard rules ex-

cept when a collision will occur unless both

vessels try to avoid each other. If that is the

case, both vessels become “ Give-Way ”

vessels.

EMU25521

Rules when encountering vessels

There are three main situations that you may

encounter with other vessels which could

lead to a collision unless the Steering Rules

are followed:

Meeting:

(you are approaching another ves-

sel head-on)

Crossing:

(you are traveling across the oth-

er vessel’s path)

Overtaking:

(you are passing or being

passed by another vessel)

In the following illustration, your boat is in the

center. You should give the right-of-way to

any vessels shown in white area (you are the

Give-Way vessel). Any vessels in the shad-

ed area must yield to you (they are the Give-

Way vessels). Both you and the meeting

vessel must alter course to avoid each other.

Meeting

If you are meeting another power vessel

head on, and are close enough to run the risk

of collision, neither of you has the right-of-

way Both of you should alter course to avoid

an accident. You should keep the other ves-

sel on your port (left) side. This rule doesn’t

apply if both of you will clear one another if

you continue on your set course and speed.

Safety information

Crossing

When two power driven vessels are crossing

each other’s path close enough to run the

risk of collision, the vessel which has the oth-

er on the starboard (right) side must keep out

of the way of the other. If the other vessel is

on your right, you must keep out of its way;

you are the Give-Way vessel. If the other

vessel is on your port (left) side, remember

that you should maintain course and direc-

tion, provided the other vessel gives you the

right-of-way as it should.

Overtaking

If you are passing another vessel, you are

the “Give-Way” vessel. This means that the

other vessel is expected to maintain its

course and speed. You must stay out of its

way until you are clear of it. Likewise, if an-

other vessel is passing you, you should

maintain your speed and direction so that the

other vessel can steer itself around you.

EMU25531

Other special situations

There are three other rules you should be

aware of when driving your boat around oth-

er vessels.

Narrow channels and bends

When navigating in narrow channels, you

should keep to the right when it is safe and

practical to do so. If the operator of a power-

driven vessel is preparing to go around a

bend that may obstruct the view of other wa-

ter vessels, the operator should sound a pro-

longed blast on the whistle (4 to 6 seconds).

If another vessel is around the bend, it too

should sound the whistle. Even if no reply is

heard, however, the vessel should still pro-

ceed around the bend with caution. If you

navigate such waters with your boat, you will

need to carry a portable air horn, available

from local marine supply stores.

Fishing vessel right-of-way

All vessels that are fishing with nets, lines or

trawls are considered to be “fishing vessels”

under the International Rules. Vessels with

trolling lines are not considered fishing ves-

sels. Fishing vessels have the right-of-way

regardless of position. Fishing vessels can-

not, however, impede the passage of other

vessels in narrow channels.

Sailing vessel right-of-way

Sailing vessels should normally be given the

right-of-way. The exceptions to this are:

1. When the sailing vessel is overtaking

the power-driven vessel, the power-driv-

en vessel has the right-of-way.

2. Sailing vessels should keep clear of any

fishing vessel.

3. In a narrow channel, a sailing vessel

should not hamper the safe passage of

a power-driven vessel that can navigate

only in such a channel.

Safety information

Reading buoys and other markers

The waters of the United States are marked

for safe navigation by the lateral system of

buoyage. Simply put, buoys and markers

have an arrangement of shapes, colors,

numbers and lights to show which side of the

buoy a boater should pass on when navigat-

ing in a particular direction. The markings on

these buoys are oriented from the perspec-

tive of being entered from seaward (the boat-

er is going towards the port). This means that

red buoys are passed on the starboard

(right) side when proceeding from open wa-

ter into port, and black buoys are to port (left)

side. When navigating out of port, your posi-

tion with respect to the buoys should be re-

versed; red buoys should be to port and

black buoys to starboard.

Many bodies of water used by boaters are

entirely within the boundaries of a particular

state. The Uniform State Waterway Marking

System has been devised for these waters.

This system uses buoys and signs with dis-

tinctive shapes and colors to show regulato-

ry or advisory information. These markers

are white with black letters and orange

boarders. They signify speed zones, restrict-

ed areas, danger areas, and general infor-

mation.

Remember, markings may vary by geo-

graphic location. Always consult local boat-

ing authorities before driving your boat in

unfamiliar waters.

Safety information

ZMU01708

General information

EMU25171

Identification numbers record

EMU25183

Outboard motor serial number

The outboard motor serial number is

stamped on the label attached to the port

side of the clamp bracket.

Record your outboard motor serial number in

the spaces provided to assist you in ordering

spare parts from your Yamaha dealer or for

reference in case your outboard motor is sto-

len.

EMU25190

Key number

If a main key switch is equipped with the mo-

tor, the key identification number is stamped

on your key as shown in the illustration.

Record this number in the space provided for

reference in case you need a new key.

1. Outboard motor serial number location

ZMU06472

1. Key number

General information

EMU33520

Read manuals and labels

Before operating or working on this motor:

●

Read this manual.

●

Read any manuals supplied with the boat.

●

Read all labels on the outboard motor and the boat.

If you need any additional information, contact your Yamaha dealer.

EMU33831

Warning labels

If these labels are damaged or missing, contact your Yamaha dealer for replacements.

F25A, F25EA, T25A

ZMU06477

General information

F25EHA, F25MHA

ZMU06475

General information

ZMU05670

General information

EMU33843

Symbols

The following symbols mean as follows.

Notice/Warning

Read Owner’s Manual

Hazard caused by continuous rotation

Electrical hazard

Remote control lever/gear shift lever operat-

ing direction, dual direction

Engine start/ Engine cranking

ZMU05696

ZMU05664

ZMU05665

ZMU05666

ZMU05667

ZMU05668

Specifications and requirements

EMU34520

Specifications

IP:

“(AL)” stated in the specification data below

represents the numerical value for the alumi-

num propeller installed.

Likewise, “(SUS)” represents the value for

stainless steel propeller installed and “(PL)”

for plastic propeller installed.

IP:

“*” means, select the engine oil referring to

the chart of engine oil paragraph. For further

information, see page 18.

EMU2821D

Dimension:

Overall length:

F25A 724 mm (28.5 in)

F25EA 724 mm (28.5 in)

F25EHA 1181 mm (46.5 in)

F25MHA 1181 mm (46.5 in)

T25A 735 mm (28.9 in)

Overall width:

398 mm (15.7 in)

Overall height S:

F25EA 1156 mm (45.5 in)

F25EHA 1156 mm (45.5 in)

F25MHA 1157 mm (45.6 in)

Overall height L:

F25A 1283 mm (50.5 in)

F25EA 1284 mm (50.6 in)

F25EHA 1284 mm (50.6 in)

F25MHA 1284 mm (50.6 in)

T25A 1312 mm (51.7 in)

Transom height S:

423 mm (16.7 in)

Transom height L:

F25A 550 mm (21.7 in)

F25EA 550 mm (21.7 in)

F25EHA 550 mm (21.7 in)

F25MHA 550 mm (21.7 in)

T25A 536 mm (21.1 in)

Weight (AL) S:

F25EA 78.0 kg (172 lb)

F25EHA 80.0 kg (176 lb)

F25MHA 77.0 kg (170 lb)

Weight (AL) L:

F25A 82.0 kg (181 lb)

F25EA 79.0 kg (174 lb)

F25EHA 81.0 kg (179 lb)

F25MHA 78.0 kg (172 lb)

T25A 92.0 kg (203 lb)

Performance:

Full throttle operating range:

5000–6000 r/min

Maximum output:

18.4 kW@5500 r/min

(25 HP@5500 r/min)

Idling speed (in neutral):

975

50 r/min

Engine:

Type:

4-stroke L

Displacement:

498.0 cm

Bore

stroke:

65.0

75.0 mm (2.56

2.95 in)

Ignition system:

CDI

Spark plug with resistor (NGK):

DPR6EB-9

Spark plug gap:

0.8–0.9 mm (0.031–0.035 in)

Control system:

F25A Remote control

F25EA Remote control

F25EHA Tiller

F25MHA Tiller

T25A Remote control

Starting system:

F25A Electric

F25EA Electric

Specifications and requirements

F25EHA Electric

F25MHA Manual

T25A Electric

Starting carburetion system:

Prime start

Valve clearance (cold engine) IN:

0.15–0.25 mm (0.0059–0.0098 in)

Valve clearance (cold engine) EX:

0.25–0.35 mm (0.0098–0.0138 in)

Min. cold cranking amps (CCA/SAE):

F25A 245.0 A

F25EA 245.0 A

F25EHA 245.0 A

T25A 245.0 A

Min. marine cranking amps (MCA/ABYC):

F25A 323.0 A

F25EA 323.0 A

F25EHA 323.0 A

T25A 323.0 A

Min. reserve capacity (RC/SAE):

F25A 52 minutes

F25EA 52 minutes

F25EHA 52 minutes

T25A 52 minutes

Maximum generator output:

14 A

Drive unit:

Gear positions:

Forward-neutral-reverse

Gear ratio:

F25A 2.08(27/13)

F25EA 2.08(27/13)

F25EHA 2.08(27/13)

F25MHA 2.08(27/13)

T25A 2.42(29/12)

Trim and tilt system:

F25A Power trim and tilt

F25EA Manual tilt

F25EHA Manual tilt

F25MHA Manual tilt

T25A Power trim and tilt

Fuel and oil:

Recommended fuel:

Regular unleaded gasoline

Min. pump octane:

Fuel tank capacity:

24 L (6.34 US gal, 5.28 Imp.gal)

Recommended engine oil:

4-stroke outboard motor oil

Recommended engine oil group 1*:

SAE 10W-30/10W-40/5W-30

API SE/SF/SG/SH/SJ/SL

Recommended engine oil group 2*:

SAE 15W-40/20W-40/20W-50

API SH/SJ/SL

Lubrication:

Wet sump

Total engine oil quantity (oil pan capacity):

Without oil filter replacement:

1.4 L (1.48 US qt, 1.23 Imp.qt)

With oil filter replacement:

1.6 L (1.69 US qt, 1.41 Imp.qt)

Recommended gear oil:

Hypoid gear oil SAE#90

Gear oil quantity:

F25A 0.320 L

(0.338 US qt, 0.282 Imp.qt)

F25EA 0.320 L

(0.338 US qt, 0.282 Imp.qt)

F25EHA 0.320 L

(0.338 US qt, 0.282 Imp.qt)

F25MHA 0.320 L

(0.338 US qt, 0.282 Imp.qt)

T25A 0.430 L

(0.455 US qt, 0.378 Imp.qt)

Tightening torque for engine:

Spark plug:

17.0 Nm (1.73 kgf-m, 12.5 ft-lb)

Propeller nut:

35.0 Nm (3.57 kgf-m, 25.8 ft-lb)

Engine oil drain bolt:

Specifications and requirements

27.0 Nm (2.75 kgf-m, 19.9 ft-lb)

Engine oil filter:

18.0 Nm (1.84 kgf-m, 13.3 ft-lb)

EMU33554

Installation requirements

EMU33563

Boat horsepower rating

WARNING

EWM01560

Overpowering a boat can cause severe

instability.

Before installing the outboard motor(s), con-

firm that the total horsepower of your mo-

tor(s) does not exceed the boats maximum

horsepower rating. See the boat’s capacity

plate or contact the manufacturer.

EMU33571

Mounting motor

WARNING

EWM01570

●

Improper mounting of the outboard mo-

tor could result in hazardous condi-

tions such as poor handling, loss of

control, or fire hazards.

●

Because the motor is very heavy, spe-

cial equipment and training is required

to mount it safely.

Your dealer or other person experienced in

proper rigging should mount the motor using

correct equipment and complete rigging in-

structions. For further information, see page

39.

EMU33581

Remote control requirements

WARNING

EWM01580

●

If the engine starts in gear, the boat can

move suddenly and unexpectedly, pos-

sibly causing a collision or throwing

passengers overboard.

●

If the engine ever starts in gear, the

start-in-gear protection device is not

working correctly and you should dis-

continue using the outboard. Contact

your Yamaha dealer.

The remote control unit must be equipped

with a start-in-gear protection device(s). This

device prevents the engine from starting un-

less it is in neutral.

EMU25694

Battery requirements

EMU25713

Specifications of Battery

Use a fully charged battery that meets the

following specifications. The engine cannot

be started if battery voltage is too low.

NOTICE

ECM01061

Do not use a battery that does not meet

the specified capacity. If a battery that

does not meet specifications is used, the

electric system could perform poorly or

be overloaded, causing electric system

Minimum cold cranking amps (CCA/

SAE):

F25A 245.0 A

F25EA 245.0 A

F25EHA 245.0 A

T25A 245.0 A

Minimum marine cranking amps (MCA/

ABYC):

F25A 323.0 A

F25EA 323.0 A

F25EHA 323.0 A

T25A 323.0 A

Minimum reserve capacity (RC/SAE):

F25A 52 minutes

F25EA 52 minutes

F25EHA 52 minutes

T25A 52 minutes

Specifications and requirements

damage.

EMU36290

Mounting battery

Mount the battery holder securely in a dry,

well-ventilated, vibration-free location in the

boat.

WARNING! Do not put flammable

items, or loose heavy or metal objects in

the same compartment as the battery.

Fire, explosion or sparks could result.

[EWM01820]

EMU36300

Multiple batteries

To connect multiple batteries, such as for

multiple engine configurations or for an ac-

cessory battery, consult your Yamaha dealer

about battery selection and correct wiring.

EMU25730

Without a rectifier or Rectifier

Regulator

NOTICE

ECM01090

A battery cannot be connected to models

that do not have a rectifier or Rectifier

Regulator.

If you wish to use a battery with the models

without a rectifier or Rectifier Regulator, in-

stall an optional Rectifier Regulator.

Using a maintenance-free battery with the

above models can shorten the life of the bat-

tery significantly.

Install an optional Rectifier Regulator or use

accessories rated to withstand 18 volts or

higher with the above models. Consult your

Yamaha dealer for details on installing an

optional Rectifier Regulator.

EMU34192

Propeller selection

Next to selecting an outboard, choosing the

right propeller is one of the most important

purchasing decisions a boater can make.

The type, size, and design of your propeller

have a direct impact on acceleration, top

speed, fuel economy, and even engine life.

Yamaha designs and manufactures propel-

lers for every Yamaha outboard motor and

every application.

Your outboard motor came with a Yamaha

propeller chosen to perform well over a

range of applications, but there may be uses

where a different propeller would be more

appropriate.

Your Yamaha dealer can help you select the

right propeller for your boating needs. Select

a propeller that will allow the engine to reach

the middle or upper half of the operating

range at full throttle with the maximum boat-

load. Generally, chose a larger pitch propel-

ler for a smaller operating load and a smaller

pitch propeller for a heavier load. If you carry

loads that vary widely, chose the propeller

that lets the engine run in the proper range

for your maximum load but remember that

you may need to reduce your throttle setting

to stay within the recommended engine

speed range when carrying lighter loads.

For instructions on propeller removal and in-

stallation, see page 82.

1. Propeller diameter in inches

2. Propeller pitch in inches

3. Type of propeller (propeller mark)

ZMU04604

123

Specifications and requirements

EMU25770

Start-in-gear protection

Yamaha outboard motors or Yamaha-ap-

proved remote control units are equipped

with start-in-gear protection device(s). This

feature permits the engine to be started only

when it is in neutral. Always select neutral

before starting the engine.

EMU31444

Engine oil requirements

If the recommended engine oil grades are

not available, select an alternative from the

following chart according to the average

temperatures in your area.

EMU36360

Fuel requirements

EMU36781

Gasoline

Use a good quality gasoline that meets the

minimum octane rating. If knocking or ping-

ing occurs, use a different brand of gasoline

or premium unleaded fuel. Yamaha re-

comends that you use alcohol-free (see

Gasohol) gasoline whenever possible.

NOTICE

ECM01981

●

Do not use leaded gasoline. Leaded

gasoline can seriously damage the en-

gine.

●

Avoid getting water and contaminants

in the fuel tank. Contaminated fuel can

cause poor performance or engine

damage. Use only fresh gasoline that

1. Propeller diameter in inches

2. Propeller pitch in inches

3. Type of propeller (propeller mark)

Recommended engine oil:

YAMALUBE 4-M FC-W oil or 4-stroke

motor oil with a combination of the fol-

lowing SAE and API oil classifications

Engine oil type SAE:

10W-30 or 10W-40

Engine oil grade API:

SE, SF, SG, SH, SJ, SL

Total engine oil quantity (oil pan capaci-

ty):

Without oil filter replacement:

1.4 L (1.48 US qt, 1.23 Imp.qt)

With oil filter replacement:

1.6 L (1.69 US qt, 1.41 Imp.qt)

ZMU04606

123

Recommended gasoline:

Regular unleaded gasoline with a min-

imum Octane rating of 86 (Pump Oc-

tane Number) = (R+M)/2

Specifications and requirements

has been stored in clean containers.

Gasohol

There are two types of gasohol: gasohol con-

taining ethanol (E10) and that containing

methanol. Ethanol can be used if the ethanol

content does not exceed 10% and the fuel

meets the minimum octane ratings. E85 is a

fuel containing 85% ethanol and must not be

used in your outboard motor. All ethanol

blends containing more than 10% ethanol

can cause fuel system damage or cause en-

gine starting and running problems. Yamaha

does not recommend gasohol containing

methanol because it can cause fuel system

damage or engine performance problems.

It is recommended that you install a water-

separating marine fuel filter assembly (10

micron minimum) between your boat’s fuel

tank and outboard motor when using etha-

nol. Ethanol is known to allow moisture to be

absorbed into boat fuel tanks and systems.

Moisture in the fuel can cause corrosion of

metallic fuel system components, starting

and running complaints and require addition-

al fuel system maintenance.

EMU27270

Ring Free Fuel Additive

Gasoline is a precise blend of many different

substances, each chosen to give certain

characteristics. Gasoline blends have been

changing in recent years in response to con-

cerns about pollution and resulting emis-

sions regulations. One of the most obvious

changes has been the elimination of lead

from most fuels.

As gasoline has changed, the amount of ad-

ditives such as aromatics and oxygenates

has increased. These additives are impor-

tant for the engines in passenger cars, but

they can have detrimental effects in marine

engines, because of increased deposits in

the combustion chamber. When enough de-

posits collect, piston rings begin sticking.

Performance drops and engine wear in-

creases dramatically.

While many additives available may reduce

deposits, Yamaha recommends the use of

Ring Free Fuel Additive

, available from

your Yamaha dealer.

Ring Free Fuel Addi-

tive

has repeatedly proven its ability to clean

combustion deposits from inside the engine,

notably the critical piston-ring-land area, and

fuel system components. Follow product la-

beling for use instructions.

EMU36880

Muddy or acidic water

Yamaha strongly recommends that you have

your dealer install the optional chromium-

plated water pump kit if you use the outboard

motor in muddy or acidic water conditions.

However, depending on the model it might

not be required.

EMU36330

Anti-fouling paint

A clean hull improves boat performance. The

boat bottom should be kept as clean of ma-

rine growth as possible. If necessary, the

boat bottom can be coated with an anti-foul-

ing paint approved for your area to inhibit

marine growth.

Do not use anti-fouling paint which includes

copper or graphite. These paints can cause

more rapid engine corrosion.

Specifications and requirements

EMU36341

Motor disposal requirements

Never illegally discard (dump) the motor.

Yamaha recommends consulting the dealer

about discarding the motor.

EMU36351

Emergency equipment

Keep the following items onboard in case

there is trouble with the motor.

●

A tool kit with assorted screwdrivers, pli-

ers, wrenches (including metric sizes), and

electrical tape.

●

Waterproof flashlight with extra batteries.

●

An extra engine shut-off cord (lanyard)

with clip.

●

Spare parts, such as an extra set of spark

plugs.

Consult your Yamaha dealer for details.

EMU25221

Emission control information

EMU25230

North American models

This engine conforms to U.S. Environmental

Protection Agency (EPA) regulations for ma-

rine SI engines. See the label affixed to your

engine for details.

EMU25242

Approval label of emission control certif-

icate

This label is attached to the bottom cowling.

New Technology; (4-stroke/HPDI) EM

EMU25262

Manufactured date label

This label is attached to the clamp bracket or

the swivel bracket.

1. Approval label location

1. Manufactured date label location

ZMU06478

ZMU05159

ZMU06480

Specifications and requirements

EMU25273

Star labels

Your outboard motor is labeled with a Cali-

fornia Air Resources Board (CARB) star la-

bel. See below for a description of your

particular label.

EMU25280

One Star—Low Emission

The one-star label identifies engines that

meet the Air Resources Board’s 2001 ex-

haust emission standards. Engines meeting

these standards have 75% lower emissions

than conventional carbureted two-stroke en-

gines. These engines are equivalent to the

U.S. EPA’s 2006 standards for marine en-

gines.

EMU25290

Two Stars—Very Low Emission

The two-star label identifies engines that

meet the Air Resources Board’s 2004 ex-

haust emission standards. Engines meeting

these standards have 20% lower emissions

than One Star-Low-Emission engines.

EMU25300

Three Stars—Ultra Low Emission

The three-star label identifies engines that

meet the Air Resources Board’s 2008 ex-

haust emission standards. Engines meeting

1. Manufactured date label location

1. Star labels location

ZMU06391

Manufactured:

ZMU04346

ZMU06481

ZMU01702

ZMU01703

Specifications and requirements

these standards have 65% lower emissions

than One Star-Low-Emission engines.

EMU33861

Four Stars—Super Ultra Low Emission

The four-star label identifies engines that

meet the Air Resources Board’s Sterndrive

and Inboard marine engine 2009 exhaust

emission standards. Personal Watercraft

and Outboard marine engines may also

comply with these standards. Engines meet-

ing these standards have 90% lower emis-

sions than One Star-Low-Emission engines.

ZMU01704

ZMU05663

Components

EMU2579M

Components diagram

IP:

* May not be exactly as shown; also may not be included as standard equipment on all mod-

els.

F25A, F25EA, T25A

10 3

911

15 14

16 17

ZMU06605

1. Top cowling

2. Cowling lock lever

3. Idle hole

4. Drain screw

5. Anti-cavitation plate

6. Trim tab

7. Propeller

8. Cooling water inlet

9. Clamp bracket

10. Power trim and tilt switch*

11. Alert indicator(s)

12. Tilt support knob*

13. Flushing device

14. Clamp screw*

15. Tilt lock lever*

16. Remote control box (side mount type)*

17. Fuel tank*

Components

F25EHA, F25MHA

EMU25802

Fuel tank

If your model was equipped with a portable

fuel tank, its function is as follows.

WARNING

EWM00020

The fuel tank supplied with this engine is

its dedicated fuel reservoir and must not

be used as a fuel storage container. Com-

mercial users should conform to relevant

licensing or approval authority regula-

tions.

ZMU06606

1. Top cowling

2. Cowling lock lever

3. Idle hole

4. Drain screw

5. Anti-cavitation plate

6. Trim tab

7. Propeller

8. Cooling water inlet

9. Trim rod

10. Clamp bracket

11. Restraint cable attachment

12. Manual starter handle*

13. Gear shift lever

14. Throttle grip

15. Throttle friction adjuster

16. Engine stop button/Engine shut-off switch

17. Clip

18. Alert indicator(s)

19. Clamp screw

20. Steering friction lever

21. Tilt lock lever

22. Flushing device

23. Starter button*

24. Fuel tank*

Components

EMU25830

Fuel joint

This joint is used to connect the fuel line.

EMU25841

Fuel gauge

This gauge is located on either the fuel tank

cap or on the fuel joint base. It shows the ap-

proximate amount of fuel remaining in the

tank.

EMU25850

Fuel tank cap

This cap seals the fuel tank. When removed,

the tank can be filled with fuel. To remove the

cap, turn it counterclockwise.

EMU25860

Air vent screw

This screw is on the fuel tank cap. To loosen

the screw, turn it counterclockwise.

EMU26181

Remote control box

The remote control lever actuates both the

shifter and the throttle. The electrical switch-

es are mounted on the remote control box.

EMU26190

Remote control lever

Moving the lever forward from the neutral po-

sition engages forward gear. Pulling the le-

ver back from neutral engages reverse. The

engine will continue to run at idle until the le-

ver is moved about 35° (a detent can be felt).

Moving the lever farther opens the throttle,

and the engine will begin to accelerate.

1. Fuel joint

2. Fuel gauge

3. Fuel tank cap

4. Air vent screw

ZMU02284

1. Power trim and tilt switch

2. Remote control lever

3. Neutral interlock trigger

4. Neutral throttle lever

5. Main switch

6. Engine shut-off switch

7. Throttle friction adjuster

1. Neutral “”

2. Forward “”

3. Reverse “”

4. Shift

5. Fully closed

Components

EMU26201

Neutral interlock trigger

To shift out of neutral, first pull the neutral in-

terlock trigger up.

EMU26211

Neutral throttle lever

To open the throttle without shifting into ei-

ther forward or reverse, put the remote con-

trol lever in the neutral position and lift the

neutral throttle lever.

IP:

The neutral throttle lever will operate only

when the remote control lever is in neutral.

The remote control lever will operate only

when the neutral throttle lever is in the closed

position.

EMU25911

Tiller handle

To change direction, move the tiller handle to

the left or right as necessary.

EMU25922

Gear shift lever

Pulling the gear shift lever towards you puts

the engine in forward gear so that the boat

6. Throttle

7. Fully open

1. Neutral interlock trigger

1. Fully open

2. Fully closed

ZMU03032

Components

moves ahead. Pushing the lever away from

you puts the engine in reverse gear so that

the boat moves astern.

EMU25941

Throttle grip

The throttle grip is on the tiller handle. Turn

the grip counterclockwise to increase speed

and clockwise to decrease speed.

EMU25961

Throttle indicator

The fuel consumption curve on the throttle

indicator shows the relative amount of fuel

consumed for each throttle position. Choose

the setting that offers the best performance

and fuel economy for the desired operation.

1. Forward “”

2. Neutral “”

3. Reverse “”

1. Forward “”

2. Neutral “”

3. Reverse “”

ZMU06486

1. Throttle indicator

ZMU03034

ZMU06488

Components

EMU25975

Throttle friction adjuster

A friction device provides adjustable resis-

tance to movement of the throttle grip or the

remote control lever, and can be set accord-

ing to operator preference.

To increase resistance, turn the adjuster

clockwise. To decrease resistance, turn the

adjuster counterclockwise.

WARNING! Do

not overtighten the friction adjuster. If

there is too much resistance, it could be

difficult to move the remote control lever

or throttle grip, which could result in an

accident.

[EWM00032]

When constant speed is desired, tighten the

adjuster to maintain the desired throttle set-

ting.

EMU25993

Engine shut-off cord (lanyard) and

clip

The clip must be attached to the engine shut-

off switch for the engine to run. The cord

should be attached to a secure place on the

operator’s clothing, or arm or leg. Should the

operator fall overboard or leave the helm, the

cord will pull out the clip, stopping ignition to

the engine. This will prevent the boat from

running away under power.

WARNING! At-

tach the engine shut-off cord to a secure

place on your clothing, or your arm or leg

while operating. Do not attach the cord to

clothing that could tear loose. Do not

route the cord where it could become en-

tangled, preventing it from functioning.

Avoid accidentally pulling the cord dur-

1. Throttle indicator

ZMU03169

ZMU02001

Components

ing normal operation. Loss of engine

power means the loss of most steering

control. Also, without engine power, the

boat could slow rapidly. This could cause

people and objects in the boat to be

thrown forward.

[EWM00122]

EMU26001

Engine stop button

To open the ignition circuit and stop the en-

gine, push this button.

EMU26070

Manual starter handle

To start the engine, first gently pull the han-

1. Cord

2. Clip

3. Engine shut-off switch

1. Cord

2. Clip

3. Engine shut-off switch

ZMU02003

1. Cord

2. Clip

3. Engine shut-off switch

ZMU02083

Components

dle out until resistance is felt. From that posi-

tion, then pull the handle straight out quickly

to crank the engine.

EMU26080

Starter button

To start the engine with the electric starter,

push the starter button.

EMU26090

Main switch

The main switch controls the ignition system;

its operation is described below.

●

“”

(off)

With the main switch in the “” (off) posi-

tion, the electrical circuits are off, and the key

can be removed.

●

“”

(on)

With the main switch in the “” (on) posi-

tion, the electrical circuits are on, and the key

cannot be removed.

●

“”

(start)

With the main switch in the “” (start) po-

sition, the starter motor turns to start the en-

gine. When the key is released, it returns

automatically to the “” (on) position.

EMU31432

Steering friction adjuster

A friction device provides adjustable resis-

tance to the steering mechanism, and can be

set according to operator preference. An ad-

juster lever is located on the bottom of the

tiller handle bracket.

To increase resistance, turn the lever to the

port side “A”.

To decrease resistance, turn the lever to the

starboard side “B”.

WARNING

EWM00040

Do not overtighten the friction adjuster. If

there is too much resistance, it could be

difficult to steer, which could result in an

accident.

ZMU06523

ZMU06526

Components

If the resistance does not increase even

when the lever is turned to the port side “A”,

make sure that the nut is tightened to the

specified torque.

IP:

●

Steering movement is blocked when the

adjuster lever is set to the “A” position.

●

Check the tiller handle for smooth move-

ment when the lever is turned to the star-

board side “B”.

●

Do not apply lubricants such as grease to

the friction areas of the steering friction ad-

juster.

EMU26143

Power trim and tilt switch on remote

control or tiller handle

The power trim and tilt system adjusts the

outboard motor angle in relation to the tran-

som. Pressing the switch “” (up) trims the

outboard motor up, and then tilts it up. Press-

ing the switch “” (down) tilts the outboard

motor down and trims it down. When the

switch is released, the outboard motor will

stop in its current position.

For instructions on using the power trim and

tilt switch, see pages 59 and 62.

EMU26153

Power trim and tilt switch on bottom

engine cowling

The power trim and tilt switch is located on

the side of the bottom engine cowling. Press-

ing the switch “” (up) trims the outboard

motor up, and then tilts it up. Pressing the

switch “” (down) tilts the outboard motor

1. Nut

Nut tightening torque:

4.0 Nm (0.4 kgf-m, 3.0 ft-lb)

ZMU06496

ZMU06497

Components

down and trims it down. When the switch is

released, the outboard motor will stop in its

current position.

For instructions on using the power trim and

tilt switch, see page 62.

WARNING

EWM01030

Use the power trim and tilt switch located

on the bottom engine cowling only when

the boat is at a complete stop with the en-

gine off. Attempting to use this switch

while the boat is moving could increase

the risk of falling overboard and could

distract the operator, increasing the risk

of collision with another boat or an obsta-

cle.

EMU26244

Trim tab with anode

WARNING

EWM00840

An improperly adjusted trim tab could

cause difficult steering. Always test run

after the trim tab has been installed or re-

placed to be sure steering is correct. Be

sure you have tightened the bolt after ad-

justing the trim tab.

The trim tab should be adjusted so that the

steering control can be turned to either the

right or left by applying the same amount of

force.

If the boat tends to veer to the left (port side),

turn the trim tab rear end to the port side “A”

in the figure. If the boat tends to veer to the

right (starboard side), turn the trim tab end to

the starboard side “B” in the figure.

NOTICE

ECM00840

The trim tab also serves as an anode to

protect the engine from electrochemical

corrosion. Never paint the trim tab as it

will become ineffective as an anode.

EMU26253

Trim tab

WARNING

EWM00840

An improperly adjusted trim tab could

cause difficult steering. Always test run

after the trim tab has been installed or re-

placed to be sure steering is correct. Be

sure you have tightened the bolt after ad-

justing the trim tab.

The trim tab should be adjusted so that the

1. Power trim and tilt switch

ZMU06495

1. Trim tab

2. Bolt

Bolt tightening torque:

18.0 Nm (1.8 kgf-m, 13 ft-lb)

ZMU02822

Components

steering control can be turned to either the

right or left by applying the same amount of

force.

If the boat tends to veer to the left (port side),

turn the trim tab rear end to the port side “A”

in the figure.

If the boat tends to veer to the right (star-

board side), turn the trim tab end to the star-

board side “B” in the figure.

EMU26261

Trim rod (tilt pin)

The position of the trim rod determines the

minimum trim angle of the outboard motor in

relation to the transom.

EMU30440

Tilt lock mechanism

The tilt lock mechanism is used to prevent

the outboard motor from lifting out of the wa-

ter when in reverse gear.

To tilt the outboard motor up, set the tilt lock

lever to the “” (up) position. To tilt the out-

board motor down, set the tilt lock lever to

the “” (down) position.

EMU26321

Tilt support knob

To keep the outboard motor in the tilted up

position, push the tilt support knob under the

swivel bracket.

NOTICE

ECM00660

Do not use the tilt support lever or knob

when trailering the boat. The outboard

motor could shake loose from the tilt sup-

1. Trim tab

2. Bolt

Bolt tightening torque:

8.0 Nm (0.8 kgf-m, 5.8 ft-lb)

ZMU06498

ZMU06536

1. Tilt lock lever

ZMU06500

ZMU06543

Components

port and fall. If the motor cannot be trail-

ered in the normal running position, use

an additional support device to secure it

in the tilt position.

EMU26332

Tilt support bar

The tilt support bar keeps the outboard motor

in the tilted up position.

NOTICE

ECM01660

Do not use the tilt support bar when

trailering the boat. The outboard motor

could shake loose from the tilt support

and fall. If the motor cannot be trailered in

the normal running position, use an addi-

tional support device to secure it in the

tilt position.

EMU26373

Cowling lock lever(s) (turn type)

To remove the engine top cowling, turn the

cowling lock lever(s) and lift off the cowling.

When installing the cowling, check to be sure

it fits properly in the rubber seal. Then lock

the cowling again by returning the cowling

lock lever(s) to the lock position.

EMU26460

Flushing device

This device is used to clean the cooling wa-

ter passages of the motor using a garden

hose and tap water.

IP:

For details on usage, see page 71.

EMU26303

Alert indicator

If the engine develops a condition which is

cause for alert, the indicator lights up. For

details on how to read the alert indicator, see

page 37.

ZMU06503

1. Cowling lock lever(s)

1. Flushing device

ZMU04041

ZMU06505

Components

1. Alert indicator

ZMU06506

Instruments and indicators

EMU36014

Indicators

EMU36024

Low oil pressure-alert indicator

If oil pressure drops too low, this indicator will

light up. For further information, see page 37.

NOTICE

ECM00022

●

Do not continue to run the engine if the

low oil pressure-alert indicator is on

and the engine oil level is lower. Seri-

ous engine damage will occur.

●

The low oil pressure-alert indicator

does not indicate the engine oil level.

Use the oil dipstick to check the re-

maining oil quantity. For further infor-

mation, see page 45.

EMU36033

Overheat-alert indicator

If the engine temperature rises too high, this

indicator will light up. For further information

on reading the indicator, see page 37.

NOTICE

ECM00052

Do not continue to run the engine if the

overheat-alert indicator is on. Serious en-

gine damage will occur.

1. Low oil pressure-alert indicator

ZMU06507

1. Overheat-alert indicator

ZMU06508

Engine control system

EMU26803

Alert system

NOTICE

ECM00091

Do not continue to operate the engine if a

alert device has activated. Consult your

Yamaha dealer if the problem cannot be

located and corrected.

EMU2681A

Overheat alert

This engine has an overheat-alert device. If

the engine temperature rises too high, the

alert device will activate.

●

The engine speed will automatically de-

crease to about 2000 r/min.

●

The overheat-alert indicator will light or

blink.

●

The buzzer will sound (if equipped on the

tiller handle, remote control box, or main

switch panel).

If the alert system has activated, stop the en-

gine and check the cooling water inlets:

●

Check trim angle to be sure that the cool-

ing water inlet is submerged.

●

Check the cooling water inlet for clogging.

EMU3016A

Low oil pressure alert

If the oil pressure drops too low, the alert de-

vice will activate.

●

The engine speed will automatically de-

crease to about 2000 r/min. If equipped

with a low oil pressure-alert indicator, it will

light or blink.

●

The buzzer will sound (if equipped on the

tiller handle, remote control box, or main

switch panel).

ZMU06509

ZMU03026

ZMU06510

Engine control system

If the alert system has activated, stop the en-

gine as soon as it is safe to do so. Check the

oil level and add oil as needed. If the oil level

is correct and the alert device does not

switch off, consult your Yamaha dealer.

ZMU02360

Installation

EMU26902

Installation

The information presented in this section is

intended as reference only. It is not possible

to provide complete instructions for every

possible boat and motor combination. Prop-

er mounting depends in part on experience

and the specific boat and motor combination.

WARNING

EWM01590

●

Overpowering a boat could cause se-

vere instability. Do not install an out-

board motor with more horsepower

than the maximum rating on the capac-

ity plate of the boat. If the boat does not

have a capacity plate, consult the boat

manufacturer.

●

Improper mounting of the outboard mo-

tor could result in hazardous condi-

tions such as poor handling, loss of

control, or fire hazards. For permanent-

ly mounted models, your dealer or oth-

er person experienced in proper

rigging should mount the motor.

EMU33470

Mounting the outboard motor

The outboard motor should be mounted so

that the boat is well balanced. Otherwise, the

boat could be hard to steer. For single-en-

gine boats, mount the outboard motor on the

centerline (keel line) of the boat.

EMU26923

Mounting height

To run your boat at optimum efficiency, the

water resistance (drag) of the boat and out-

board motor must be made as little as possi-

ble. The mounting height of the outboard

motor greatly affects the water resistance. If

the mounting height is too high, cavitation

tends to occur, thus reducing the propulsion;

and if the propeller tips cut the air, the engine

speed will rise abnormally and cause the en-

gine to overheat. If the mounting height is too

low, the water resistance will increase and

thereby reduce engine efficiency. Mount the

outboard motor so that the anti-cavitation

plate is between the bottom of the boat and

a level 25 mm (1 in) below it.

1. Center line (keel line)

ZMU01760

Installation

NOTICE

ECM01631

●

Check that the idle hole stays high

enough to keep out water getting inside

engine even if the boat is in stationary

with maximum load.

●

Incorrect engine height or obstructions

to the smooth flow of water (such as the

design or condition of the boat, or ac-

cessories such as transom ladders or

depth finder transducers) can create

airborne water spray while the boat is

cruising. If the motor is operated con-

tinuously in the presence of airborne

water spray, enough water could enter

the engine through the intake opening

on the cowling to cause severe engine

damage. Eliminate the cause of the air-

borne water spray.

IP:

●

The optimum mounting height of the out-

board motor is affected by the boat and

motor combination and the desired use.

Test runs at different heights can help de-

termine the optimum mounting height.

Consult your Yamaha dealer or boat man-

ufacturer for further information on deter-

mining the proper mounting height.

●

For instructions on setting the trim angle of

the outboard motor, see page 59.

EMU26972

Clamping the outboard motor

1. Place the outboard motor on the tran-

som so that it is positioned as close to

the center as possible. Tighten the tran-

som clamp screws evenly and securely.

Occasionally check the clamp screws

for tightness during operation of the out-

board motor because they could be-

come loose due to engine vibration.

WARNING! Loose clamp screws

could allow the outboard motor to fall

off or move on the transom. This

could cause loss of control and seri-

ous injury. Make sure the transom

screws are tightened securely. Occa-

sionally check the screws for tight-

ness during operation.

[EWM00641]

2. If the restraint cable attachment is

equipped on your engine, a restraint ca-

ble or chain should be used. Attach one

end to the restraint cable attachment

and the other to a secure mounting point

on the boat. Otherwise the engine could

be completely lost if it accidentally falls

off the transom.

ZMU02012

Installation

3. Secure the clamp bracket to the transom

using the bolts provided with the out-

board (if packed). For details, consult

your Yamaha dealer.

WARNING! Avoid

using bolts, nuts or washers other

than those contained in the engine

packaging. If used, they must be of at

least the same quality of material and

strength and must be tightened se-

curely. After tightening, test run the

engine and check their tightness.

[EWM00651]

1. Bolts

ZMU02013

ZMU02637

Operation

EMU36381

First-time operation

EMU36391

Fill engine oil

The engine is shipped from the factory with-

out engine oil. If your dealer did not fill the oil,

you must fill it before starting the engine.

NOTICE:

Check that the engine is filled

with oil before first-time operation to

avoid severe engine damage.

[ECM01781]

The engine is shipped with the following

sticker, which should be removed after en-

gine oil is filled for the first time. For more in-

formation on checking the engine oil level,

see page 45.

EMU30174

Breaking in engine

Your new engine requires a period of break-

in to allow mating surfaces of moving parts to

wear in evenly. Correct break-in will help en-

sure proper performance and longer engine

life.

NOTICE:

Failure to follow the break-in

procedure could result in reduced engine

life or even severe engine damage.

[ECM00801]

EMU27085

Procedure for 4-stroke models

Your new engine requires a period of 10

hours break-in to allow mating surfaces of

moving parts to wear in evenly.

IP:

Run the engine in the water, under load (in

gear with a propeller installed) as follows.

For 10 hours for breaking in engine avoid ex-

tended idling, rough water and crowded ar-

eas.

1. For the first hour of operation:

Run the engine at varying speeds up to

2000 r/min or approximately half throttle.

2. For the second hour of operation:

Increase engine speed as much as nec-

essary to put the boat on plane (but

avoid full-throttle operation), then back

off on the throttle while keeping the boat

at a planing speed.

3. Remaining 8 hours:

Run the engine at any speed. However,

avoid operating at full throttle for more

than 5 minutes at a time.

4. After the first 10 hours:

Operate the engine normally.

EMU36400

Getting to know your boat

Different boats handle differently. Operate

cautiously while you learn how your boat

handles under different conditions and with

different trim angles (see page 59).

EMU36412

Checks before starting engine

WARNING

EWM01920

If any item in the checks before starting

engine is not working properly, have it in-

spected and repaired before operating

the outboard motor. Otherwise an acci-

dent could occur.

NOTICE

ECM00120

Do not start the engine out of water. Over-

heating and serious engine damage can

occur.

EMU36560

Fuel level

Be sure you have plenty of fuel for your trip.

ZMU01710

Operation

A good rule is to use 1/3 of your fuel to get to

the destination, 1/3 to return, and to keep 1/

3 as an emergency reserve. With the boat

level on a trailer or in the water, check the

fuel level. For fuel filling instructions, see

page 46.

EMU36570

Remove cowling

For the following checks, remove the top

cowling from the engine. To remove the en-

gine top cowling, release the lock lever and

lift off the cowling.

EMU36442

Fuel system

WARNING

EWM00060

Gasoline and its vapors are highly flam-

mable and explosive. Keep away from

sparks, cigarettes, flames, or other

sources of ignition.

WARNING

EWM00910

Leaking fuel can result in fire or explo-

sion.

●

Check for fuel leakage regularly.

●

If any fuel leakage is found, the fuel

system must be repaired by a qualified

mechanic. Improper repairs can make

the outboard unsafe to operate.

EMU36451

Check for fuel leaks

●

Check for fuel leaks or gasoline fumes in

the boat.

●

Check for fuel leakage from the fuel sys-

tem.

●

Check the fuel tank and fuel lines for

cracks, swellings, or other damages.

EMU37320

Check the fuel filter

Check that the fuel filter is clean and free of

water. If any water is found in the fuel, or if a

significant amount of debris is found, the fuel

tank should be checked and cleaned by a

Yamaha dealer.

EMU38900

Controls

Tiller handle models:

●

Move the tiller handle fully to the left and

right to make sure operation is smooth.

●

Turn the throttle grip from the fully closed

to the fully open position. Make sure that it

turns smoothly and that it completely re-

turns to the fully closed position.

●

Look for loose or damaged connections of

the throttle cable and shift link.

Remote control models:

●

Turn the steering wheel full-right and full-

left. Make sure operation is smooth and

unrestricted throughout the whole range

with no binding or excessive free play.

●

Operate the throttle levers several times to

ZMU06085

ZMU06513

Operation

make sure there is no hesitation in their

travel. Operation should be smooth over

the complete range of motion, and each le-

ver should return completely to the idle po-

sition.

●

Look for loose or damaged connections of

the throttle and shift cables.

EMU36481

Engine shut-off cord (lanyard)

Inspect the engine shut-off cord for damage,

such as cuts, breaks, and wear.

ZMU06590

ZMU06589

1. Cord

2. Clip

3. Engine shut-off switch

1. Cord

2. Clip

3. Engine shut-off switch

1. Cord

2. Clip

3. Engine shut-off switch

ZMU02003

Operation

EMU27166

Engine oil

1. Put the outboard motor in an upright po-

sition (not tilted).

NOTICE:

If the motor

is not level, the oil level indicated on

the dipstick may not be accurate.

[ECM01790]

2. Remove oil dipstick and wipe it clean.

3. Insert the dipstick and remove it again.

Be sure to completely insert the dipstick

into the dipstick guide, otherwise the oil

level measurement will be incorrect.

4. Check the oil level using the dipstick to

be sure the level falls between the upper

and lower marks. Fill with oil if it is below

the lower mark, or drain to the specified

level if it is above the upper mark.

EMU27153

Engine

●

Check the engine and engine mounting.

●

Look for loose or damaged fasteners.

●

Check the propeller for damage.

●

Check for engine oil leaks.

EMU36490

Flushing device

Check that flushing device’s garden hose

connector is securely screwed on to the fit-

ting on the bottom cowling.

NOTICE:

If the

flushing device is not properly connect-

ed, cooling water can leak out and the en-

gine can overheat during operation.

[ECM01800]

EMU36953

Install cowling

1. Be sure that a cowling lock lever is re-

leased.

2. Be sure that the rubber seal is seated all

the way around the top cowling.

3. Place the top cowling on bottom cowl-

ing.

4. Check to be sure the rubber seal fits cor-

rectly all the way around the engine.

5. Move the lever to lock the cowling as

shown.

NOTICE:

If the cowling is not

1. Oil dipstick

2. Lower level mark

ZMU06515

ZMU06516

3. Upper level mark

1. Fitting

2. Flushing device

ZMU06517

Operation

installed correctly, water spray under

the cowling can damage the engine,

or the cowling can blow off at high

speeds.

[ECM01990]

After installing, check the fitting of the top

cowling by pushing it with both hands. If the

top cowling is loose, have it repaired by your

Yamaha dealer.

EMU38910

Checking power trim and tilt system

WARNING

EWM01970

●

Never get under the lower unit while it

is tilted, even when the tilt support

knob is locked. Severe injury could oc-

cur if the outboard motor accidentally

falls.

●

Body parts can be crushed between the

motor and the clamp bracket when the

motor is trimmed or tilted.

●

Be sure no one is near the outboard

motor before performing this check.

1. Check the power trim and tilt unit for any

sign of oil leaks.

2. Operate each of the power trim and tilt

switches to check that all switches work.

3. Tilt the outboard motor up and check

that the trim and tilt rod is pushed out

completely.

4. Check that the trim and tilt rod is free of

corrosion or other flaws.

5. Tilt the outboard motor down. Check

that the trim and tilt rod operates

smoothly.

EMU36582

Battery

Check that the battery is in good condition,

and fully charged. Check that the battery

connections are clean, secure and covered

by insulating covers. The electrical contacts

of the battery and cables must be clean and

properly connected or the battery will not

start the engine.

Refer to the battery manufacturer’s instruc-

tions for checks for your particular battery.

EMU27437

Filling fuel

WARNING

EWM01830

●

Gasoline and its vapors are highly flam-

ZMU06110

1. Trim and tilt rod

ZMU02828

Operation

mable and explosive. Always refuel ac-

cording to this procedure to reduce the

risk of fire and explosion.

●

Gasoline is poisonous and can cause

injury or death. Handle gasoline with

care. Never siphon gasoline by mouth.

If you should swallow some gasoline or

inhale a lot of gasoline vapor, or get

some gasoline in your eyes, see your

doctor immediately. If gasoline spills

on your skin, wash with soap and wa-

ter. If gasoline spills on your clothing,

change your clothes.

1. Be sure the engine is stopped.

2. Disconnect the fuel line from the fuel

tank and tighten the air vent screw on

the fuel tank cap.

3. Remove the portable tank from the boat.

4. Be sure you are in a well-ventilated out-

door area, either securely moored or

trailered.

5. Do not smoke and keep away from

sparks, flames, static electric discharge,

or other sources of ignition.

6. If you use a portable container to store

and dispense fuel, use only an approved

GASOLINE container.

7. Touch the fuel nozzle to the filler open-

ing or funnel to help prevent electrostatic

sparks.

8. Fill the fuel tank, but do not overfill. Fuel

can expand and overflow if the tempera-

ture increases.

9. Tighten the filler cap securely.

10. Wipe up any spilled gasoline immediate-

ly with dry rags. Dispose rags properly

according to local laws or regulations.

EMU27451

Operating engine

EMU27466

Sending fuel (portable tank)

WARNING

EWM00420

●

Before starting the engine, make sure

that the boat is tightly moored and that

you can steer clear of any obstructions.

Be sure there are no swimmers in the

ZMU06598

ZMU02301

Fuel tank capacity:

24 L (6.34 US gal, 5.28 Imp.gal)

ZMU02834

Operation

water near you.

●

When the air vent screw is loosened,

gasoline vapor will be released. Gaso-

line is highly flammable, and its vapors

are flammable and explosive. Refrain

from smoking, and keep away from

open flames and sparks while loosen-

ing the air vent screw.

●

This product emits exhaust gases

which contain carbon monoxide, a col-

orless, odorless gas which could cause

brain damage or death when inhaled.

Symptoms include nausea, dizziness,

and drowsiness. Keep cockpit and cab-

in areas well ventilated. Avoid blocking

exhaust outlets.

1. If there is an air vent screw on the fuel

tank cap, loosen it 2 or 3 turns.

2. If there is a fuel joint on the motor, firmly

connect the fuel line to the joint. Then

firmly connect the other end of the fuel

line to the joint on the fuel tank.

IP:

Wipe up any spilled gasoline immediately

with dry rags. Dispose rags properly accord-

ing to local laws or regulations.

3. Squeeze the primer pump, with the ar-

row pointing up, until you feel it become

firm. During engine operation place the

tank horizontally, otherwise fuel cannot

be drawn from the fuel tank.

ZMU02295

1. Arrow

ZMU06520

ZMU02024

Operation

EMU27493

Starting engine

WARNING

EWM01600

Before starting the engine, make sure

that the boat is tightly moored and that

you can steer clear of any obstructions.

Be sure there are no swimmers in the wa-

ter near you.

EMU39011

Starting engine

WARNING

EWM01840

●

Failure to attached engine shut-off cord

could result in a runaway boat if opera-

tor is ejected. Attach the engine shut-

off cord to a secure place on your cloth-

ing, or your arm or leg while operating.

Do not attach the cord to clothing that

could tear loose. Do not route the cord

where it could become entangled, pre-

venting it from functioning.

●

Avoid accidentally pulling the cord dur-

ing normal operation. Loss of engine

power means the loss of most steering

control. Also, without engine power,

the boat could slow rapidly. This could

cause people and objects in the boat to

be thrown forward.

Starting procedure (cold engine)

1. Place the gear shift lever in neutral.

IP:

The start-in-gear protection device prevents

the engine from starting except when in neu-

tral.

2. Attach the engine shut-off cord to a se-

cure place on your clothing, or your arm

or leg. Then install the clip on the other

end of the cord into the engine shut-off

switch.

3. Place the throttle grip in the “”

(start) position.

4. Pull the manual starter handle slowly un-

til you feel resistance. Then give a

strong pull straight out to crank and start

the engine. Repeat if necessary.

ZMU06521

ZMU02026

ZMU06522

Operation

5. After the engine starts, slowly return the

manual starter handle to its original po-

sition before releasing it.

IP:

When the engine is cold, it needs to be

warmed up. For further information, see

page 55.

6. Slowly return the throttle grip to the fully

closed position.

Starting procedure (warm engine)

1. Place the gear shift lever in neutral.

IP:

The start-in-gear protection device prevents

the engine from starting except when in neu-

tral.

2. Attach the engine shut-off cord to a se-

cure place on your clothing, or your arm

or leg. Then install the clip on the other

end of the cord into the engine shut-off

switch.

3. Open the throttle grip as shown in the il-

lustration.

IP:

●

If the throttle is opened too much, the en-

gine speed rises rapidly, causing the out-

board motor to swivel toward the starboard

side.

●

Do not repeat opening and closing of the

throttle grip as this cause the spark plug to

wet with fuel and prevent from the engine

to start.

4. Hold this throttle grip position by tighten-

ing the throttle friction adjuster.

ZMU06523

ZMU06521

ZMU02026

ZMU06609

Operation

5. Pull the manual starter handle slowly un-

til you feel resistance. Then give a

strong pull straight out to crank and start

the engine. Repeat if necessary.

6. After the engine starts, slowly return the

manual starter handle to its original po-

sition before releasing it.

7. Loosen the throttle friction adjuster and

return the throttle to the fully closed po-

sition.

WARNING! Loosen the throttle

friction adjuster. If there is too much

resistance, it could be difficult to

move the throttle grip, which could

result in an accident.

[EWM02250]

EMU27595

Electric start / prime start models

WARNING

EWM01840

●

Failure to attached engine shut-off cord

could result in a runaway boat if opera-

tor is ejected. Attach the engine shut-

off cord to a secure place on your cloth-

ing, or your arm or leg while operating.

Do not attach the cord to clothing that

could tear loose. Do not route the cord

where it could become entangled, pre-

venting it from functioning.

●

Avoid accidentally pulling the cord dur-

ing normal operation. Loss of engine

power means the loss of most steering

control. Also, without engine power,

the boat could slow rapidly. This could

cause people and objects in the boat to

be thrown forward.

1. Place the gear shift lever in neutral.

IP:

The start-in-gear protection device prevents

the engine from starting except when in neu-

tral.

2. Attach the engine shut-off cord to a se-

cure place on your clothing, or your arm

or leg. Then install the clip on the other

end of the cord into the engine shut-off

switch.

ZMU06608

ZMU06523

Operation

3. Place the throttle grip in the “”

(start) position. After the engine starts,

return the throttle to the fully closed po-

sition.

4. Turn the main switch to “” (start),

and hold it for a maximum of 5 seconds.

5. Immediately after the engine starts, re-

lease the main switch and allow it to re-

turn to “” (on).

NOTICE:

Never turn

the main switch to “” (start)

while the engine is running. Do not

keep the starter motor turning for

more than 5 seconds. If the starter

motor is turned continuously for

more than 5 seconds, the battery will

be quickly discharged, thus making it

impossible to start the engine. The

starter can also be damaged. If the

engine will not start after 5 seconds

of cranking, return the main switch to

“” (on), wait 10 seconds, then

crank the engine again.

[ECM00192]

IP:

●

When the engine is cold, it needs to be

warmed up. For further information, see

page 55.

●

If the engine is warm and fails to start,

open the throttle slightly and try to start the

engine again. If the engine still fails to

start, see page 89.

EMU27604

Electric start/prime start models

WARNING

EWM01840

●

Failure to attached engine shut-off cord

could result in a runaway boat if opera-

tor is ejected. Attach the engine shut-

off cord to a secure place on your cloth-

ing, or your arm or leg while operating.

Do not attach the cord to clothing that

could tear loose. Do not route the cord

where it could become entangled, pre-

venting it from functioning.

●

Avoid accidentally pulling the cord dur-

ing normal operation. Loss of engine

power means the loss of most steering

control. Also, without engine power,

the boat could slow rapidly. This could

cause people and objects in the boat to

be thrown forward.

1. Place the gear shift lever in neutral.

Operation

IP:

The start-in-gear protection device prevents

the engine from starting except when in neu-

tral.

2. Attach the engine shut-off cord to a se-

cure place on your clothing, or your arm

or leg. Then install the clip on the other

end of the cord into the engine shut-off

switch.

3. Place the throttle grip in the “”

(start) position. After the engine starts,

return the throttle to the fully closed po-

sition.

4. Push the starter button to start the en-

gine.

5. Immediately after the engine starts, re-

lease the starter button and allow it to re-

turn to its original position.

NOTICE:

Never push the starter button while

the engine is running. Do not keep

the starter motor turning for more

than 5 seconds. If the starter motor is

turned continuously for more than 5

seconds, the battery will be quickly

discharged, thus making it impossi-

ble to start the engine. The starter can

also be damaged. If the engine will

not start after 5 seconds of cranking,

release the starter button, wait 10

seconds, then crank the engine

again.

[ECM00161]

IP:

●

When the engine is cold, it needs to be

ZMU06521

ZMU02026

ZMU06522

ZMU06526

Operation

warmed up. For further information, see

page 55.

●

If the engine is warm and fails to start,

open the throttle slightly and try to start the

engine again. If the engine still fails to

start, see page 89.

6. Slowly return the throttle grip to the fully

closed position.

EMU27664

Electric start and remote control models

WARNING

EWM01840

●

Failure to attached engine shut-off cord

could result in a runaway boat if opera-

tor is ejected. Attach the engine shut-

off cord to a secure place on your cloth-

ing, or your arm or leg while operating.

Do not attach the cord to clothing that

could tear loose. Do not route the cord

where it could become entangled, pre-

venting it from functioning.

●

Avoid accidentally pulling the cord dur-

ing normal operation. Loss of engine

power means the loss of most steering

control. Also, without engine power,

the boat could slow rapidly. This could

cause people and objects in the boat to

be thrown forward.

1. Place the remote control lever in neutral.

IP:

The start-in-gear protection device prevents

the engine from starting except when in neu-

tral.

2. Attach the engine shut-off cord to a se-

cure place on your clothing, or your arm

or leg. Then install the clip on the other

end of the cord into the engine shut-off

switch.

3. Turn the main switch to “” (on).

4. Turn the main switch to “” (start),

and hold it for a maximum of 5 seconds.

5. Immediately after the engine starts, re-

lease the main switch and allow it to re-

turn to “” (on).

NOTICE:

Never turn

the main switch to “” (start)

while the engine is running. Do not

keep the starter motor turning for

more than 5 seconds. If the starter

motor is turned continuously for

more than 5 seconds, the battery will

be quickly discharged, thus making it

impossible to start the engine. The

Operation

starter can also be damaged. If the

engine will not start after 5 seconds

of cranking, return the main switch to

“” (on), wait 10 seconds, then

crank the engine again.

[ECM00192]

IP:

●

When the engine is cold, it needs to be

warmed up. For further information, see

page 55.

●

If the engine is warm and fails to start,

open the throttle slightly and try to start the

engine again. If the engine still fails to

start, see page 89.

EMU36510

Checks after starting engine

EMU36520

Cooling water

Check for a steady flow of water from the

cooling water pilot hole. A continuous flow of

water from the pilot hole shows that the wa-

ter pump is pumping water through the cool-

ing passages. If the cooling passages are

frozen, it may take a while for water to start

flowing out of the pilot hole.

NOTICE

ECM01810

If water is not flowing out of the pilot hole

at all times while the engine is running,

overheating and serious damage could

occur. Stop the engine and check wheth-

er the cooling water inlet on the lower

case or the cooling water pilot hole is

blocked. Consult your Yamaha dealer if

the problem cannot be located and cor-

rected.

Check that no water leaks from the joints be-

tween the exhaust cover, cylinder head, and

body cylinder.

EMU27670

Warming up engine

EMU27715

Manual start and electric start

models

1. After starting the engine, allow it to idle

for 3 minutes to warm up. Failure to do

so will shorten engine life.

2. Be sure the low oil pressure-alert indica-

tor goes off after starting the engine.

NOTICE:

If the low oil pressure-alert

indicator blinks after the engine

starts, stop the engine. Otherwise se-

rious engine damage could occur.

Check the oil level and add oil if nec-

essary. Consult your Yamaha dealer

if the cause for the low oil pressure-

alert indicator cannot be found.

[ECM01830]

EMU36530

Checks after engine warm-up

EMU36540

Shifting

While tightly moored, and without applying

throttle, confirm that the engine shifts

smoothly into forward and reverse, and back

to neutral.

Operation

EMU36980

Stop switches

●

Turn the main switch to “”, or press the

engine stop button and make sure the en-

gine stops.

●

Confirm that removing the clip from the en-

gine shut-off switch stops the engine.

●

Confirm that the engine cannot be started

with the clip removed from the engine

shut-off switch.

EMU34561

Shifting

WARNING

EWM00180

Before shifting, make sure there are no

swimmers or obstacles in the water near

you.

NOTICE

ECM01610

Warm up the engine before shifting into

gear. Until the engine is warm, the idle

speed may be higher than normal. High

idle speed can prevent you from shifting

back to neutral. If this occurs, stop the

engine, shift to neutral, then restart the

engine and allow it to warm up.

To shift out of neutral

1. Pull the neutral interlock trigger up (if

equipped).

2. Move the remote control lever / gear

shift lever firmly and crisply forward (for

forward gear) or backward (for reverse

gear) [about 35° (a detent can felt) for re-

mote control models]. Be sure to check

that the tilt lock lever is in the lock/down

position (if equipped) before operating in

reverse.

1. Neutral interlock trigger

ZMU06528

ZMU06531

Operation

IP:

Tiller handle models: The gear shift lever op-

erates only when the throttle grip is in the ful-

ly closed position.

To shift from in gear (forward/reverse) to

neutral

1. Close the throttle so that the engine

slows to idle speed.

2. After the engine is at idle speed in gear

move the remote control lever / gear

shift lever firmly and crisply into the neu-

tral position.

ZMU06522

ZMU06521

Operation

EMU31742

Stopping boat

WARNING

EWM01510

●

Do not use the reverse function to slow

down or stop the boat as it could cause

you to lose control, be ejected, or im-

pact the steering wheel or other parts of

the boat. This could increase the risk of

serious injury. It could also damage the

shift mechanism.

●

Do not shift into reverse while traveling

at planing speeds. Loss of control, boat

swamping, or damage to the boat could

occur.

The boat is not equipped with a separate

braking system. Water resistance stops it af-

ter the throttle lever is moved back to idle.

The stopping distance varies depending on

gross weight, water surface conditions, and

wind direction.

EMU27821

Stopping engine

Before stopping the engine, first let it cool off

for a few minutes at idle or low speed. Stop-

ping the engine immediately after operating

at high speed is not recommended.

EMU27845

Procedure

1. Push and hold the engine stop button or

turn the main switch to “” (off).

ZMU02083

Operation

2. After stopping the engine, disconnect

the fuel line if there is a fuel joint on the

outboard motor.

3. Tighten the air vent screw on the fuel

tank cap (if equipped).

4. Remove the key if the boat will be left

unattended.

IP:

The engine can also be stopped by pulling

the cord and removing the clip from the en-

gine shut-off switch, then turning the main

switch to “” (off).

EMU27862

Trimming outboard motor

WARNING

EWM00740

Excessive trim for the operating condi-

tions (either trim up or trim down) can

cause boat instability and can make

steering the boat more difficult. This in-

creases the possibility of an accident. If

the boat begins to feel unstable or is hard

to steer, slow down and/or readjust the

trim angle.

The trim angle of the outboard motor helps

determine the position of the bow of the boat

in the water. Correct trim angle will help im-

prove performance and fuel economy while

reducing strain on the engine. Correct trim

angle depends upon the combination of

boat, engine, and propeller. Correct trim is

also affected by variables such as the load in

the boat, sea conditions, and running speed.

EMU38880

Adjusting trim angle for manual tilt

models

WARNING

EWM00400

●

Stop the engine before adjusting the

trim angle.

●

Use care to avoid being pinched when

removing or installing the rod.

●

Use caution when trying a trim position

for the first time. Increase speed gradu-

ally and watch for any signs of instabil-

ity or control problems. Improper trim

angle can cause loss of control.

There are 4 or 5 holes provided in the clamp

bracket to adjust the outboard motor trim an-

ZMU06533

ZMU02301

1. Trim operating angle

Operation

gle.

1. Stop the engine.

2. Tilt the outboard motor up and remove

the trim rod by pressing clip.

3. Reposition the rod in the desired hole.

To raise the bow (“trim-out”), move the rod

away from the transom.

To lower the bow (“trim-in”), move the rod to-

ward the transom.

Make test runs with the trim set to different

angles to find the position that works best for

your boat and operating conditions.

IP:

The outboard motor trim angle can be

changed approximately 4 degrees by shifting

the trim rod one hole.

EMU27885

Adjusting trim angle (Power trim and

tilt)

WARNING

EWM00753

●

Be sure all people are clear of the out-

board motor when adjusting the trim

angle. Body parts can be crushed be-

tween the motor and the clamp bracket

when the motor is trimmed or tilted.

●

Use caution when trying a trim position

for the first time. Increase speed gradu-

ally and watch for any signs of instabil-

ity or control problems. Improper trim

angle can cause loss of control.

●

If equipped with a power trim and tilt

switch located on the bottom cowling,

use the switch only when the boat is at

a complete stop with the engine off. Do

not adjust the trim angle with this

switch while the boat is moving.

Adjust the outboard motor trim angle using

the power trim and tilt switch.

1. Trim rod

ZMU06566

ZMU06536

ZMU06535

Operation

To raise the bow (trim-out), press the switch

“” (up).

To lower the bow (trim-in), press the switch

“” (down).

Make test runs with the trim set to different

angles to find the position that works best for

your boat and operating conditions.

EMU27911

Adjusting boat trim

When the boat is on plane, a bow-up attitude

results in less drag, greater stability and effi-

ciency. This is generally when the keel line of

the boat is up about 3 to 5 degrees. With the

bow up, the boat may have a greater tenden-

cy to steer to one side or the other. Compen-

sate for this as you steer. The trim tab can

also be adjusted to help offset this effect.

When the bow of the boat is down, it is easier

to accelerate from a standing start onto

plane.

Bow Up

Too much trim-out puts the bow of the boat

too high in the water. Performance and econ-

omy are decreased because the hull of the

boat is pushing the water and there is more

air drag. Excessive trim-out can also cause

the propeller to ventilate, which reduces per-

formance further, and the boat may “por-

poise” (hop in the water), which could throw

the operator and passengers overboard.

1. Power trim and tilt switch

ZMU06495

Operation

Bow Down

Too much trim-in causes the boat to “plow”

through the water, decreasing fuel economy

and making it hard to increase speed. Oper-

ating with excessive trim-in at higher speeds

also makes the boat unstable. Resistance at

the bow is greatly increased, heightening the

danger of “bow steering” and making opera-

tion difficult and dangerous.

IP:

Depending on the type of boat, the outboard

motor trim angle may have little effect on the

trim of the boat when operating.

EMU27934

Tilting up and down

If the engine will be stopped for some time or

if the boat is moored in shallows, the out-

board motor should be tilted up to protect the

propeller and lower casing from damage by

collision with obstructions, and also to re-

duce salt corrosion.

WARNING

EWM00221

Be sure all people are clear of the out-

board motor when tilting up and down,

Body parts can be crushed between the

motor and the clamp bracket when the

motor is trimmed or tilted.

WARNING

EWM00250

Leaking fuel is a fire hazard. If there is a

fuel joint on the outboard motor, discon-

nect the fuel line or close the fuel cock if

the engine will be tilted for more than a

few minutes. Otherwise fuel may leak.

NOTICE

ECM00241

●

Before tilting the outboard motor, stop

the engine by following the procedure

on page 58. Never tilt the outboard mo-

tor while the engine is running. Severe

damage from overheating can result.

●

Do not tilt up the engine by pushing the

tiller handle (if equipped) because this

could break the handle.

EMU2797B

Procedure for tilting up (manual tilt

models)

1. Place the remote control lever / gear

shift lever in neutral.

ZMU03087

Operation

2. Disconnect the fuel line from the out-

board motor.

3. Place the tilt lock lever (if equipped) in

the release/up position.

4. Pull up the shallow water lever (if

equipped).

5. Hold the rear of the top cowling with one

hand and tilt the engine up fully.

6. Push the tilt support knob into the clamp

bracket. Or the tilt support bar will turn to

the lock position automatically.

NOTICE:

Do not use the tilt support

lever or knob when trailering the

boat. The outboard motor could

shake loose from the tilt support and

fall. If the motor cannot be trailered in

the normal running position, use an

additional support device to secure it

in the tilt position. For more detailed

information, see page 69.

[ECM01641]

EMU32723

Procedure for tilting up (power trim

and tilt models)

1. Place the remote control lever / gear

shift lever in neutral.

ZMU06521

ZMU06533

ZMU06539

ZMU06503

ZMU03196

Operation

2. Press the power trim and tilt switch “”

(up) until the outboard motor has tilted

up completely.

3. Push the tilt support knob into the clamp

bracket to support the engine.

WARNING! After tilting the outboard

motor, be sure to support it with the

tilt support knob or tilt support lever.

Otherwise the outboard motor could

fall back down suddenly if oil in the

power trim and tilt unit or in the pow-

er tilt unit loses pressure.

[EWM00262]

NOTICE:

Do not use the tilt support

lever or knob when trailering the

boat. The outboard motor could

shake loose from the tilt support and

fall. If the motor cannot be trailered in

the normal running position, use an

additional support device to secure it

in the tilt position. For more detailed

information, see page 69.

[ECM01641]

4. Models equipped with trim rods: Once

the outboard motor is supported with the

tilt support lever, press the power trim

ZMU06537

ZMU06543

Operation

and tilt switch “” (down) to retract the

trim rods.

NOTICE:

Be sure to retract

the trim rods completely during

mooring. This protects the rods from

marine growth and corrosion which

could damage the power trim and tilt

mechanism.

[ECM00251]

EMU30192

Procedure for tilting down (manual

tilt models)

1. Place the tilt lock lever in the lock posi-

tion.

2. Slightly tilt the engine up until the tilt sup-

port bar is automatically released.

3. Slowly tilt the engine down.

EMU33120

Procedure for tilting down (power

trim and tilt models)

1. Push the power trim and tilt switch “”

(up) until the outboard motor is support-

ed by the tilt rod and the tilt support knob

becomes free.

2. Pull out the tilt support knob.

3. Push the power trim and tilt switch “”

(down) to lower the outboard motor to

the desired position.

ZMU02306

ZMU06545

ZMU01936

ZMU06546

Operation

EMU28061

Shallow water

EMU28073

Cruising in shallow water (manual tilt

models)

WARNING

EWM01781

●

Run the boat at the lowest possible

speed when using the shallow water

cruising system. The tilt lock mecha-

nism does not work while the shallow

water cruising system is being used.

Hitting an underwater obstacle could

cause the outboard motor to lift out of

the water, resulting in loss of control.

●

Use extra care when operating in re-

verse. Too much reverse thrust can

cause the outboard motor to lift out of

the water, increasing the chance of ac-

cident and personal injury.

NOTICE

ECM00260

Do not tilt the outboard motor up so that

the cooling water inlet on the lower unit is

above the surface of the water when set-

ting up for and cruising in shallow water.

Otherwise severe damage from overheat-

ing can result.

EMU28125

Procedure

1. Place the remote control lever / gear

shift lever in neutral.

2. Place the tilt lock lever in the release/up

position.

ZMU03087

ZMU06521

Operation

3. Slightly tilt the outboard motor up. The

tilt support bar will lock automatically,

supporting the outboard motor in a par-

tially raised position. This outboard mo-

tor has 2 positions for shallow water

cruising.

4. To return the outboard motor to the nor-

mal running position, place the remote

control lever / gear shift lever in neutral.

5. Place the tilt lock lever in the lock/down

position, then slightly tilt the outboard

motor up until the tilt support bar auto-

matically returns to the free position.

6. Slowly lower the outboard motor to the

normal position.

EMU32851

Power trim and tilt models

The outboard motor can be tilted up partially

to allow operation in shallow water.

NOTICE

ECM00260

Do not tilt the outboard motor up so that

the cooling water inlet on the lower unit is

above the surface of the water when set-

ting up for and cruising in shallow water.

Otherwise severe damage from overheat-

ing can result.

EMU32912

Procedure for power trim and tilt models

1. Place the remote control lever / gear

shift lever in neutral.

ZMU06539

ZMU04851

ZMU02306

Operation

2. Slightly tilt the outboard motor up to the

desired position using the power trim

and tilt switch.

WARNING! Using the

power trim and tilt switch on the bot-

tom cowling while the boat is moving

or engine is on could increase the

risk of falling overboard and could

distract the operator, increasing the

risk of collision with another boat or

an obstacle.

[EWM01850]

3. To return the outboard motor to the nor-

mal running position, press the power

trim and tilt switch and slowly tilt the out-

board motor down.

EMU28195

Cruising in other conditions

Cruising in salt water

After operating in salt water, flush the cooling

water passages with fresh water to prevent

them from becoming clogged. Also rinse the

outside of the outboard motor with fresh wa-

ter.

Cruising in muddy, turbid, or acidic water

Yamaha strongly recommends that you use

the optional chromium-plated water pump kit

(see page 19) if you use the outboard motor

in acidic water or water with a lot of sediment

in it, such as muddy or turbid (cloudy) water.

After operating in such water, flush the cool-

ing passages with fresh water to prevent cor-

rosion. Also rinse the outside of the outboard

motor with fresh water.

ZMU01935

ZMU06537

Maintenance

EMU28227

Transporting and storing

outboard motor

WARNING

EWM00693

●

USE CARE when transporting fuel tank,

whether in a boat or car.

●

DO NOT fill fuel container to maximum

capacity. Gasoline will expand consid-

erably as it warms up and can build up

pressure in the fuel container. This can

cause fuel leakage and a potential fire

hazard.

WARNING

EWM01860

Leaking fuel is a fire hazard. When trans-

porting and storing the outboard motor,

close the fuel cock to prevent fuel from

leaking. Never get under the engine while

it is tilted. Severe injury could occur if the

outboard motor accidentally falls.

NOTICE

ECM00660

Do not use the tilt support lever or knob

when trailering the boat. The outboard

motor could shake loose from the tilt sup-

port and fall. If the motor cannot be trail-

ered in the normal running position, use

an additional support device to secure it

in the tilt position.

The outboard motor should be trailered and

stored in the normal running position. If there

is insufficient road clearance in this position,

then trailer the outboard motor in the tilt po-

sition using a motor support device such as

a transom saver bar. Consult your Yamaha

dealer for further details.

EMU28235

Clamp screw mounting models

When transporting or storing the outboard

motor while removed from a boat, keep the

outboard motor in the attitude shown.

IP:

Place a towel or something similar under the

outboard motor to protect it from damage.

EMU28241

Storing outboard motor

When storing your Yamaha outboard motor

for prolonged periods of time (2 months or

longer), several important procedures must

be performed to prevent excessive damage.

It is advisable to have your outboard motor

serviced by an authorized Yamaha dealer

prior to storage. However, you, the owner,

with a minimum of tools, can perform the fol-

lowing procedures.

NOTICE

ECM01080

●

To prevent problems which can be

caused by oil entering the cylinder from

the sump, keep the outboard motor in

the attitude shown when transporting

ZMU06560

Maintenance

and storing it. If storing or transporting

the outboard motor on its side (not up-

right), put it on a cushion after draining

the engine oil.

●

Do not place the outboard motor on its

side before the cooling water has

drained from it completely, otherwise

water may enter the cylinder through

the exhaust port and cause engine trou-

ble.

●

Store the outboard motor in a dry, well-

ventilated place, not in direct sunlight.

EMU28304

Procedure

EMU39020

Flushing in a test tank

NOTICE

ECM02130

Do not run the engine without supplying

it with cooling water. Either the engine

water pump will be damaged or the en-

gine will be damaged from overheating.

Cooling system flushing is essential to pre-

vent the cooling system from clogging up

with salt, sand, or dirt. In addition, fogging of

the engine is mandatory to prevent exces-

sive engine damage due to rust. Perform the

flushing and fogging at the same time.

1. Wash the outboard motor body using

fresh water.

NOTICE:

Do not spray wa-

ter into the air intake.

[ECM01840]

For fur-

ther information, see page 72.

2. Disconnect the fuel line from the out-

board motor.

3. Remove the engine top cowling and pro-

peller. For further details, see page 82.

4. Install the outboard motor on a water

tank. Fill the tank with fresh water until

the anti-cavitation plate is immersed in

water.

NOTICE:

If the fresh water level

is below the level of the anti-cavita-

tion plate, or if the water supply is in-

sufficient, engine seizure may occur.

[ECM00291]

5. Run the engine at a fast idle for 10–15

minutes in neutral position.

WARNING!

Do not touch or remove electrical

parts when starting or during opera-

tion. Keep hands, hair, and clothes

away from the flywheel and other ro-

tating parts while the engine is run-

ning.

[EWM00091]

6. Just prior to turning off the engine, quick-

ly spray “Yamaha Stor-Rite Engine

Fogging Oil” alternately into the silencer

cover. When properly done, the engine

will smoke excessively and almost stall.

ZMU03659

1. Water surface

2. Lowest water level

ZMU02051

Maintenance

7. Remove the outboard motor from the

test tank.

8. Drain the cooling water completely out

of the motor. Clean the body thoroughly.

9. Install the top cowling.

10. Fill the fuel tank with fresh fuel and add

one ounce of “Yamaha Fuel Conditioner

and Stabilizer” to each gallon of fuel.

IP:

The use of “Yamaha Fuel Conditioner and

Stabilizer” eliminates the need to drain the

fuel system. Consult your Yamaha dealer or

other qualified mechanic if the fuel system is

to be drained instead.

11. Store the fuel tank in a dry, well-ventilat-

ed place, not in direct sunlight.

EMU28402

Lubrication

1. Install the spark plug(s) and torque to

proper specification. For information on

spark plug installation, see page 78.

2. Change the gear oil. For instructions,

see page 84. Inspect the oil for the pres-

ence of water that indicates a leaky seal.

Seal replacement should be performed

by an authorized Yamaha dealer prior to

use.

3. Grease all grease fittings. For further de-

tails, see page 77.

IP:

For long-term storage, fogging the engine

with oil is recommended. Contact your

Yamaha dealer for information about fogging

oil and procedures for your engine.

EMU28423

Cleaning and anticorrosion

measures

1. Wash down the exterior of the outboard

motor with fresh water and dry off com-

pletely.

NOTICE:

Do not spray water

into the air intake.

[ECM01840]

2. Spray the outboard motor exterior with

“Yamaha Silicone Protectant”.

3. Wax the cowling with a non-abrasive

wax such as “Yamaha Silicone Wax”.

EMU28443

Flushing power unit

Perform this procedure right after operation

for the most thorough flushing.

NOTICE

ECM01530

Do not perform this procedure while the

engine is running. The water pump may

be damaged and severe damage from

overheating can result.

1. After shutting off the engine, unscrew

the garden hose connector from the fit-

ting on the bottom cowling.

ZMU06571

Maintenance

2. Screw the garden hose adapter onto a

garden hose, which is connected to a

fresh water supply, and then connect it

to the garden hose connector.

3. With the engine off, turn on the water tap

and let the water flush through the cool-

ing passages for about 15 minutes. Turn

off the water and disconnect the garden

hose adapter from the garden hose con-

nector.

4. Reinstall the garden hose connector

onto the fitting on the bottom cowling.

Tighten the connector securely.

NOTICE:

Do not leave the garden

hose connector loose on the bottom

cowling fitting or let the hose hang

free during normal operation. Water

will leak out of the connector instead

of cooling the engine, which can

cause serious overheating. Be sure

the connector is tightened securely

on the fitting after flushing the en-

gine.

[ECM00541]

IP:

●

When flushing the engine with the boat in

the water, tilting up the outboard motor un-

til it is completely out of the water will

achieve better results.

●

For cooling system flushing instructions,

see page 69.

EMU28451

Cleaning the outboard motor

After use, wash the exterior of the outboard

motor with fresh water. Flush the cooling

system with fresh water.

EMU28460

Checking painted surface of motor

Check the motor for scratches, nicks, or flak-

ing paint. Areas with damaged paint are

more likely to corrode. If necessary, clean

and paint the areas. A touch-up paint is avail-

able from your Yamaha dealer.

EMU2848A

Periodic maintenance

WARNING

EWM01871

These procedures require mechanical

skills, tools, and supplies. If you do not

have the proper skills, tools, or supplies

to perform a maintenance procedure,

1. Fitting

2. Garden hose connector

3. Garden hose adapter

ZMU06553

Maintenance

have a Yamaha dealer or other qualified

mechanic do the work.

The procedures involve disassembling

the motor and exposing dangerous parts.

To reduce the risk of injury from moving,

hot, or electrical parts:

●

Turn off the engine and keep the key(s)

and engine shut-off cord (lanyard) with

you when you perform maintenance

unless otherwise specified.

●

The power trim and tilt switches oper-

ate even when the ignition key is off.

Keep people away from the switches

whenever working around the motor.

When the motor is tilted, keep away

from the area under it or between it and

the clamp bracket. Be sure no one is in

this area before operating the power

trim and tilt mechanism.

●

Allow the engine to cool before han-

dling hot parts or fluids.

●

Always completely reassemble the mo-

tor before operation.

Maintenance, replacement, or repair of

the emission control devices and sys-

tems may be performed by any marine

engine repair establishment or individual.

All warranty repairs, however, including

those to the emission control system,

must be performed by an authorized

Yamaha marine dealership.

A service manual is available for purchase

through your Yamaha dealer for owners who

have the mechanical skills, tools, and other

equipment necessary to perform mainte-

nance not covered by this owner’s manual.

EMU28511

Replacement parts

If replacement parts are necessary, use only

genuine Yamaha parts or parts of equivalent

design and quality. Any part of inferior quality

may malfunction, and the resulting loss of

control could endanger the operator and

passengers. Yamaha genuine parts and ac-

cessories are available from your Yamaha

dealer.

EMU35520

Maintenance interval guidelines

The service intervals provided in the Mainte-

nance Chart were developed based upon

“typical” use that includes operating at varied

speeds, with sufficient time for engine warm

up and cool-down, a medium to light load,

and an average cruising speed near the

3000 to 4000 rpm range. As with any engine,

however, if your normal operating conditions

are different, you should consider service

more often than shown, especially how often

you change your engine and gear oil. Exam-

ples might include extended wide-open-

throttle use or long periods of trolling or

idling, carrying heavy loads, or frequent

starting and stopping or shifting. More fre-

quent maintenance will often pay off many

times over in increased engine life and great-

er owner satisfaction. Consult your Yamaha

dealer for additional maintenance recom-

mendations.

Maintenance

EMU34445

Maintenance chart 1

IP:

●

Refer to the sections in this chapter for explanations of each owner-specific action.

●

The maintenance cycle on these charts assume usage of 100 hours per year and regular

flushing of the cooling water passages. Maintenance frequency should be adjusted when

operating the engine under adverse conditions such as extended trolling.

●

Disassembly or repairs may be necessary depending on the outcome of maintenance

checks.

●

Expendable or consumable parts and lubricants will lose their effectiveness over time and

through normal usage regardless of the warranty period.

●

When operating in salt water, muddy, other turbid (cloudy), acidic water, the engine should

be flushed with clean water after each use.

The “” symbol indicates the check-ups which you may carry out yourself.

The “” symbol indicates work to be carried out by your Yamaha dealer.

Item Actions

Initial Every

20 hours

months)

100

hours

(1 year)

300

hours

(3 years)

500

hours

(5 years)

Anode(s) (external) Inspection or replace-

ment as necessary

Anode(s) (cylinder

head)

Inspection or replace-

ment as necessary

Anodes (exhaust cover,

exhaust guide) Replacement

Battery (electrolyte

level, terminal) Inspection

Battery (electrolyte

level, terminal)

Fill, charging or replac-

ing as necessary

Cooling water leakage Inspection or replace-

ment as necessary

Cowling lock lever Inspection

Engine starting condi-

tion/noise Inspection

Engine idling speed/

noise Inspection

Engine oil Replacement

Engine oil ﬁlter (car-

tridge) Replacement

Fuel ﬁlter (can be dis-

assembled)

Inspection or replace-

ment as necessary

Fuel line(Low pres-

sure) Inspection

Maintenance

Fuel line(Low pres-

sure)

Inspection or replace-

ment as necessary

Fuel pump Inspection or replace-

ment as necessary

Fuel/engine oil leakage Inspection

Gear oil Replacement

Greasing points Greasing

Impeller/water pump

housing

Inspection or replace-

ment as necessary

Impeller/water pump

housing Replacement

Power trim and tilt unit Inspection

Propeller/propeller nut/

cotter pin

Inspection or replace-

ment as necessary

Shift link/shift cable

Inspection, adjustment

or replacement as nec-

essary

Spark plug(s) Inspection or replace-

ment as necessary

Spark plug caps/spark

plug wires

Inspection or replace-

ment as necessary

Water from the cooling

water pilot hole Inspection

Throttle link/throttle

cable/throttle pick-up

timing

Inspection, adjustment

or replacement as nec-

essary

Thermostat Inspection or replace-

ment as necessary

Timing belt Inspection or replace-

ment as necessary

Valve clearance Inspection and adjust-

ment

Water inlet Inspection

Main switch/stop

switch

Inspection or replace-

ment as necessary

Wire harness connec-

tions/wire coupler con-

nections

Inspection or replace-

ment as necessary

Item Actions

Initial Every

20 hours

months)

100

hours

(1 year)

300

hours

(3 years)

500

hours

(5 years)

Maintenance

EMU34451

Maintenance chart 2

EMU28910

IP:

When using lead or high-sulfur gasoline, inspecting valve clearance may be required more

frequently than every 500 hours.

(Yamaha) Fuel tank Inspection and clean-

ing as necessary

Item Actions Every

1000 hours

Exhaust guide/exhaust

manifold

Inspection or replace-

ment as necessary

Timing belt Replacement

Item Actions

Initial Every

20 hours

months)

100

hours

(1 year)

300

hours

(3 years)

500

hours

(5 years)

Maintenance

EMU28932

Greasing

Yamaha marine grease (Water resistant grease)

F25A, F25EA, T25A

ZMU06567

Maintenance

F25EHA, F25MHA

EMU28956

Cleaning and adjusting spark plug

The spark plug is an important engine com-

ponent and is easy to inspect. The condition

of the spark plug can indicate something

about the condition of the engine. For exam-

ple, if the center electrode porcelain is very

white, this could indicate an intake air leak or

carburetion problem in that cylinder. Do not

attempt to diagnose any problems yourself.

Instead, take the outboard motor to a

Yamaha dealer. You should periodically re-

ZMU06554

Maintenance

move and inspect the spark plug because

heat and deposits will cause the spark plug

to slowly break down and erode.

1. Remove the spark plug caps from the

spark plugs.

2. Remove the spark plug. If electrode ero-

sion becomes excessive, or if carbon

and other deposits are excessive, you

should replace the spark plug with an-

other of the correct type.

WARNING!

When removing or installing a spark

plug, be careful not to damage the in-

sulator. A damaged insulator could

allow external sparks, which could

lead to explosion or fire.

[EWM00561]

3. Be sure to use the specified spark plug,

otherwise the engine may not operate

properly. Before fitting the spark plug,

measure the electrode gap with a wire

thickness gauge; replace it if out of spec-

ification.

4. When fitting the plug, wipe off any dirt

from the threads, and then screw it in to

the correct torque.

IP:

If a torque-wrench is not available when you

are fitting a spark plug, a good estimate of

the correct torque is 1/4 to 1/2 a turn past fin-

ger-tight. Have the spark plug adjusted to the

correct torque as soon as possible with a

torque-wrench.

EMU37450

Checking fuel filter

Check the fuel filter periodically. If any water

or foreign matter is found in the filter, clean or

replace it. For cleaning or replacement of the

fuel filter, consult your Yamaha dealer.

EMU29043

Inspecting idling speed

WARNING

EWM00451

●

Do not touch or remove electrical parts

when starting or during operation.

●

Keep hands, hair, and clothes away

from the flywheel and other rotating

Standard spark plug:

DPR6EB-9

1. Spark plug gap

2. Spark plug I.D. mark (NGK)

3. Spark plug part number

Spark plug gap:

0.8–0.9 mm (0.031–0.035 in)

Spark plug torque:

17.0 Nm (1.73 kgf-m, 12.5 ft-lb)

ZMU06513

Maintenance

parts while the engine is running.

NOTICE

ECM00490

This procedure must be performed while

the outboard motor is in the water. A

flushing attachment or test tank can be

used.

If the boat is not equipped with a tachometer

for the outboard motor, use a diagnostic ta-

chometer for this procedure. Results may

vary depending on whether testing is con-

ducted with the flushing attachment, in a test

tank, or with the outboard motor in the water.

1. Start the engine and allow it to warm up

fully in neutral until it is running smooth-

ly.

2. Once the engine has warmed up, verify

whether the idle speed is set to specifi-

cation. For idle speed specifications,

see page 14. If you have difficulty verify-

ing the idle speed, or the idle speed re-

quires adjustment, consult a Yamaha

dealer or other qualified mechanic.

EMU38802

Changing engine oil

NOTICE

ECM01710

Change the engine oil after the first 20

hours of operation or 3 months, and ev-

ery 100 hours or at 1-year intervals there-

after. Otherwise the engine will wear

quickly.

Extract the engine oil with an oil changer.

1. Put the outboard motor in an upright po-

sition (not tilted).

NOTICE:

If the motor

is not level, the oil level indicated on

the dipstick may not be accurate.

[ECM01860]

2. Start the engine. Warm it up and keep

the idle speed for 5-10 minutes.

3. Stop the engine and leave it for 5-10

minutes.

4. Remove the top cowling.

5. Remove the oil filler cap. Pull out the dip-

stick and use the oil changer to extract

the oil completely.

IP:

If the oil changer is not available, remove the

drain screw while holding a container under

the drain hole. Let the oil drain completely.

Wipe up any spilled oil immediately.

1. Oil changer

ZMU03659

ZMU06591

Maintenance

6. Add the correct amount of oil through the

filler hole. Put back the filler cap and the

dipstick.

NOTICE:

Overfilling the oil

could cause leakage or damage. If the

oil level is above the upper level

mark, drain until the level meets the

specified capacity.

[ECM01850]

7. Leave the outboard motor for 5-10 min-

utes.

8. Remove oil dipstick and wipe it clean.

9. Insert the dipstick and remove it again.

Be sure to completely insert the dipstick

into the dipstick guide, otherwise the oil

level measurement will be incorrect.

10. Recheck the oil level using the dipstick

to be sure the level falls between the up-

per and lower marks. Consult your

Yamaha dealer if the oil level is out of

specified level.

11. Start the engine and make sure that the

low oil pressure-alert indicator remains

off. Also, make sure that there are no oil

leaks.

NOTICE:

If the low oil pressure-

alert indicator comes on or if there

are oil leaks, stop the engine and find

the cause. Continued operation with

a problem could cause severe engine

damage. Consult your Yamaha dealer

if the problem cannot be located and

corrected.

[ECM01622]

12. Dispose of used oil according to local

regulations.

IP:

●

For more information on the disposal of

used oil, consult your Yamaha dealer.

1. Drain screw

1. Oil ﬁller cap

Recommended engine oil:

4-stroke outboard motor oil

Total engine oil quantity (oil pan capaci-

ty):

Without oil filter replacement:

1.4 L (1.48 US qt, 1.23 Imp.qt)

With oil filter replacement:

1.6 L (1.69 US qt, 1.41 Imp.qt)

ZMU06610

ZMU06561

1. Oil dipstick

2. Lower level mark

3. Upper level mark

ZMU06516

Maintenance

●

Change the oil more often when operating

the engine under adverse conditions such

as extended trolling.

EMU29113

Checking wiring and connectors

●

Check that each connector is engaged se-

curely.

●

Check that each ground lead is properly

secured.

EMU32112

Checking propeller

WARNING

EWM01881

You could be seriously injured if the en-

gine accidentally starts when you are

near the propeller. Before inspecting, re-

moving, or installing the propeller, place

the shift control in neutral, turn the main

switch to “” (off) and remove the key,

and remove the clip from the engine shut-

off switch. Turn off the battery cut-off

switch if your boat has one.

Do not use your hand to hold the propeller

when loosening or tightening the propeller

nut. Put a wood block between the anti-cavi-

tation plate and the propeller to prevent the

propeller from turning.

Checkpoints

●

Check each of the propeller blades for ero-

sion from cavitation or ventilation, or other

damage.

●

Check the propeller shaft for damage.

●

Check the splines for wear or damage.

●

Check for fish line tangled around the pro-

peller shaft.

●

Check the propeller shaft oil seal for dam-

age.

EMU30662

Removing propeller

EMU29197

Spline models

1. Straighten the cotter pin and pull it out

ZMU06562

ZMU01897

Maintenance

using a pair of pliers.

2. Remove the propeller nut, washer, and

spacer (if equipped).

WARNING! Do

not use your hand to hold the propel-

ler when loosening the propeller nut.

[EWM01890]

3. Remove the propeller, washer (if

equipped), and thrust washer.

EMU30672

Installing propeller

EMU29233

Spline models

NOTICE

ECM00500

Be sure to use a new cotter pin and bend

the ends over securely. Otherwise the

propeller could come off during opera-

tion and be lost.

1. Apply Yamaha marine grease or a cor-

rosion resistant grease to the propeller

shaft.

2. Install the spacer (if equipped), thrust

washer, washer (if equipped), and pro-

peller on the propeller shaft.

NOTICE:

Be sure to install the thrust washer

before installing the propeller, other-

wise the lower case and propeller

boss could be damaged.

[ECM01880]

3. Install the spacer (if equipped) and the

washer. Tighten the propeller nut to the

specified torque.

4. Align the propeller nut with the propeller

shaft hole. Insert a new cotter pin in the

hole and bend the cotter pin ends.

NOTICE:

Do not reuse the cotter pin

installed. Otherwise the propeller can

come off during operation.

[ECM01890]

1. Cotter pin

2. Propeller nut

3. Washer

4. Spacer

5. Propeller

6. Thrust washer

1. Cotter pin

2. Propeller nut

3. Washer

4. Propeller

5. Thrust washer

ZMU06564

432

ZMU06603

Propeller nut tightening torque:

35.0 Nm (3.57 kgf-m, 25.8 ft-lb)

Maintenance

IP:

If the propeller nut does not align with the

propeller shaft hole after tightening to the

specified torque, tighten the nut further to

align it with the hole.

EMU29287

Changing gear oil

WARNING

EWM00800

●

Be sure the outboard motor is securely

fastened to the transom or a stable

stand. You could be severely injured if

the outboard motor falls on you.

●

Never get under the lower unit while it

is tilted, even when the tilt support lever

or knob is locked. Severe injury could

occur if the outboard motor accidental-

ly falls.

1. Tilt the outboard motor so that the gear

oil drain screw is at the lowest point pos-

sible.

2. Place a suitable container under the

gear case.

3. Remove the gear oil drain screw and

gasket.

NOTICE:

If there is an exces-

sive quantity of metal particles on the

magnetic gear oil drain screw, this

can indicate lower unit problem. Con-

sult your Yamaha dealer.

[ECM01900]

IP:

●

If a magnetic gear oil drain screw is

equipped, remove all metal particles from

the screw before installing it.

●

Always use new gaskets. Do not reuse the

removed gaskets.

4. Remove the oil level plug and gasket to

allow the oil to drain completely.

NOTICE:

Inspect the used oil after it

has been drained. If the oil is milky,

water is getting into the gear case

which can cause gear damage. Con-

sult a Yamaha dealer for repair of the

lower unit seals.

[ECM00711]

IP:

For disposal of used oil, consult your

Yamaha dealer.

5. Put the outboard motor in a vertical po-

sition. Using a flexible or pressurized fill-

ing device, inject the gear oil into the

gear oil drain screw hole.

ZMU02063

1. Gear oil drain screw

2. Oil level plug

ZMU03273

Maintenance

6. Put a new gasket on the oil level plug.

When the oil begins to flow out of the oil

level plug hole, insert and tighten the oil

level plug.

7. Put a new gasket on the gear oil drain

screw. Insert and tighten the gear oil

drain screw.

EMU29302

Cleaning fuel tank

WARNING

EWM00920

Gasoline is highly flammable, and its va-

pors are flammable and explosive.

●

If you have any question about properly

doing this procedure, consult your

Yamaha dealer.

●

Keep away from sparks, cigarettes,

flames, or other sources of ignition

when cleaning the fuel tank.

●

Remove the fuel tank from the boat be-

fore cleaning it. Work only outdoors in

an area with good ventilation.

●

Wipe up any spilled fuel immediately.

●

Reassemble the fuel tank carefully. Im-

proper assembly can result in a fuel

leak, which could result in a fire or ex-

plosion hazard.

●

Dispose of old gasoline according to lo-

cal regulations.

1. Empty the fuel tank into an approved

container.

2. Pour a small amount of suitable solvent

into the tank. Install the cap and shake

the tank. Drain the solvent completely.

3. Remove the screws holding the fuel joint

assembly. Pull the assembly out of the

tank.

4. Clean the filter (located on the end of the

Recommended gear oil:

Hypoid gear oil SAE#90

Gear oil quantity:

F25A 0.320 L

(0.338 US qt, 0.282 Imp.qt)

F25EA 0.320 L

(0.338 US qt, 0.282 Imp.qt)

F25EHA 0.320 L

(0.338 US qt, 0.282 Imp.qt)

F25MHA 0.320 L

(0.338 US qt, 0.282 Imp.qt)

T25A 0.430 L

(0.455 US qt, 0.378 Imp.qt)

Tightening torque:

9 Nm (0.9 kgf-m, 6.6 ft-lb)

Tightening torque:

9 Nm (0.9 kgf-m, 6.6 ft-lb)

ZMU03274

ZMU02324

Maintenance

suction pipe) in a suitable cleaning sol-

vent. Allow the filter to dry.

5. Replace the gasket with a new one. Re-

install the fuel joint assembly and tighten

the screws firmly.

EMU29312

Inspecting and replacing anode(s)

Yamaha outboard motors are protected from

corrosion by sacrificial anodes. Inspect the

external anodes periodically. Remove scales

from the surfaces of the anodes. Consult a

Yamaha dealer for replacement of external

anodes.

NOTICE

ECM00720

Do not paint anodes, as this would render

them ineffective.

IP:

Inspect ground leads attached to external

anodes on equipped models. Consult a

Yamaha dealer for inspection and replace-

ment of internal anodes attached to the pow-

er unit.

EMU29322

Checking battery (for electric start

models)

WARNING

EWM01900

Battery electrolytic fluid is poisonous

and caustic, and batteries generate ex-

plosive hydrogen gas. When working

near the battery:

●

Wear protective eye gear and rubber

ZMU06559

ZMU03664

ZMU02924

ZMU05024

Maintenance

gloves.

●

Do not smoke or bring any other source

of ignition near the battery.

Refer to page 16 for detailed safety infor-

mation about batteries.

The procedure for checking the battery var-

ies for different batteries. This procedure

contains typical checks that apply to many

batteries, but you should always refer to the

battery manufacturer’s instructions.

NOTICE

ECM01920

A poorly maintained battery will quickly

deteriorate.

1. Check the electrolyte level.

2. Check the battery’s charge. If your boat

is equipped with the digital speedome-

ter, the voltmeter and low battery alert

functions will help you monitor the bat-

tery’s charge. If the battery needs charg-

ing, consult your Yamaha dealer.

3. Check the battery connections. They

should be clean, secure, and covered by

an insulating cover.

WARNING! Bad

connections can produce shorting or

arcing and cause an explosion.

[EWM01910]

EMU29333

Connecting the battery

WARNING

EWM00570

Mount the battery holder securely in a

dry, well-ventilated, vibration-free loca-

tion in the boat. Install a fully charged bat-

tery in the holder.

NOTICE

ECM01123

Reversal of the battery cables will dam-

age the electrical parts.

1. Make sure the main switch (on applica-

ble models) is “” (off) before working

on the battery.

2. Connect the red battery cable to the

POSITIVE (+) terminal first. Then con-

nect the black battery cable to the NEG-

ATIVE (-) terminal.

3. The electrical contacts of the battery and

cables must be clean and properly con-

nected, or the battery will not start the

engine.

EMU29371

Disconnecting the battery

1. Turn off the battery cut-off switch (if

equipped) and main switch.

NOTICE:

1. Red cable

2. Black cable

3. Battery

Maintenance

they are left on, the electrical system

can be damaged.

[ECM01930]

2. Disconnect the negative cable(s) from

the negative (-) terminal.

NOTICE:

Al-

ways disconnect all negative (-) ca-

bles first to avoid a short circuit and

damage to the electrical system.

[ECM01940]

3. Disconnect the positive cable(s) and re-

move the battery from the boat.

4. Clean, maintain, and store the battery

according to the manufacturer’s instruc-

tions.

Trouble Recovery

EMU29427

Troubleshooting

A problem in the fuel, compression, or igni-

tion systems can cause poor starting, loss of

power, or other problems. This section de-

scribes basic checks and possible remedies,

and covers all Yamaha outboard motors.

Therefore some items may not apply to your

model.

If your outboard motor requires repair, bring

it to your Yamaha dealer.

If the engine trouble-alert indicator is flash-

ing, consult your Yamaha dealer.

Starter will not operate.

Q. Is battery capacity weak or low?

A. Check battery condition. Use battery of

recommended capacity.

Q. Are battery connections loose or corrod-

ed?

A. Tighten battery cables and clean battery

terminals.

Q. Is fuse for electric start relay or electric cir-

cuit blown?

A. Check for cause of electric overload and

repair. Replace fuse with one of correct am-

perage.

Q. Are starter components faulty?

A. Have serviced by a Yamaha dealer.

Q. Is shift lever in gear?

A. Shift to neutral.

Engine will not start (starter operates).

Q. Is fuel tank empty?

A. Fill tank with clean, fresh fuel.

Q. Is fuel contaminated or stale?

A. Fill tank with clean, fresh fuel.

Q. Is fuel filter clogged?

A. Clean or replace filter.

Q. Is starting procedure incorrect?

A. See page 49.

Q. Has fuel pump malfunctioned?

A. Have serviced by a Yamaha dealer.

Q. Are spark plug(s) fouled or of incorrect

type?

A. Inspect spark plug(s). Clean or replace

with recommended type.

Q. Are spark plug cap(s) fitted incorrectly?

A. Check and re-fit cap(s).

Q. Is ignition wiring damaged or poorly con-

nected?

A. Check wires for wear or breaks. Tighten

all loose connections. Replace worn or bro-

ken wires.

Q. Are ignition parts faulty?

A. Have serviced by a Yamaha dealer.

Q. Is engine shut-off cord (lanyard) not at-

tached?

A. Attach cord.

Q. Are engine inner parts damaged?

A. Have serviced by a Yamaha dealer.

Engine idles irregularly or stalls.

Q. Are spark plug(s) fouled or of incorrect

type?

A. Inspect spark plug(s). Clean or replace

with recommended type.

Trouble Recovery

Q. Is fuel system obstructed?

A. Check for pinched or kinked fuel line or

other obstructions in fuel system.

Q. Is fuel contaminated or stale?

A. Fill tank with clean, fresh fuel.

Q. Is fuel filter clogged?

A. Clean or replace filter.

Q. Have ignition parts failed?

A. Have serviced by a Yamaha dealer.

Q. Has alert system activated?

A. Find and correct cause of alert.

Q. Is spark plug gap incorrect?

A. Inspect and adjust as specified.

Q. Is ignition wiring damaged or poorly con-

nected?

A. Check wires for wear or breaks. Tighten

all loose connections. Replace worn or bro-

ken wires.

Q. Is specified engine oil not being used?

A. Check and replace oil as specified.

Q. Is thermostat faulty or clogged?

A. Have serviced by a Yamaha dealer.

Q. Are carburetor adjustments incorrect?

A. Have serviced by a Yamaha dealer.

Q. Is fuel pump damaged?

A. Have serviced by a Yamaha dealer.

Q. Is air vent screw on fuel tank closed?

A. Open air vent screw.

Q. Is choke knob pulled out?

A. Return to home position.

Q. Is motor angle too high?

A. Return to normal operating position.

Q. Is carburetor clogged?

A. Have serviced by a Yamaha dealer.

Q. Is fuel joint connection incorrect?

A. Connect correctly.

Q. Is throttle valve adjustment incorrect?

A. Have serviced by a Yamaha dealer.

Q. Is battery cable disconnected?

A. Connect securely.

Alert buzzer sounds or indicator lights.

Q. Is cooling system clogged?

A. Check water intake for restriction.

Q. Is engine oil level low?

A. Fill oil tank with specified engine oil.

Q. Is heat range of spark plug incorrect?

A. Inspect spark plug and replace it with rec-

ommended type.

Q. Is specified engine oil not being used?

A. Check and replace oil with specified type.

Q. Is engine oil contaminated or deteriorat-

ed?

A. Replace oil with fresh, specified type.

Q. Is oil filter clogged?

A. Have serviced by a Yamaha dealer.

Q. Has oil feed/injection pump malfunc-

tioned?

A. Have serviced by a Yamaha dealer.

Trouble Recovery

Q. Is load on boat improperly distributed?

A. Distribute load to place boat on an even

plane.

Q. Is water pump or thermostat faulty?

A. Have serviced by a Yamaha dealer.

Q. Is there excess water in fuel filter cup?

A. Drain filter cup.

Engine power loss.

Q. Is propeller damaged?

A. Have propeller repaired or replaced.

Q. Is propeller pitch or diameter incorrect?

A. Install correct propeller to operate out-

board at its recommended speed (r/min)

range.

Q. Is trim angle incorrect?

A. Adjust trim angle to achieve most efficient

operation.

Q. Is motor mounted at incorrect height on

transom?

A. Have motor adjusted to proper transom

height.

Q. Has alert system activated?

A. Find and correct cause of alert.

Q. Is boat bottom fouled with marine growth?

A. Clean boat bottom.

Q. Are spark plug(s) fouled or of incorrect

type?

A. Inspect spark plug(s). Clean or replace

with recommended type.

Q. Are weeds or other foreign matter tangled

on gear housing?

A. Remove foreign matter and clean lower

unit.

Q. Is fuel system obstructed?

A. Check for pinched or kinked fuel line or

other obstructions in fuel system.

Q. Is fuel filter clogged?

A. Clean or replace filter.

Q. Is fuel contaminated or stale?

A. Fill tank with clean, fresh fuel.

Q. Is spark plug gap incorrect?

A. Inspect and adjust as specified.

Q. Is ignition wiring damaged or poorly con-

nected?

A. Check wires for wear or breaks. Tighten

all loose connections. Replace worn or bro-

ken wires.

Q. Have electrical parts failed?

A. Have serviced by a Yamaha dealer.

Q. Is specified fuel not being used?

A. Replace fuel with specified type.

Q. Is specified engine oil not being used?

A. Check and replace oil with specified type.

Q. Is thermostat faulty or clogged?

A. Have serviced by a Yamaha dealer.

Q. Is air vent screw closed?

A. Open the air vent screw.

Q. Is fuel pump damaged?

A. Have serviced by a Yamaha dealer.

Trouble Recovery

Q. Is fuel joint connection incorrect?

A. Connect correctly.

Q. Is heat range of spark plug incorrect?

A. Inspect spark plug and replace it with rec-

ommended type.

Q. Is high pressure fuel pump drive belt bro-

ken?

A. Have serviced by a Yamaha dealer.

Q. Is engine not responding properly to shift

lever position?

A. Have serviced by a Yamaha dealer.

Engine vibrates excessively.

Q. Is propeller damaged?

A. Have propeller repaired or replaced.

Q. Is propeller shaft damaged?

A. Have serviced by a Yamaha dealer.

Q. Are weeds or other foreign matter tangled

on propeller?

A. Remove and clean propeller.

Q. Is motor mounting bolt loose?

A. Tighten bolt.

Q. Is steering pivot loose or damaged?

A. Tighten or have serviced by a Yamaha

dealer.

EMU29433

Temporary action in

emergency

EMU29440

Impact damage

WARNING

EWM00870

The outboard motor can be seriously

damaged by a collision while operating or

trailering. Damage could make the out-

board motor unsafe to operate.

If the outboard motor hits an object in the wa-

ter, follow the procedure below.

1. Stop the engine immediately.

2. Inspect the control system and all com-

ponents for damage. Also inspect the

boat for damage.

3. Whether damage is found or not, return

to the nearest harbor slowly and careful-

ly.

4. Have a Yamaha dealer inspect the out-

board motor before operating it again.

EMU30681

Replacing fuse

If a fuse has blown, open the fuse holder and

remove the fuse with a fuse puller. Replace

it with a spare one of the proper amperage.

WARNING

EWM00631

Substituting an incorrect fuse or a piece

of wire could allow excessive current

flow. This could cause electric system

damage and a fire hazard.

Consult your Yamaha dealer if the new fuse

immediately blows again.

Trouble Recovery

EMU29512

Power trim and tilt will not operate

If the engine cannot be tilted up or down with

the power trim and tilt because of a dis-

charged battery or a failure with the power

trim and tilt unit , the engine can be tilted

manually.

1. Loosen the manual valve screw by turn-

ing it clockwise until it stops.

2. Put the engine in the desired position,

then tighten the manual valve screw by

turning it counterclockwise.

EMU29533

Starter will not operate

If the starter mechanism does not operate

(the engine cannot be cranked with the start-

er), the engine can be started with an emer-

gency starter rope.

WARNING

EWM01022

●

Use this procedure only in an emergen-

cy to return to the nearest port for re-

pairs.

●

When the emergency starter rope is

used to start the engine, the start-in-

gear protection device does not oper-

ate. Make sure the remote control lever

is in neutral. Otherwise the boat could

unexpectedly start to move, which

could result in an accident.

●

Attach the engine shut-off cord to a se-

cure place on your clothing, or your

arm or leg while operating the boat.

●

Do not attach the cord to clothing that

could tear loose. Do not route the cord

where it could become entangled, pre-

venting it from functioning.

●

Avoid accidentally pulling the cord dur-

1. Fuse puller

2. Cap

3. Fuse (20 A, 30 A)

4. Spare fuse (20 A, 30 A)

1. Fuse puller

2. Fuse (20 A, 30 A)

ZMU06565

ZMU03562

1. Manual valve screw

ZMU02816

Trouble Recovery

ing normal operation. Loss of engine

power means the loss of most steering

control. Also, without engine power,

the boat could slow rapidly. This could

cause people and objects in the boat to

be thrown forward.

●

Make sure no one is standing behind

you when pulling the starter rope. It

could whip behind you and injure

someone.

●

An unguarded, rotating flywheel is very

dangerous. Keep loose clothing and

other objects away when starting the

engine. Use the emergency starter rope

only as instructed. Do not touch the fly-

wheel or other moving parts when the

engine is running. Do not install the

starter mechanism or top cowling after

the engine is running.

●

Do not touch the ignition coil, spark

plug wire, spark plug cap, or other elec-

trical components when starting or op-

erating the motor. You could get an

electrical shock.

EMU38840

Emergency starting engine (manual

start model)

1. Remove the top cowling and protective

cover.

2. Remove the grommet and disconnect

the start-in-gear protection cable from

the manual starter.

3. Remove the manual starter after remov-

ing the bolt(s).

ZMU06574

ZMU06577

ZMU6576

ZMU06575

Trouble Recovery

4. Pass the start-in-gear protection cable

under the fuel line and remove the

spring from it.

5. Be sure that the gear shift is in neutral

and that the clip is attached to the en-

gine shut-off switch.

6. Insert the knotted end of the emergency

starter rope into the notch in the flywheel

magnet and wind the rope 1 or 2 turn(s)

around the flywheel magnet clockwise.

7. Pull the rope slowly until resistance is

felt. Give a strong pull straight out to

crank and start the engine. If the engine

does not start on the first try, repeat the

procedure.

IP:

●

If the engine does not start on the first try,

repeat the procedure. If the engine fails to

start after 4 or 5 tries, open the throttle a

small amount (between 1/8 and 1/4) and

try again. Also if the engine is warm and

fails to start, open the throttle a same

amount and try to start the engine again. If

the engine still fails to start, see page 49.

●

Slowly return the throttle grip to the fully

closed position so that the engine does not

stall.

ZMU06579

ZMU06578

ZMU06521

ZMU02026

ZMU06583

Trouble Recovery

EMU38851

Emergency starting engine (electric

start model)

1. Remove the top cowling and protective

cover.

2. Pull off the 10-pin connector from the

clamp and remove the flywheel magnet

cover (if equipped).

3. Remove the flywheel magnet cover after

removing the bolt(s).

4. Be sure that the gear shift is in neutral

and that the clip is attached to the en-

gine shut-off switch. The main switch

must be “” (on), if equipped.

ZMU06585

ZMU06581

ZMU06582

ZMU06521

Trouble Recovery

5. Insert the knotted end of the emergency

starter rope into the notch in the flywheel

magnet and wind the rope 1 or 2 turn(s)

around the flywheel magnet clockwise.

6. Pull the rope slowly until resistance is

felt. Give a strong pull straight out to

crank and start the engine. If the engine

does not start on the first try, repeat the

procedure.

IP:

●

If the engine does not start on the first try,

repeat the procedure. If the engine fails to

start after 4 or 5 tries, open the throttle a

small amount (between 1/8 and 1/4) and

try again. Also if the engine is warm and

fails to start, open the throttle a same

amount and try to start the engine again. If

the engine still fails to start, see page 49.

●

Slowly return the throttle grip to the fully

closed position so that the engine does not

stall.

EMU33501

Treatment of submerged motor

If the outboard motor is submerged, immedi-

ately take it to a Yamaha dealer. Otherwise

some corrosion may begin almost immedi-

ately.

NOTICE:

Do not attempt to run the

outboard motor until it has been com-

pletely inspected.

[ECM00401]

ZMU02026

ZMU06584

Consumer information

EMU29830

YAMAHA MOTOR CORPORATION, U.S.A.

FOUR-STROKE OUTBOARD MOTOR

THREE-YEAR LIMITED WARRANTY

Consumer information

100

EMU29841

IMPORTANT WARRANTY INFORMATION IF YOU USE YOUR

YAMAHA OUTSIDE THE USA OR CANADA

EMU25062

ZMU01690

Read this manual carefully before operating this outboard motor. Keep this

manual onboard in a waterproof bag when boating. This manual should stay

with the outboard motor if it is sold.

6BP-9-11 Hyoshi 背巾4mm 09.2.19 9:09 ページ 2

Printed in Japan

February 2009–0.8 ×1 !Printed on recycled paper

F25

T25

OWNER’S MANUAL

6BP-28199-11

U.S.A.Edition

LIT-18626-08-49

qRead this manual carefully before operating this

outboard motor.

6BP-9-11 Hyoshi 背巾4mm 09.2.19 9:09 ページ 1

Yamaha F25 User Manual To The F076dbfd 53a5 408e Af53 5936ffeb8631

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