Craftsman 536773510 User Manual HIGH WHEEL BRUSH TRIMMER Manuals And Guides L0807088

CRAFTSMAN Line Trimmers/Weedwackers, Gas Manual L0807088 CRAFTSMAN Line Trimmers/Weedwackers, Gas Owner's Manual, CRAFTSMAN Line Trimmers/Weedwackers, Gas installation guides

User Manual: Craftsman 536773510 536773510 CRAFTSMAN HIGH WHEEL BRUSH TRIMMER - Manuals and Guides View the owners manual for your CRAFTSMAN HIGH WHEEL BRUSH TRIMMER #536773510. Home:Lawn & Garden Parts:Craftsman Parts:536773510 Craftsman Grass trimmer (weed wacker) Manual

Open the PDF directly: View PDF .
Page Count: 22

6.5 Horsepower

HIGHWHEEL WEEDTRIMM_L_

MODEL NO.

536.773510

Caution:

Read and follow all Safety Rules

and Operating instructions before

first use of this product.

SEARS, ROEBUCK AND CO., Hoffman Estates, IL 60179 U.S.A

712490 02/17/99

TABLE OF CONTENTS

WARRANTY STATEMENT ...... 2

SAFETY RULES ................ 3

INTERNATIONAL SYMBOLS .... 5

ASSEMBLY ......................... 6

OPERATION ...................... 9

MAINTENANCE ................. 13

SERVICE AND ADJUSTMENT . , o 16

TROUBLE SHOOTING CHART ._ 20

SLOPE GUIDE ................. 22

REPAIR PARTS .................... 23

ENGINE REPAIR PARTS ......... 28

SPANISH (ESPA_IOL) ........... 34

PARTS ORDERING/SERVICE ... 56

,1,, rr,,r ....,r,,,_,r,,,

WARRANTY STATEMENT

LIMITED TWO-YEAR WARRANTY ON CRAFTSMAN WEEDTRIMMER

For two years from the date of purchase, when this Craftsman Weedtrimmer is maintained,

lubricated, and tuned up according to the operating and maintenance instructions in the

owner's manual, Craftsman will repair, free of charge, any defect in material or workman-

ship

If this Craftsman Weedtrimmer is used for commercial or rental purposes, this warranty ap-

plies for only 90 days from the date of purchase

This warranty does not cover the following:

Expendable items which become worn during normal use, such as spark plugs eta

Repair necessary because of operator abuse or negligence, including bent crankshafts

and the failure to maintain the equipment according to the instructions contained in the

owner's manual

WARRANTY SERVICE IS AVAILABLE BY RETURNING THE CRAFTSMAN WEED-

TRIMMER TO THE NEAREST CRAFTSMAN SERVICE CENTER/DEPARTMENT IN THE

UNITED STATES. THIS WARRANT'( APPLIES ONLY WHILE THIS PRODUCT IS IN USE

IN THE UNITED STATES.

This warranty gives you specific legal rights, and you may also have other rights which may

vary from state to state

Sears, Roebuck and Co, D817WA, Hoffman Estates ]L 60179

IMPORTANT: This unit is equipped with an internal combustion engine and must not be

used on or near any unimproved forest-covered, brush-covered or grass-covered land

unless the engine's exhaust system is equipped with a spark arrester meeting

applicable local or state laws (if any). If a spark arrester is used, it must be maintained in

effective working order by the operator.

In the State of California the above is required by law (Section 4442 of the California

Public Resources Code), Other states may have similar laws. Federal laws apply on fed-

eral lands. See an Authorized Service Center for a spark attester for the muffler°

712490 2

SAFETY RULES

Safe Operation Practices for Trimmer.

_ ARNING: Look for this symbol to point out important safety precautions,It means: "Attention! Become Alert! Your Safety Is involved."

I General Operation

1 Read. understand, and follow al! instruc-

tions on the machine and in the manual(s)

Be thoroughly familiar with the controls and

the proper use of the trimmer before start-

ing

2 Familiarize yourself with all of the safety

and operating decals on this equipment

and on any of its attachments or accesso-

ries

3 Do not put Inands or feet near or under rotat-

ing parts

4 Only allow responsible individuals, who are

familiar with the instructions, to operate the

trimmer

5 Inspect the area where the trimmer is to be

used Your equipment can propel small ob-

jects at high speed causing personal injury

or property damage Stay away from

breakable objects, such as house win-

dows. auto glass, greenhouses, etc

6 Keep the area of operation clear of al! per-

sons particularly small children, and pets

7 Wear appropriate clothing such as a !ong-

sleeved shirt or jacket Also wear long trou-

sers or slacks Do not wear shorts

8 Do not wear loose clothing which could get

caught in this equipment

9 Always wear safety goggles or safety

glasses with side shields when operating

trimmer to protect your eyes from foreign

oblects which can be thrown from the unit

10 Always wear work gloves and sturdy foot-

wear Leather work shoes or short boots

work well for most people These will pro-

tect the operators ankles and shins from

small sticks, splinters, and other debris

and improve traction

11 It is advisable to wear protective headgea_

to prevent the possibility of being struck by

small flying particles, or being struck by low

hanging branches, twigs, or other objects

which may be unnoticed by the operator

12 Do not operate tlne trimmer without proper

guards or other safety protective devices

in place

t3 Use this equipment for its intended pur-

pose only

14 See manufacturer's instructions for proper

operation and installation of accessories

712490

Only use accessories approved by the

manufacturer

15 Operate only in daylight or good artificial

light

16 De not operate the trimmer while under the

influence of alcohol, drugs or other medica-

tion which can cause drowsiness or affect

your ability to operate this machine safely

17 Never operate trimmer in wet grass Al-

ways be sure of y_ Jr footing; keep s firm

hold on the handle and walk; never run

18 Before each use, inspect the throttle con-

trol lever and cable Make sure that the

cable is free and that the lever is not dam_

aged Also check the cable linkage running

to the carburetor for kinks, loose fittings,

and obstructions Verify that the control

bail is working properly

19 Stop the rotating trimmer head when cross-

ing gravel drives, walks, or roads Wait for

the cutting lines to stop rotating

20 Watch for traffic when operating near, or

when crossing roads

21 Stop the engine (motor) whenever you

leave the equipment, before cleaning re-

pairing or inspecting the unit. be sure the

trimmer head and all moving parts have

stopped Let the engine cool, disconnect

the spark plug wire and move it away from

the spark plug

22 If the equipment should start to vibrate ab-

normally, stop the engine (motor), discon-

nect the spark plug wire and prevent it from

touching the spark plug Check immediate-

ly for the cause Vibration is generally a

warning of trouble

23 After striking a foreign object, stop the en-

gine (motor) Remove the wire from the

spark plug Inspect the trimmer for dam-

age If damaged, repair before starting and

operating the trimmer

24 Never leave the trimmer unattended when

the engine is running Remove the wire

from the spark plug

25 Regularly inspect the trimmer Make sure

parts are not bent, damaged or loose

IL Slope Operation

Slopes are a major factor related to slip and fall

accidents which can result in severe injury All

SAFETY RULES

slopes require extra caution If you feel uneasy

on a slope, do not trim it

De trim across the face of slopes; never up and

down Do net trim excessively steep slopes

(maximum 15 degrees) or areas where the

ground is very rough See the "Guide" in the

back of this manual to check e slope Exercise

extreme caution when changing direction on

slopes

De remove objects such as rocks, tree limbs,

etc

Do watch for holes, ruts, or bumps Tell grass

can hide obstacles

Do not trim near drep-offs, ditches, o_embank-

ments The operator could lose footing or bal-

ance

Do not trim excessively steep slopes

De not trim on wet grass Reduced footing

could cause slipping,

IlL Children

Tragic accidents can occur if the operator is not

alert to the presence of children Children ere

often attracted to the trimmer and the trimming

activity Never assume that children will remain

where you last sew them

1 Keep children out of the trimming area and

under the watchful care of aresponsible

adult

2 Be alert and turn trimmer oft if children en-

ter the area

3 Before and while moving backwards, look

behind and down for small children

4 Never allow children to operate the trim-

mer

5 Use extra care when approaching blind

corners, shrubs, trees, or other objects that

may obscure vision

6 On electric start models, remove the igni-

tion key to prevent accidental starting when

the trimmer is net is use

IV, Service

Use extra care in handling gasoline and

ether fuels They are flammable and va-

pors are explosive

a Use only an approved container

b Never remove gas cap or add fuelwith

the engine running AlLow engine to

cool before refueling Do net smoke

c Never refuel the machine indoors

d Never store the machine or fuel con-

tainer inside where there is an open

flame, such as a water heater,

2. Never run an engine indoors or inside a

closed area.

.3 Never make adjustments or repairs with

the engine (motor) running Disconnect the

spark plug wire, and keep the wire away

from the plug to prevent accidental starting

(remove the ignition key if equipped with an

electric start) Always wear eye protection

when you make adjustments or repairs

4 Check the trimmer head end engine

mounting bolts at frequent intervals for

proper tightness

5Keep all nuts and bolts tight and kee F

equipment in good condition Chec_

mounting hardware on trimmer head ever_

time you change trimmer line and prior tc

each use

6 Never tamper with safety devices Checl

their proper operation regularly

7 When servicing or repairing the trimmer, dc

not tip the machine over or up unless spe

cificaUy instructed to do so in this Manual

Service and repair procedures can be done

with the trimmer in an upright position

Some procedures will be easier if the ma

chine is lifted on a raised platform or work

ing surface

8 To reduce fire hazard, keep trimmer free e

grass, leaves, or other debris build-up

Clean up oil or fuel spillage Al!ow trimme

to cool before storing

9 Stop and inspect the equipment if ym

strike an object Repair, if necessary, be

fore restarting

1(3 Always disconnect spark plug wire bafor_

cleaning, repairing, or adjusting

11 Do not change the engine governor settinc

or over-speed the engine

12 Clean and replace safety and instructior

decals as necessary

13 To guard against engine over-heating, a

ways have engine debris filter meunte

and ctean

14 Inspect trimmer before storage.

15 Use only original equipment or authorize

replacement parts

71249O 4

SAFETY RULES

INTERNATIONAL SYMBOLS

IMPORTANT: Many of the following symbols are located on your unit or on literature sup-

plied with the producL Before you operate the unit, learn and understand the purpose for

each symbol.

Control And Operating Symbols

Slow Fast Fuel Oil

Safety Warning Symbols

WARNING

Thrown Objects.

Keep Bystanders Away.

WARNING

Rotating Parts. Stop Engine.

Disconnect Spark Wire Before

Making Adjustments.

WARNING

IMPORTANT

Read Owner's Manual

Before Operating

This Machine.

WARNING

Wear Eye Protection

WARNING

Never Operate Up Or

Down Slopes. Operate

Across Slopes.

STOP

712490 5

ASSEMBLY

ASSEMBLY

CONTENTS OF PARTS BAG

1 Owner's Manual

- Parts Bag

Not shown actual size) _,._

1 - T-Handle Wrench 1 - Safety Glasses 1- 20 oz, Bottle Oil

2Sets - Trimmer Lines

(0.155 inch diameter)

WARNING: Always wear safety

glasses or eye shields while as-

sembling the trimmer.

TOOLS REQUIRED

1 - Knife to cut carton

1 - T-Handle Wrench

Figure 1 shows the trimmer completely as-

sembled and positioned in the carton for ship-

ment

References to the right or left hand side of the

trimmer are from the viewpoint of the opera-

tors position behind the unit

TO REMOVE THE

TRIMMER FROM CARTON

1 Remove the bottle of oil and parts bag

from carton

2 Remove the packing material positioned

around the unit

3 Cut down all four corners of the carton and

lay the side panels flat

4 Pull the trimmer out of the carton and off

the base pad

5 Remove packing matenal from around the

trimmer head

6 Remove protective plastic from front of

frame

Figure 1

71249O 6

ASSEMBLY

HOW TO RAISE THE HANDLE

1 Hold the handle with one hand and loosen both handle adjustment knobs until the ratchet

teeth are disengaged Do not remove the handle adjustment knobs See Figure 2

2 Raise the handle to the

operating position

3 Stand in the operator's

poMtion behind the trim-

mer Put the handle in a

comfortable position

Make sure both sides of

the handle are level

NOTE: Make sure the

cables are not caught

between the upper and

lower handle,,

Tighten the handle ad-

justment knobs Make

sure the handle pivots

are locked in place

NOTE: The handle

height is adjustable,

See "How To Adjust

The Height Of The Han-

dle" in the Adjustment

section.

Handle Adjustment

Knob

Figure 2

5 To attach the recoil start handle to the rope guide, twist the rope through

the rope guide mounted on the right side of the handle

HOW TO INSTALL

THE ENGINE DEBRIS SHIELD

!

2

Remove the engine debris shield from the

protective packaging

Attach the engine debris shield to the two

mounting brackets with the wingnuts as

shown in Figure 3 Make sure the wing-

nuts are tight

71249O 7

ASSEMBLY

ENGINE PREPARATION

Fill Crankcase With Oil

The tdmmer was shipped with a container of

SAE30 motor oil This oil must be added to the

engine before operating

1 Remove the oil fill cap/dipstick shown in

Figure 4 Fill the crankcase to the FULL

line on oil fill cap/dipstick DO NOT OVER-

FILL.

2 install the oil fill cap/dipstick and tighten

securely

Fill Fuel Tank With Gasoline

For the correct procedure and grade of

gasoline, see "How To Fill With Gasoline" in

the Operation section

Fuel Cap

Oil Fill Cap/

Figure 4

,I CHECKLIST

For the best performance and satisfaction

from this quality product, please review the fol-

lowing checklist before you operate the trim-

met:

_-" All assembly instructions have been

completed

l-" Check carton Make sure no loose parts

remain in the carton

As you learn how to use the trimmer, pay extra

attention to the following important items:

v",_" Engine oil is at correct level

v,'_t Fuel tank is filled with fresh, clean, reg-

ular unleaded gasoline

_--"_" Become familiar and understand the

function of all controls Before your start

the engine, operate all controls

712490 8

OPERATDON

KNOW YOUR TRIMMER

READ THE OWNER'S MANUAL AND ALL SAFETY RULES BEFORE YOU OPERATE the trim-

mer To familiarize yourself with the location of the controls, compare the illustrations with your trim-

rner Save this manual for future reference,

Control Bail Trimmer Head Drive Lever

J

._pper Handle

Throttle Control Lever

Recoil Starter Handle Fuel Cap

Engine Debris Shield

Handle Adjustment Knob

Dipstick

Shield Edge Guard

Trimmer Head

Trimmer Une

Figure 5

Trimmer Head Drive Lever - Engages

the rotation of the trimmer head

Control Bail - Release to stop the rotation

of the trimmer head

Throttle Control Lever - Controls the

speed or stops the engine

Primer Button - Injects fuel directly into the

carburetor manifold for faster starts See

Figure 8

Recoil Starter Handle - The engine is

equipped with an easy pull recoil starter

Shield Edge Guard - Protects the shield

by automatically cutting the line to the correct

length

Engine Debris Shield - Protects the en-

gine from debris Can be easily removed to

service the engine

EYE PROTECTION

WARNING: Debris thrown from

the trimmer call result in foreign

objects being thrown into the

eyes, which can cause severe

eye damage, Always wear safety

glasses or eye shields when op-

erating the trimmer.

Always wear safety glasses If you wear eye

glasses put a Wide Vision Safety Mask over

your eye gIasses

712490

HOW TO STOP

THE TRIMMER HEAD

Releasethe control bail It willreturn toits

open position and disengage the trimmer

head

HOW TO STOP THE ENGINE

1 Move the throttle control lever com-

pletely back to the STOP position

9

OPERATION

HOW TO USE THE

TRIMMER HEAD DRIVE LEVER

To engage the trimmer head, hold the con°

trol bail against the handle Move the

trimmer head drive lever forward to en-

gage the trimmer head See Figure 6 The

faster the engine runs, the faster the trim-

mer head will rotate

Once the trimmer head is rotating, push

the trimmer forward to trim

Control Bail

_Handle

Trimmer Head

Drive Lever

Figure 6

HOW TO USE THE

THROTTLE CONTROL

2

During normal use, set the throttle con-

trol lever in the FAST position to run the

engine at full speed

Pull the throttle control lever back to de-

crease engine speed Push the throttle

control lever forward to increase engine

speed

To stop the engine, pull the throttle con-

trol lever completely back to the STOP

position

Throttle Control

Lever

Figure 7

HOW TO USE

THE PRIMER BUTTON

! Push the primer button five times See

Figure 8 for location Wait approximately

two seconds between each push

NOTE: Do not use the primer button to re-

start a warm engine after a short shutdown.

712490 tO

OPERATION

BEFORE STARTING THE ENGINE

Oi! Recommendation

Only use high quality detergent oil rated with

API service classification SG Select the oil's

SAE viscosity grade according to your ex-

pected operating temperature:

Cotder <_,_ _ _. _. ,_ ,_,_> Warmer

<<....... ..->>

5w30 SAE30

NOTE: Although multi-viscosity oils

(5W30, 10W30, etc.) improve starting in

cold weather, these multi-viscosity oils

will result in increased oil consumption

when used above 32°E To avoid possible

engine damage from running low on oil,

frequently check your engine oil level

Check The Engine Oil

Before each use check the engine oil as

follows:

1 Put the trimmer on a level surface

2 Remove the oil fill cap/dipstick shown in

Figure 9

3 Make sure the oil reaches the FULL mark

on the oil fill cap/dipstick

4 If necessary, add oil until the FULL mark

on the oil fill cap/dipstick is reached DO

NOT OVERFILL See "Oil Recommenda-

tion" for the grade and type of oil to use

Fuel Cap

Oil Fill Cap/Dipstick

Debris Screen

712490

Figure 9

How To Fill With Gasoline

NOTICE; ENGINES WHICH ARE CERTI-

FIED TO COMPLY WITH CALIFORNIA AND

US EPA EMISSION REGULATIONS FOR

ULGE ENGINES: Are certified to operate on

regular unleaded gasoline Include the follow-

ing emission control system(s): EM, TWC (if

so equipped) include any user adjustable

features-therefore no other adjustments are

needed

WARNING: Never fill the gas tank

while the engine is running or

hot. Allow the engine to cool

before adding gasoline, Immedi-

ately wipe off any spilled gaso-

line before you start the engine.

WARNING: Gasoline is flam-

mable. Use caution when han-

dling or storing gasoline. Keep

away from an open flame or an

electrical spark. Do not smoke

while filling the fuel tank. Store

gasoline In a clean, approved

container in a cool well ventilated

place; never In the house.

Fill the fuel tank with a fresh, clean, unleaded

regular, unleaded premium, or reformulated

automotive gasoline only DO NOT use

leaded gasoline Be sure that the gasoline

container is clean and free from dust or other

foreign particles Never use gasoline that is

stale from long periods of storage Reinstall

fuel cap

CAUTION: Alcohol blended fuels (called

gasohol or using methanol) can attract

moisture which leads to separation and

formation of acids during storage. Acidic

gas can damage the fuel system of an en-

gine while in storage, To avoid engine

problems, empty the fuel system before

storage of 30 days or longer. Drain the fuel

tank. Start the engine and let it run until the

fuel lines and carburetor are empty. Never

use engine or carburetor cleaner products

in the fuel tank or permanent damage may

occur. See "Storage Instructions" for addi-

tional information.

11

OPERATION

HOW TO START THE ENGINE

NOTE: DO NOT BE ALARMED, your engine

will smoke the first time it is started. It is

burning offthe protective coating that is on

the internal engine parts.

_WARNING: Never leave the trim=

mer unattended whil the engine

is runngin, Wait for the trimmer

lines to stop rotation,

2

3

4

5

Before each use remove debris from the

debris screen shown in Figure 9 Debris

can cause the engine to overheat Wipe

the debris screen with a cloth or paper

towel

Move the throttle control lever forward to

the START or FAST position

To start a cold engine, push the primer but-

ton five times Wait two seconds between

each push of the primer button

NOTE: Do not use the primer to start a

warm engine.

Firmly hold the recoil starter handle with

your right hand See Figure 10

Pull back sharply on the recoil starter

handle DO NOT allow the starter rope to

snap back Let the starter rope slowly re-

wind as you hold the recoil starter handle

NOTE: If engine fails to start after three

pulls, push the primer button two times and

again pull the recoil starter handle.

WARNING: Never run the en=

gine indoors or in apoorly venti-

lated area_ Engine exhaust con-

tains carbon monoxide, an

odorless and deadly gas° Keep

hands, feet, hair and loose

clothing away from the trimmer

and any moving parts on the en-

gine. Avoid the muffler and sur-

rounding areas= Temperatures

may exceed 150°E

Recoil Starter Handle

Figure lO

TRIMMER TIPS

_ WARNING: Debris such as sticks,

gravel or rocks, can be thrown

with sufficient force to cause per-

sonal injury or property damage.

Set the throttle control in the FAST posi-

tion If the weeds or grass are tall and

thick, operate the trimmer at a slower

walking speed

Frequently clean the underside of the trim-

mer to remove any grass build up See the

Maintenance section for details

For best results and longer lasting line,

use the ends of the line to do the cutting

This is easily done by moving slowly

through very thick or heavy weeds

If the trimmer lines become too short, it will

712490

take longer to complete the job If the trim-

met lines are worn to less than half their

original length, change to a new trimmer

line "See How To Change The Trimmer

Une" in the Service And Adjustment sec-

tion

Do not trim on excessively steep slopes If

a slope is difficult to stand on, do net trim

Do not trim on slopes when the ground is

slippery or wet Trim across the face of e

slope, not up and down

12

Trimmer head contact to concrete, asphalt

and harder services may create prema-

ture wear to the height guide (See

Figure 18)

MAINTENANCE

CUSTOMER RESPONSIBILITIES

SERVICE RECORDS

Fill in datesas you

completeregularservice.

;,.., . .,,,,..,,

ICheck Engine Oil Level

Before Every Every Every

Each 5 25 100 As SERVICE

Use Hours Hours Hours Noted DATES

V

Check trimmer Lines

Check Trimmer Head

Engagement

Engine/Machine Cleaning

Check Nuts and Bolts

Check Spark Plug

Change Engine Oil

Service Air Filter

Lubricate Jackshaft Assembly

Lubricate Wheel Bearings

,/ 2

V

,/

V

,/

_ _ i i _ "_ • _ I_

3

Note I - When old line is half the original length, replace with new line

Note 2 - Clean daily if used in extremely dusty or dirty conditions

Note 3 - Change more often if used in extremely dusty or dirty conditions

PRODUCT SPECIFICATIONS

Trimmer Line Diameter 0 155 inch

Trimmer Line Length 21 5 inches

Horse Power 6 5

Displacement 12 0 cu in

Gasoline Capacity 1 5 quarts

Oil Capacity 20 oz

Spark Plug Champion

RJ-t9LM

Spark Plug Gap 0 030 inch

GENERAL RECOMMENDATIONS

The warranty on this trimmer does not cover

items that have been subjected to operator

abuse or negligence To receive full value from

the warranty, the operator must maintain the

trimmer as instructed in this manual

Some adjustments must be made periodically

to properly maintain your trimmer

All adjustments in the Service and Adjust-

ments section of this manual must be checked

at least once each season

712490 13

LUBRICATION MAaNTENANCE

How To Lubricate

The Jackshaft Assembly

Agrease fitting is provided to lubricate the

jacksheft assembly Use a grease gun with au-

tomotive type grease to lubricate the jackshaff

assembly as shown in Figure 11 Figure 11

How To Change Engine Oil

Change the engine oil when the engine is

warm For the proper oil capacity, see "Product

Specifications"

1 Disconnect spark plug wire from the spark

plug

2 Remove the oil drain plug as shown in

Figure 12

7 Connect the spark plug wire to the spark

plug

3 Drain all the engine oil into a flat pan

4 Install the oil drain plug Make sure the

oil drain plug is tight

5

6

Remove the dipstick

Fill the engine crankcase DO NOT

OVERFILL For proper oil capacity, see

"Product Specifications"

HOW TO REPLACE THE AIR FILTER 5 Put the new air filter into the cover

Replace the air filter once a year or more often

in dusty or dirty conditions DO NOT attempt to

clean or oil the air filter Remove and install e

new air filter as follows:

CAUTION: Never run the engine without

the air filter installed. An air filter clogged

with dust can result in loss of engine power

and can cause excessive wear or damage

to the engine. If the air filter is clogged, re-

place immediately.

1 Disconnect the spark plug wire from the

spark plug

2 Turn the cover clockwise as shown in

Figure 13 Remove the cover and the air

filter,

3 Discard the old air filter,

Push the cover firmly against the flange,

Turn the cover counterclockwise until

tight Be sure the retainers are locked

around the flange

Connect the spark plug wire to the spark

plug

Air Filter

4 Clean the cover and the flange

71249o 14

MABNTENANCE

HOW TO SERVICE Engine Debris Shield

THE ENGINE AND SPARK PLUG

1 To access the engine or the spark plug, re-

move the engine debris shield as shown in

Figure 14

2 After engine service is completed, replace

the engine debris shield /

Wingnut

Figure 14

SPARK PLUG

Check the spark plug every 25 hours Re-

place the spark plug if the electrodes are

pitted or burned or if the porcelain is cracked

Make sure the spark plug is clean Clean

the spark plug by carefully scraping the

electredes Ida net sand blast er use a wire

brush)

2

3

Check the spark plug gap with a feeler

gauge See 'Product Specifications" for

the correct spark plug gap and replace r

ment spark plug

Before installing the spark plug, ceat the

threads lightty with oi_ for easy removal

Tighten the spark plug to a torque of 15

foot-pounds

712490 15

SERVICE AND ADJUSTMENT

SERVICE AND ADJUSTMENT

WARNING: Before you inspect, clean or service the trimmer, stop the engine.

Make sure that all moving parts have stopped. Disconnect the wire from the

spark plug.

HOW TO

REPLACE THE TRIMMER LINE

For the best performance, use a heavy

gauge (0 155" diameter) trimmer line Cut

the length of the trimmer line to 21 5 inches

Use the length guide, located on the shield,

to make sure the trimmer line is the correct

length See Figure 16 Do not allow the

length of the lines to vary more than one

inch This is important to make sure the trim-

mer head is balanced and does not vibrate

IMPORTANT: To extend the life of the trim-

mer line, keep the trimmer line moist. If not

kept moist, the nylon trimmer line will be-

come dry and brittle. Keep extra trimmer

line in acan of water. The line will then stay

flexible and easy to change. Aflexible line

will also last much longer.

Trimmer Une Shield

Figure 16

HOW TO CHANGE TRIMMER LINES

When the trimmer line becomes worn to half the original !ength, replace the trimmer line as

fol!ows:

Une Trimmer

Retainer Une

1 Stop the engine Wait for

all moving parts to stop

2 Remove worn trimmer

line from line retainer

3First, thread the ends of

the new trimmer line

through the outside

loops

Line

Retainer

4Next, taketheends of the

line, cross over the line

retainer, and thread the

ends through the center

hole

5Then, check to make

sure that the ends of the

line are even

712490 16

SERVDCE AND ADJUSTMENT

HOW TO ADJUST

THE HEIGHT OF THE HANDLE

Use the knobs, on each side of the handle, to

adiust the height of the handle

1 Hold the handle with one hand and loosen

both knobs until the ratchet teeth are dis-

engaged Do net remove the knobs See

Figure 17

2 Move the handle up or down to the de-

sired position, then align the ratchet

teeth Make sure both sides of the handle

are level

3 Tighten the knobs

HOW TO SET THE HEIGHT OF CUT

CAUTION: Before you set the

height of cut: stop the engine.

Wait for all moving parts to stop.

Allow the engine to cool and dis-

connect the spark plug wire.

The height of cut can be set from 1-1/2 inches

to 3 inches Recommended cutting height for

the average yard is 2"

1 Use the T-wrench. found in the parts bag,

to loosen the set screw shown in

Figure 18

2 Set the trimmer head at the desired

height

3 Tighten the sat screw.

Height Of Cut Positions

Trimmer

Set Screw Head

Height Guide T-Wrench

Figure 18

712490 17

SERVICE AND ADJUSTMENT

HOW TO

REPLACE THE DRIVE BELT

To replace the drive belt, the trimmer head

and shield must be removed as follows

WARNINGr Before you remove

the drive belt, disconnect the wire

from the spark plug=

Remove the two fasteners that hold the

rear of the shield to the trimmer housing

(See Figure 19).

2 Remove the four fasteners that hold the

front of the shield and trimmer head to

the trimmer housing.

3 Remove the "V" pulley from the idler

bracket

4.

5

Raise the front of the trimmer housing

and remove the drive belto On some mod-

els, it is necessary to loosen the mount-

ing bolt for the drive pulley to remove the

drive belt (see F_gure 20) Do not bend the

belt guides

NOTE: Make sure you replace the drive

belt only with areplacement belt from

the factory.

To assemble the drive belt, reverse the

above steps, Make sure all fasteners are

tight Make sure the mounting bolt for the

drive pulley is tight,

6 Check the routing of the drive belt. Make

sure the drive belt is inside of all belt

guides shown in Figure 20

iMPORTANT: Test the drive system. Start

the engine and move the throttle control to

the FAST position. Engage and disengage

the trimmer head several times, When dis-

engaged, make sure the trimmer head com-

pletely stops when resting on the ground. If

the trimmer head continues to rotate, take

the trimmer to the nearest Craftsman

Service Center.

712490 18

SERVHCE AND ADJUSTMENT

STORAGE

WARNING: Do not remove gaso-

line while inside a building, near

a fire, or while you smoke. Gaso-

line fumes can cause an explo-

sion or a fire.

When the trimmer is put in storage for thirty

days or more. follow the steps below to

make sure the trimmer is in good condition

the following season

Trimmer

Completely clean the trimmer

Put the trimmer in a building that has good

ventilation

NOTE: A yearly checkup or tune-up at a

Craftsman authorized service center will

make sure that the trimmer will provide

maximum performance for the next sea-

SOn_

Engine

IMPORTANT: It is important to prevent gum

deposits from forming in fuel system parts

such as the carburetor, fuel filter, fuel hose,

and tank during storage. Also, using alco-

hol-blended fuels (called gasohol, ethanol

or methanol) can attract moisture which

leads to separation and formation of acids

during storage. Acidic gas can damage the

fuel system of an engine while in storage.

To prevent engine damage when the trimmer

is in storage for 30 days or more, follow the

steps below:

Let the engine run until it is eut of gasoline

Drain the oi! from the warm engine Fill the

engine crankcase with new el!

Remove the spark plug from the cylinder

Pour one ounce of oil into the cylinder

Slowly pull the recoil starter handle so that

the ei] will protect the cylinder Install a new

spark plug in the cylinder

Clean dirt and debris from the cylinder

cooling fins and the engine housing

If you do net want to remove gasoline, add

a fuel stabilizer, such as Craftsman fuel

stabilizer No 33500, to any gasoline left in

the tank Craftsman fue! stalibizer will

minimize the formation of gum deposits

and acids If the tank is almost empty, mix

Craftsman fuel stabilizer with fresh gaso-

line in a separate container and add the

mixture to the tank Always follow the in-

structions on the stabilizer container Run

the engine at least ten minutes after stabi-

lizer is added to allow the mixture to reach

the carburetor

712490 19

TROUBLE SHOOTING CHART

TROUBLE

Engine does not start

Engine runs poorly.

CAUSE

Spark plug wire

disconnected

Engine not primed

Defective or incorrectly

gapped spark plug

Fuel tank empty

Dirty carburetor or fuel line

Dirty air filter

Carburetor out of adjustment

Engine flooded

Throttle control lever in

incorrect position

Stale gasoline

Defective throttle control

lever or wire

Bad spark plug

Dirty air filter

Carburetor out of adjustment

Stale gasoline

Engine cooling system

clogged

CORRECTION

Connect spark plugwire

Prime engine

inspect or replace spark

plug

Add fuel

Clean carburetor or fuel line

Replace air fitter

For carburetor adjustment.

take the unit to a Craftsman

Service Center

Wait several minutes before

starting

Move throttle lever to FAST

or START position

Drain old gasoline and add

fresh gasoline

Inspect lever and wire

Replace if damaged or

defective.

Replace spark plug

Replace air filter

Adjust carburetor Take the

unit to a Craftsman Service

Center

Drain old gasoline Add fresh

gasoline

Clean engine screen and

cooling fins

712490 20

TROUBLE SHOOTaNG CHART

Engine overheats.

Engine will not stop

running.

Poor trimming

performance.

Trimmer vibrates.

Trimmer head does not

retain line

Engine cooling system

clogged

Carburetor out of adjustment

Oil level is low

i Defective throttle control

lever or wire

l Throttle not adjusted

3roperly

Trimmer line length is too

short

Engine not set at FAST

speed

Set screw for trimmer head

is loose

Trimmer line lengths are

substantially different

Loose nuts or bolts

Broken trimmer head,

Trimmer linenat prapedy

attached

Broken line retainer

Trimmer line netcorrect size

Clean debris screen and

engine cooling fins

Adjust carburetor Take the

unit to a Craftsman Service

Center

Add oil

Inspect and replace

damaged parts

Move throttle to the full OFF

position

Correct line length is 21 5

inches When less than 1/2

this length, replace the line

Move engine throttle Fever to

i FAST position

Tighten set screw with

T-handle wrench

Adjust trimmer line to

approximately equal lengths

Check all bolts and nuts,

including engine bolts

[ Replace broken part

,Fol_owinstructions on decal

or in the Service section of

[ the owner's manual

Replace trimmer head

assembly

Use Craftsman 0 155 inch

I diameter trimmer line

712490 21

",,4

h_

_0

O

Is- SLOPE GUBDE

•.......D..._'..GR_._ BIGHT AND HOLD THIS GUIDE LEVEL WITH A VERTICAL

.: • ......S ....... TREE, A CORNER OF A STRUCTURE, A POWER LINE

I _:. "I"............. POLE, OR A FENCE.

I _ "................ .

l'...."......... OLD,,^

•-"....."_.L.!.N_....

10 DEGREES

Operate a trimmer across the face

of slopes, never up or down slopes.

15 DEGREES

Use this guide and do not trim on a slope greater than 15 degrees.

A10 degree slope is a hill that increases in height at approximately 1.7 feet in 10 feet..

A 15 degree slope is a hill that increases in height at approximately 2.5 feet in 10 feet..

Use extreme care at all times and avoid sudden turns or maneuvers. Follow other instructions in this

manual for safety in trimming on slopes. Operate a trimmer across the face of slopes, never up or down

slopes. Use extra care when operating on or near slopes and obstructions.