Stihl Bg75 Manual BG 75

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STIHL BG 75

III

Instruction Manual

Owner's Manual

Assembling

Safety Precautions

Operating Instructions

Maintenance

Parts and Controls 2

Definitions 3

Safety Precautions 4

Assembling the Blower 10

Fuel Mix 11

Fueling 11

Starting 12

Using the blower 14

Cleaning the Air Filter 16

Adjusting the Carburetor 16

Motormanagement 16

Spark Arresting Screen in Muffler 17

Checking the Spark Plug 18

Replacing the Starter Rope

and Rewind Spring 19

Operating Instructions 21

Maintenance Chart 22

Specifications 23

Special Accessories 23

Storing the Machine 23

STIHL Incorporated Federal and

California Emission Control

Warranty Statement 24

This Manual contains operating and

safety instructions for all STIHL BG 75

blowers.

Pay special attention to the safety

precautions outlined on pages 4 to 9.

Allow only persons who understand this

Manual to operate your blower.

To receive maximum performance and

satisfaction from your STIHL blower, it is

important that you read and understand

the maintenance and safety precautions

before using your blower.

Contact your STIHL dealer or the STIHL

distributor for your area if you do not

understand any of the instructions in this

Manual.

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Because a blower is a high-speed tool,

some special safety precautions must

be observed as with any other power

tool to reduce the risk of personal injury.

Careless or improper use may cause

serious or even fatal injury.

STIHL’s philosophy is to continually

improve all of its products. As a result,

engineering changes and improvements

are made from time-to-time.

If the operating characteristics or the

appearance of your blower differ from

those described in this Manual,

please contact your STIHL dealer for

information and assistance.

&RQWHQWV

0458 326 3021. M10. E9. T. Printed in Germany

 1999 Andreas Stihl AG & Co., Waiblingen

Printed on chlorine-free paper

Printing inks contain vegetable oils,

paper is recyclable

%* 

1 = Slide control

2 = Handle

3 = Throttle trigger

4 = Intake screen

5 = Clamp

6 = Blower tube

7 = Nozzle

8 = Spark plug boot

9 = Fuel pump

10 =Choke lever

11 =Filter housing

12 = Carburetor adjusting screws

13 =Starter grip

14 = Fuel filler cap

15 = Fuel tank

16 = Muffler

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14

1

326BA038 KN

11

8

10 12

13

15

9

16

5

2

3

4

6

7

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 6OLGH&RQWURO

Start, run and stop switch.

 +DQGOH

The handle of the blower held by the

right hand.

 7KURWWOH7ULJJHU

Controls the speed of the engine.

 ,QWDNH6FUHHQ

Reduces the risk of direct contact

with the fan.

 &ODPS

Secures blower tube to machine.

 %ORZHU7XEH

Directs airstream.

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Aims and widens the airstream

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Connects the spark plug to the

ignition wire.

 )XHO3XPS

Provides additional fuel feed for a

cold start.

 &KRNH/HYHU

Eases engine starting by enriching

mixture.

 )LOWHU+RXVLQJ

Covers the air filter element.

 &DUEXUHWRU$GMXVWLQJ6FUHZV

For tuning carburetor

 6WDUWHU*ULS

The grip of the pull starter, which is

the device to start the engine.

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For closing the fuel tank.

 )XHO7DQN

For fuel and oil mixture.

 0XIIOHU

Attenuates exhaust noises and

diverts exhaust gases away from

operator.

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Careless or improper use of the machine

may cause serious injury. Have your

STIHL Dealer show you how to operate

your blower. Observe all applicable

local safety regulations, standards and

ordinances.

:DUQLQJ

Minors should never be allowed to use a

blower : Bystanders, especially children,

and animals should not be allowed in the

area where a machine is in use.

Never let the unit run unattended.

Do not lend or rent your machine without

the owner‘s manual. Be sure that any-

one using your unit understands the

information contained in this manual.

Most of these safety precautions and

warnings apply to the use of all STIHL

blowers. Different models may have

different parts and controls.

See the appropriate section of your

owner‘s manual for a description of the

controls and function of the parts of your

machine.

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1. the operator

2. the blower

3. the use of the blower .

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You must be in good physical condition

and mental health and not under the

influence of any substance (drugs,

alcohol, etc.) which might impair vision,

dexterity or judgment. Do not operate a

blower when you are fatigued .

Be alert - if you get tired while operating

your machine, take a break. Tiredness

may result in loss of control. Working

with any blower can be strenuous. If you

have any condition that might be aggra-

vated by strenuous work, check with your

doctor before operating the machine.

:DUQLQJ

Prolonged use of a blower, (or other

machines) exposing the operator to

vibrations may produce whitefinger

disease (Raynaud‘s phenomenon)or

carpal tunnel syndrome. These condi-

tions reduce the hand‘s ability to feel

and regulate temperature, produce

numbness and burning sensations and

may cause nerve and circulation

damage and tissue necrosis.

:DUQLQJ

The STIHL blower is not equipped with

an antivibration (AV) system. Other

STIHL blower models are available with

an AV system designed to reduce the

transmission of engine vibrations to the

operator’s hands. An AV system is

recommended for those operators who

use blowers on a regular or sustained

basis.

Antivibration systems do not guarantee

that you will not sustain whitefinger

disease or carpal tunnel syndrome.

Therefore, continual and regular users

should monitor closely the condition of

their hands and fingers. If any of the

above symptoms appear, seek medical

advice immediately.

3URSHU&ORWKLQJ

Clothing must be sturdy and snug-fitting,

but allow complete freedom of move-

ment.

:DUQLQJ

Avoid loose-fitting jackets, flared or

cuffed pants, scarfs, unconfined long

hair or anything that could be drawn into

the air intake.

Wear overalls or long

pants to protect your legs.

Do not wear shorts.

6DIHW\3UHFDXWLRQV



Use of gloves when

working with the blower is

recommended.

Good footing is most

important. Wear sturdy

shoes with nonslip soles.

:DUQLQJ

To reduce the risk of injury associated

with the inhalation of dust, use a face

filter mask when using your blower in

dusty conditions.

:DUQLQJ

Proper eye protection is a must. Even

though the discharge is directed away

from the operator, ricochets and bounce

backs can occur during blower

operations.

Never operate a blower

unless wearing goggles

or properly fitted safety

glasses with adequate

top and side protection

which comply with ANSI Z 87.1 (or your

applicable national standard).

:DUQLQJ

Blower noise may damage your hearing.

Wear sound barriers (ear plugs or ear

mufflers) to protect your hearing. Conti-

nual and regular users should have their

hearing checked regulary.

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For illustrations and definitions of the

blower parts see the chapter on "Parts

and Controls"!

:DUQLQJ

Never modify a blower in any way. Only

attachments supplied by STIHL or

expressly approved by STIHL for use

with the specific STIHL blower models

are authorized. Although certain

unauthorized attachment are useable for

the STIHL blower, their use may be

extremely dangerous.

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Always turn off the engine before putting

down blower. When transporting your

unit in a vehicle, properly secure it to

prevent turnover, fuel spillage and

damage to the machine.

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This STIHL unit uses an oil-gasoline

mixture for fuel (see the chapter on

"Fuel" of your owner‘s manual).

:DUQLQJ

Gasoline is an extremely

flammable fuel. If spilled

or ignited by a spark or

other ignition source, it

can cause fire and

serious burn injury or property damage.

Use extreme caution when handling

gasoline or fuel mix.

Do not smoke or bring any fire or flame

near the fuel.

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Fuel your machine in well-ventilated

areas, outdoors only. Always shut off the

engine and allow it to cool before refuel-

ing. Relieve fuel tank pressure by loosen-

ing fuel cap slowly. Never remove fuel

filler cap while engine is running.

Select bare ground for fueling and move

at least 10 feet (3 m) from the fueling

spot before starting the engine.

Wipe off any spilled fuel before starting

your blower and check for leakage.

Always tighten fuel filler cap securely

after fueling.

:DUQLQJ

Check for fuel leakage while refueling

and during operation. If fuel or oil

leakage is found, do not start or run the

engine until leak is fixed and spilled fuel

has been wiped away. Take care not to

get fuel on your clothing. If this happens,

change your clothing immediately.

Always store gasoline in approved

container.



:DUQLQJ

Unit vibrations can cause an improperly

tightened fuel cap to loosen or come off

and spill quantities of fuel.

In order to reduce risk of

fuel spillage and fire,

tighten fuel cap by hand

with as much force as

possible.

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You should always inspect your unit

before starting it. Make sure the controls

and safety devices are working properly.

:DUQLQJ

Your blower is a one-person machine.

To reduce the risk of eye or other injury

from thrown objects, insure that by-

standers are at least 50 feet (15m) away

during use.

Stop the engine immediately if you are

approached.

For specific starting instructions, see the

appropriate section of your owner‘s

manual. Place the machine on firm

ground or other solid surface in an open

area. Maintain good balance and secure

footing.

:DUQLQJ

When you pull the starter grip, don‘t

wrap the starter rope around your hand.

Do not allow the grip to snap back, but

guide the starter rope slowly back to

permit the rope to rewind properly.

Failure to follow this procedure may

result in injury to hand or fingers and

may damage the starter mechanism.

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DGMXVWPHQWV

:DUQLQJ

Never operate your machine if it is

damaged, improperly adjusted or not

completely and securely assembled.

:DUQLQJ

Start and operate your unit outdoors in a

ventilated area.

Keep the space behind and beside the

engine clear at all times to allow for the

escape of hot and toxic exhaust fumes.

When working with a handheld blower,

always carry it with the muffler away

from you to reduce the risk of burns from

contact with the hot muffler or hot

exhaust fumes.

Operate your machine under good

visibility and daylight conditions only.

Work carefully.

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Operate the blower under good visibility

and daylight conditions only.

:DUQLQJ

Your blower produces

poisonous exhaust fumes

as soon as the combus-

tible engine is running.

These gases (e.g. carbon

monoxide) may be color-

less and odorless.

To reduce the risk of serious or fatal

injury from breathing toxic fumes, never

run the blower indoors or in poorly

ventilated locations. Ensure proper

ventilation when working in trenches or

other confined areas.

:DUQLQJ

Use of this product can generate dust,

mists, and fumes containing chemicals

known to cause respiratory disease,

cancer, birth defects, or other reproduc-

tive harm. If you are unfamiliar with the

risks associated with the particular dust,

mists or fumes at issue, consult your

employer, governmental agencies such

as OSHA and NIOSH and other sources

on hazardous materials. If the substance

being blown or vacuumed is a commer-

cial substance, review the material

safety data sheet for that substance and

/ or consult the material manufacturer /

supplier. The state of California and

some other authorities, for instance,



have published lists of substances

known to cause cancer, reproductive

toxicity, etc.

Control dust, mist and fumes at the

source where possible. In this regard

use good work practices and follow the

recommendations of OSHA / NIOSH

and occupational and trade associa-

tions. When the inhalation of toxic dust,

mists and fumes cannot be eliminated,

the operator and any bystanders should

always wear a respirator approved by

NIOSH / MSHA for the substance at

issue.

:DUQLQJ

Dust with silica in its composition may

contain crystalline silica. Silica is a basic

component of sand, quartz, brick, clay,

granite and numerous other minerals

and rocks, including masonry and con-

crete products. Repeated and / or sub-

stantial inhalation of airborne crystalline

silica can cause serious or fatal respira-

tory disease, including silicosis. In addi-

tion, the state of California and some

other authorities have listed respirable

crystalline silica as a substance known

to cause cancer. When encountering

such materials, always follow the re-

spiratory precautions mentioned above.

:DUQLQJ

Breathing asbestos dust is dangerous

and can cause severe or fatal injury, re-

spiratory illness or cancer. The use and

disposal of asbestos containing products

have been strictly regulated by OSHA

and the Environmental Protection

Agency. Do not blow or disturb asbestos

or asbestos containing products, such

as asbestos insulation. If you have any

reason to believe that you might be

disturbing asbestos, immediately contact

your employer or a local OSHA

representative.

When working with the blower, always

wrap your fingers tightly around the

handle, keeping the control handle

cradled between your thumb and

forefinger. Keep your hand in this

position to have your machine under

control at all times. Make sure your

control handle (and grip for vacuum

attachment) are in good condition and

free of moisture, pitch, oil or grease.

:DUQLQJ

To reduce the risk of personal injury, do

not direct air blast towards bystanders,

since the high pressure of the air flow

could injure eyes and could blow small

objects at great speed.

:DUQLQJ

Always shut off the engine before

cleaning or servicing the unit or

replacing parts.

The blower fan between the air intake

and output openings rotates whenever

the engine is running. In order to reduce

the risk of injury from contact with the

fan, never operate your unit without a

properly mounted intake screen and

blower tube. Never insert any foreign

object into the air intake or output

openings of the machine.

Pay attention to the direction of the wind,

i.e., do not work against the wind.

326BA000 LA



To reduce the risk of stumbling and loss

of control,do not walk backward while

operating the machine.

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(special accessory)

For specific assembling instructions, see

the appropriate section of your owner’s

manual.

When working with the vacuum attach-

ment (special accessory), always hold

the unit firmly with both hands.

Wear it with the carrying harness over

the shoulder (see illustration).

:DUQLQJ

To reduce the risk of perso-

nal injury from fire and ex-

plosion, never attempt to

pick up hot or burning sub-

stances (e.g. smoldering

ashes, glowing cigarettes)

or combustible fluids (e.g.

gasoline, paint thinners).

:DUQLQJ

In order to reduce the risk of injury from

contact with rotating parts and damage

to the motor, the intake screen must

always be screwed in place when the

suction tube is not mounted.

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6725,1*

Use only identical STIHL replacement

parts for maintenance and repair.

Use of parts manufactured by others

may cause serious or fatal injury.

Follow the maintenance and repair

instructions in the appropriate section of

your owner’s manual. Refer to the

maintenance chart at the last pages of

this manual.

:DUQLQJ

Always stop the engine and make sure

that the fan is stopped before doing any

maintenance or repair work or cleaning

the blower. Do not attempt any mainten-

ance or repair work not described in

your owner’s manual. Have such work

performed at your STIHL service shop

only.

Check fuel filler cap for leaks at regular

intervals. Use the specified spark plug

and make sure it and the ignition lead

are always in good condition.

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326BA002 LÄ

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:DUQLQJ

A worn or damaged muffler is a fire

hazard and may cause loss of hearing.

Check to see that the muffler is in good

condition. The blower must not be opera-

ted if the muffler is not functioning pro-

perly or has been removed.

Remember that the risk of forest fires is

greater in hot weather. Use the spark

arresting muffler supplied with the unit.

Never touch a hot muffler or burn will

result.

:DUQLQJ

In order to reduce the risk of fire, do not

modify or remove any part of the muffler

or spark arrestor.

Keep spark plug and wire connection

tight and clean. The spark plug electrode

gap should be checked with a feeler

gauge at least every 50 operating hours

and reset if necessary. Fit a new spark

plug if the electrodes are badly pitted.

Store blower in a dry, high or locked

location place and out of reach of

children.

Before storing for longer than a few

days, always empty the fuel tank.

For any maintenance please refer to the

maintenance chart DQGWRWKHZDUUDQW\

VWDWHPHQW near the end of this manual.



The BG 75 comes standard as a blower.

A vacuum attachment* is available for

user installation which can be used to

pick up leaves, grass and similar

materials.

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•Line up the dots on the tube and

housing and then push the blower

tube  onto the housing stub .

•Tighten down the clamp .

* Special accessory

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Before using the vacuum attachment for

the first time:

•Fit the elbow inside the catcher bag.

It is necessary to remove the blower

tube and fit the elbow with catcher bag

in its place.

•Release the clamp.

•Pull the blower tube off the fan hou-

sing stub.

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•Remove the screws  from the

starter cover.

•Mount the handle  - insert the

screws (M5x25) in the starter cover

and one screw  (P6x19) at the

underside of the unit and tighten

down.

•Remove screw  from intake

screen  - fold the screen down.

•Push suction tube 

over intake  on fan housing.

•Fit the hose clamp  and tighten

it down.

•Fit elbow of catcher bag  on the

fan housing stub .

•Attach the carrying strap .

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326BA035 KN

1

2

3

44

6

4

326BA036 KN

5

12

13

8

10

11

326BA037 KN

7

9

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This engine is certified to operate on

unleaded gasoline and with the

mix ratio 50:1.

Your two-stroke engine requires a

mixture of brand-name gasoline and

quality two-stroke engine oil with the

classification TC.

Use regular branded unleaded gasoline

with a minimum octane rating of

90 RON (U.S.A./Canada: pump octane

min. 89!). If the octane number of the

regular grade gasoline in your area is

lower use premium unleaded fuel.

Fuel with a lower octane rating may

result in preignition (causing "pinging")

which is accompanied by an increase in

engine temperature. This, in turn,

increases the risk of the piston seizure

and damage to the engine.

The chemical composition of the fuel is

also important. Some fuel additives not

only detrimentally affect elastomers

(carburetor diaphragms, oil seals, fuel

lines etc.), but magnesium castings as

well. This could cause running problems

or even damage the engine. For this

reason it is essential that you use only

name branded fuels!

Use only STIHL two-stroke engine oil or

equivalent branded two-stroke air-

cooled engine oils with the classification

TC for mixing.

We recommend STIHL 50:1 two-stroke

engine oil since it is specially formulated

for use in STIHL engines.

Do not use BIA or TCW (two-stroke

water cooled) mix oils!

Take care when handling gasoline.

Avoid direct contact with the skin and

avoid inhaling fuel vapour.

The canister should be kept tightly

closed in order to avoid any moisture

getting into the mixture.

The fuel tank and the canister in which

fuel mix is stored should be cleaned

from time to time.

)XHOPL[DJHV

Only mix sufficient fuel for a few days

work, not to exceed 3 months of storage.

Store in approved safety fuel-canisters

only. When mixing, pour oil into the

canister first, and then add gasoline.

Gaso- Oil (STIHL 50:1 or

line equivalent branded TC oils)

US gal. US fl.oz

1 2.6

2 1/2 6.4

512.8

Dispose empty mixing-oil canisters only

at authorized disposal locations.

)XHOLQJ

Before fueling, clean the filler cap

and the area around it to ensure that no

dirt falls into the tank.

Always thoroughly shake the mixture in

the canister before fueling your machine.

:DUQLQJ

In order to reduce the risk of burns or

other personal injury from escaping gas

vapor and fumes, remove the fuel filler

cap carefully so as to allow any pressure

build-up in the tank to release slowly.

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After fueling, tighten fuel cap

as securely as possible by hand.

389BA031 KN

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•Observe safety precautions - see

chapter "Safety Precautions" in this

manual.

To start the engine, move the

slide control  to 

position.

Squeeze the throttle trigger  and

move the slide control to P

at the same time.

•Let go of throttle trigger.

•Release the slide control =

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Set the choke lever :

for cold start to J

for warm start to H

(even if engine has been

running but is still cold)

Press the fuel pump bulb 

at least five times.

Change the fuel pick up body every year.

Before storing your machine for a long

period, drain and clean the fuel tank and

run engine until carburetor is dry.

6WDUWLQJ

326BA010 LÄ

326BA011 LÄ

389BA032 KN

 %*

•Put the unit on the ground.

•Make sure you have a firm footing:

Hold the unit with your left hand and

press it firmly against the ground.

•Pull the starter grip slowly with your

right hand until you feel it engage -

and then give it a brisk strong pull.

Do not pull out starter rope more

than 30" (75 cm) - it might break.

Do not let the starter grip snap back.

•Guide it back slowly so that starter

rope can rewind properly.

When engine begins to fire:

•Move choke lever to H

and continue cranking.

$VVRRQDVHQJLQHUXQVblip the

throttle trigger, the slide

control then moves to the

"Run" position 

and the returns to idling speed.

•To shut down the engine:

Move the slide control to .

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$OORZHQJLQHWRZDUPXS.

•As soon as engine runs:

•Blip the throttle trigger =

slide control moves to the

"Run" position 

engine returns to idling speed.

•Open throttle slightly - warm up

engine for short period.

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If you did not move the choke

lever to H

quickly enough after the engine

began to fire, the combustion

chamber hasflooded.

Remove spark plug terminal .

•Unscrew and dry off the

spark plug.

•Set slide control to "0".

•Engage the throttle fully.

•Pull the starter rope several

times to clear the combustion

chamber.

•Refit the spark plug and connect

the spark plug terminal.

•Set slide control to 

•Set choke lever to H

even if engine is cold.

•Now start the engine.

326BA012 LÄ

326BA013 LÄ

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Press fuel pump bulb 

at least 5 times.

•Now start the engine.

The blower is designed for single-

handed operation. The operator can grip

the handle on the housing in his right or

left hand.

A large area can be covered with the

wide nozzle.

The wide nozzle generates a flat air-

stream which can be used highly specifi-

cally and effectively since the outlet is

near ground level.

The blower’s wide nozzle is particularly

effective for clearing large areas covered

with sawdust, fallen leaves or cut

grass etc.

7KHPDFKLQHPXVWDOZD\VEHVZLW

FKHGRIIFRPSOHWHO\EHIRUHXQGHU

WDNLQJDQ\DOWHUDWLRQV (risk of injury

due to the circulating fan wheel).

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Be wary of small animals when blow-

sweeping or vaccuming leaves. To avoid

possible injuries in such situations, do

not run the unit at high revs.

326BA014 LÄ

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326BA004 LÄ

 %*

When using the blower as a vacuum

cleaner (vacuum attachment as special

accessory), the carrying strap on the

catcher bag is placed over the left

shoulder and the right arm is guided by

the carrying strap. The left hand grips

the handle on the housing, the right

hand gripping the carrying handle.

Large leaves, cardboard or pieces of

bark can be taken up by the suction

tube with its large diameter.

Never take up wet leaves as they may

clog the fan!

To minimize blowing time, use rakes

and brooms to loosen debris before

blowing.

Recommended working techniques to

minimize airborne debris and pollution:

•In dusty conditions, slightly dampen

surfaces.

•Use the full blower nozzle

extension so the air stream can

work close to the ground.

•Do not direct debris at subjects

such as open windows or freshly-

washed cars.

•After using blowers, clean up. Do

not blow debris onto neighbouring

properties.

Recommended working techniques to

minimize noise:

•Operate power equipment only at

reasonable hours - not early in the

morning, late at night or during the

noon-break when people might be

disturbed. Comply with times listed

in local ordinances. Usual recom-

mendations are 9:00 a.m. to 12:00

a.m. and 03:00 p.m. to 5:00 p.m. on

workdays for professionals. Special

considerations should be given to

neighbours on weekends.

•Fewer engines mean less noise;

therefore use only one piece of

power equipment at a time, when

possible.

•Operate power blowers at the

lowest possible throttle speed to do

the job.

•Check your equipment before

operation, especially the muffler, air

intakes and air filters.

Conserve water by using power blowers

instead of hoses for those lawn and

garden applications where a blower can

be properly used, such as cleaning

patios or porches.

326BA002 LÄ

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Dirty air filters reduce engine power,

increase fuel consumption and make

starting more difficult.

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SRZHU

•Move choke lever to J

Press in the tab .

Ease the filter cover 

over the tab and lift it off.

•Clean away loose dirt from around

the filter.

•Remove the foam  and felt 

filter elements.

•Wash the foam element in a clean,

non-flammable cleaning solution

(e.g. warm soapy water) and then

dry.

•Fit a new felt filter element. As a

temporary measure you can knock

it out on the palm of your hand or

blow it out with compressed air.

Don’t wash.

Always replace damaged filter elements.

•Install the foam element  in the

filter cover

•Place felt element  (lettering

facing inward) in filter housing .

•Fit the felt cover  so that it snaps

into position.

The carburetor comes with a standard

setting.

This is the optimum setting to ensure

your machine will operate reliably

with the lowest possible emissions

under most operating conditions.

6WDQGDUGVHWWLQJ

If it is necessary to readjust the car-

buretor from scratch, first carry out the

standard setting.

Turn

+high speed adjusting screw and

/low speed adjusting screw counter-

clockwise (richer) as far as stop.

•Check air filter and clean it if neces-

sary.

•Warm up the engine.

•Set idle speed correctly.

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326BA015 KN

1

2

23

355BA031 KN

45

355BA032 KN

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Exhaust emissions are controlled by the

design of the fundamental engine

parameters and components

(e.g. carburetion, ignition, timing and

valve or port timing) without the addition

of any major hardware.

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Carry out the standard setting.

Turn the idle speed adjusting screw /$

clockwise until the engine runs smoothly.

Your carburetor does not have a high

speed adjusting screw (H screw). Adjust-

ment of maximum engine speed is not

necessary.

The carburetor is set at the factory to

guarantee an optimum fuel-air mixture

under all operating conditions.

Idling and part-load emissions are mini-

mized by limiting the idle mixture.

•Check the air filter and clean it if

necessary.

•Warm up the engine.

•Carefully screw the low speed

screw / down onto its seat. Then

open it one turn counterclockwise

(standard setting, / )

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(QJLQHVWRSVZKLOHLGOLQJ

Check standard setting.

(L screw must be one turn open)

Turn the idle speed screw /$ clock-

wise until the engine runs smoothly.

If the engine is down on power, check

the spark arresting screen in the muffler.

•Remove the housing

Take out the screw.

Take out the spark arresting

screen .

•Clean the spark arresting screen.

•If screen is damaged or heavily

carbonized, fit a new one.

•Install the spark arresting screen.

•Mount the housing.

326BA018 LÄ

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L

LA

L

326BA031 KN

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326BA024 KN

1

326BA025 KN

2

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Wrong fuel mix (too much engine oil in

the gasoline), a dirty air filter and

unfavorable running conditions (mostly

at part throttle etc.) affect the condition of

the spark plug. These factors cause

deposits to form on the insulator nose

which may result in trouble in operation.

If engine is down on power, difficult to

start or runs poorly at idling speed,

first check the spark plug.

•Remove spark plug -

see chapter “Starting”:

•Clean dirty spark plug.

•Check electrode gap -

it should be 0.5mm/0.02" $ -

readjust if necessary.

•Use only resistor type spark plugs

of the approved range.

Rectify problems which have caused

fouling of spark plug:

Incorrect carburetor setting, too much oil

in fuel mix, dirty air filter,

unfavorable running conditions, e.g.

operating at part load.

•Fit a new spark plug after

approx. 100 operating hours -

or earlier if the electrodes are

badly eroded.

:DUQLQJ

To reduce the risk of fire and burn injury,

use only spark plugs authorized by

STIHL (see “Specifications”). Always

press spark plug boot  snugly onto

spark plug terminal  of the proper

size. (Note: If terminal has detachable

SAE adapter nut, it must be attached.)

A loose connection between spark plug

terminal and ignition wire connector in

the boot may create arcing that could

ignite combustible fumes and cause a

fire.

000BA036 TR

1

000BA039 KN

A

 %*

•Slacken off the housing screws.

Remove the three screws .

Lift the starter cover  off

the engine 

(if vac attachment is fitted, remove

handle before starter cover)

Take out the screw .

•Remove the rope rotor very

carefully - the rewind spring is

seated in the rope rotor

and may pop out, uncoil and

cause injury if care is not taken.

Release spring tension by pulling

starter handle out serval inches.

Hold pulley to prevent rebound.

Pull rope. Slowly release spring

tension by allowing pulley to unwind

until all tension is gone.

•Use a screwdriver to ease the cap

out of the starter grip.

•Remove remaining rope from the

rotor and grip, making sure the

ElastoStart sleeve is not pushed

out of the grip.

•Tie a simple overhand knot in the

end of the new starter rope and

then thread rope through the top of

the grip and the rope bush .

•Refit the cap in the grip.

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R

1

2

3

326BA029 KN

326BA026 KN

4

326BA027 KN

5

%* 

•Pull the rope through the rotor and

secure it with a simple overhand

knot.

•Lubricate rope rotor bore with

non-resinous oil.

•Push rotor onto the starter post -

turn back and forth until loop of

rewind spring engages.

•Insert screw and tighten down

securely.

7HQVLRQLQJUHZLQGVSULQJ

•Make a loop in the starter rope

and use it to turn the rope rotor

six full revolutions counter-

clockwise.

Hold the rotor steady -

straighten the twisted rope -

release the rotor -

let go of rope slowly so that it

winds onto the rotor.

The starter grip must be firmly

seated in the rope guide bush.

If grip droops to one side:

Add one more turn on rope rotor

to increase spring tension.

326BA028 KN

355BA020

355BA021 KN

 %*

When starter rope is fully extended,

it must be possible to rotate the rotor

another one half turn.

If this is not the case,

the spring is overtensioned and

could break.

Take one turn of rope off the

rotor.

•Secure the starter cover.

•Tighten down the housing screws

firmly.

5HSODFLQJDEURNHQUHZLQGVSULQJ

•Lubricate the new spring with a

few drops of non-resinous oil -

do not open the wire retainer.

•Remove the rope rotor.

•Remove parts of old spring.

•Fit the new spring -

position outer spring loop in the

recess - the wire retainer

slips off in this process.

If the spring pops out and uncoils:

Refit it in the counterclockwise

direction -

start outside and work

inward.

•Install the rope rotor.

•Tension the rewind spring.

•Fit the starter cover.

•Tighten down the housing screws

firmly.

355BA022 KN

a = 2mm

(0.08in)

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A factory new machine should not be

run at high revs (full throttle off load) for

the first three tank fillings. This avoids

unnecessary high loads during the

break-in period.

As all moving parts have to bed in

during the break-in period, the

frictional resistances in the engine

are greater during this period.

The engine develops its maximum

power after about 5 to 15 tank fillings.

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After a long period of full-throttle

operation, allow engine to run for a while

at idle speed so that the heat in the

engine can be dissipated by flow of

cooling air. This protects engine-

mounted components (ignition,

carburetor) from thermal overload.

$IWHUILQLVKLQJZRUN

Storing for a short period:

Wait for engine to cool down. To avoid

condensation, fill the fuell tank and

keep the unit in a dry place until you

need it again.

Storing for an long period:

see chapter "Storing the Machine".

2SHUDWLQJ,QVWUXFWLRQV

%* 

Please note that the following maintenance intervals apply for normal operating

conditions only. If your daily working time is longer than normal or operating

conditions are difficult (very dusty work area) shorten the specified intervals

accordingly.

before

starting work

after finishiing

work or daily

after each

refueling stop

weekly

monthly

if faulty

if damaged

as required

see page:

Complete machine Visual inspection (condition, leaks) xx

Clean x

Control handle Check operation xx 11

Air filter Clean x15

Replace x15

Filter in fuel tank Check x11

Replace felt and strainer x11

Fuel tank Clean x11

Carburetor Check idle adjustment x x 15-16

Idle setting x 15-16

Spark plug Readjust electrode gap x17

Cylinder fins Clean x

Spark arresting screen in muffler Inspect x16

Clean or replace x16

All accessible screws and nuts

(not adjusting screws) Retighten x

0DLQWHQDQFH&KDUW

The user of this unit should carry out

only the maintenance operations

described in this manual. Other repair

work may be performed only by an

authorized STIHL Service dealer.

:DUUDQW\FODLPVIROORZLQJUHSDLUV

FDQEHDFFHSWHGRQO\LIWKHUHSDLU

KDVEHHQSHUIRUPHGE\DQDXWKRUL]HG

67,+/6HUYLFHGHDOHUXVLQJRULJLQDO

67,+/VSDUHSDUWV

Original STIHL parts can be identified

by the STlHL part number, the

T logo and the STIHL parts

symbol  The symbol may appear

alone on small parts.

 %*

6SHFLILFDWLRQV

(QJLQH

Single cylinder two-stroke engine

Displacement: 1.55 cu.in

(25.4 cm3)

Bore: (1.34 in) 34 mm

Stroke: (1.10 in) 28 mm

Engine power: 0.75 kW (1.00 HP)

Max. permissible

engine speed: See "Adjusting the

Carburetor"

Idle speed: 2,800 r.p.m.

Bystanders noise per

ANSI B 175.2-1990 69 dB (A)

Air flow rate 640 m3/h (377 cfm)

Air velocity 60 m/s (198 ft/s)

,JQLWLRQ6\VWHP

Type: Electronic

(breakerless)

magneto ignition

park plug Bosch WSR 6 F

(suppressed): or

NGK BPMR 7 A;

Electrode gap: 0.02 in (0.5 mm)

Spark plug thread: M 14 x 1.25;

0.37 in (9.5 mm)

long

)XHO6\VWHP

Carburetor: All position

diaphragm

carburetor

with integral fuel

pump

Air filter: Foam and felt

elements

Fuel tank capacity: 0.9 US pt (0.5 L)

Fuel mixture: See chapter

"Fuel Mix"

Weight: (complete unit

w/out tools)

9.4 lb (4.3 kg)

6SHFLDO$FFHVVRULHV

Vacuum attachment kit:

4227 007 1000

Gutter cleaning kit:

4227 007 1005

For periods of about 3 months or longer:

•Remove the blower tube and

nozzle.

•Drain and clean the fuel tank.

•Run engine until carburetor is dry -

this helps prevent the carburetor

diaphragms sticking together.

•Thoroughly clean the machine -

pay special attention to the

cylinder fins and air filter.

•Store the machine in a dry, high

or locked location - out of the

reach of children and other

unauthorized persons.

6WRULQJWKH0DFKLQH

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<RXU:DUUDQW\5LJKWV

DQG2EOLJDWLRQV

The U.S. Environmental Protection

Agency (EPA), the California Air

Resources Board (CARB) and STIHL

Incorporated are pleased to explain the

Emission Control System Warranty on

your model year 2000 and later equip-

ment type engine. In California, new

small off-road engines must be designed,

built and equipped to meet the State’s

stringent anti-smog standards. In other

states, new 1997 and later model year

small off-road equipment engines must

be designed, built and equipped, at the

time of sale, to meet the U.S. EPA

regulations for small non road engines.

The equipment engine must be free from

defects in materials and workmanship

which cause it to fail to conform with

U.S. EPA standards for the first two

years of engine use from the date of

sale to the ultimate purchaser.

STIHL Incorporated must warrant the

emission control system on your small

off-road engine for the period of time

listed below provided there has been no

abuse, neglect or improper maintenance

of your small off-road equipment engine.

Your emission control system includes

parts such as the carburetor and the

ignition system. Also included may be

hoses, and connectors and other

emission related assemblies.

Where a warrantable condition exists,

STIHL Incorporated will repair your small

off-road equipment engine at no cost to

you, including diagnosis (if the diagnostic

work is performed at an authorized

dealer), parts, and labor.

0DQXIDFWXUHU¶V:DUUDQW\&RYHUDJH

The small off-road equipment engines

are warranted for two years in California.

In other states, 1997 and later model

year small off-road equipment engines

are also warranted for two years. If any

emission-related part on your engine is

defective, the part will be repaired or

replaced by STIHL Incorporated free of

charge.

2ZQHU¶V:DUUDQW\5HVSRQVLELOLWLHV

As the small off-road equipment engine

owner, you are responsible for the per-

formance of the required maintenance

listed in your owner’s manual. STIHL

Incorporated recommends that you

retain all receipts covering maintenance

on your small off-road equipment engine,

but STIHL Incorporated cannot deny

warranty solely for the lack of receipts or

for your failure to ensure the perform-

ance of all scheduled maintenance.

Any replacement part or service that is

equivalent in performance and durability

may be used in non-warranty mainten-

ance or repairs, and shall not reduce the

warranty obligations of the engine

manufacturer.

As the small off-road equipment engine

owner, you should be aware, however,

that STIHL Incorporated may deny you

warranty coverage if your small off-road

equipment engine or a part has failed

due to abuse, neglect, improper mainten-

ance or unapproved modifications.

You are responsible for presenting your

small off-road equipment engine to a

STIHL service center as soon as a

problem exists. The warranty repairs will

be completed in a reasonable amount of

time, not to exceed 30 days.

If you have any questions regarding

your warranty rights and responsibilities,

please contact a STIHL customer

service representative at 1-800-467-

8445 or you can write to STIHL Inc.,

536 Viking Drive, P.O. Box 2015,

Virginia Beach, VA 23450-2015.

&RYHUDJHE\67,+/,QFRUSRUDWHG

STIHL Incorporated warrants to the

ultimate purchaser and each subsequent

purchaser that your small off-road

equipment engine will be designed,

built and equipped, at the time of sale,

to meet all applicable regulations. STIHL

Incorporated also warrants to the initial

purchaser and each subsequent

purchaser that your engine is free from

defects in materials and workmanship

which cause the engine to fail to

conform with applicable regulations for a

period of two years.

 %*

:DUUDQW\3HULRG

The warranty periods will begin on the

date the utility equipment engine is

purchased by the initial purchaser and

you have signed and sent back the

warranty card to STIHL. If any emission

related part on your engine is defective,

the part will be replaced by STIHL

Incorporated at no cost to the owner.

Any warranted part which is not

scheduled for replacement as required

maintenance, or which is scheduled only

for regular inspection to the effect of

"repair or replace as necessary" will be

warranted for the warranty period.

Any warranted part which is scheduled

for replacement as required mainten-

ance will be warranted for the period of

time up to the first scheduled replace-

ment point for that part.

'LDJQRVLV

You, as the owner, shall not be charged

for diagnostic labor which leads to the

determination that a warranted part is

defective. However, if you claim warranty

for a component and the machine is

tested as non-defective, STIHL

Incorporated will charge you for the cost

of the emission test.

Mechanical diagnostic work will be

performed at an authorized STIHL

servicing dealer. Emission test may be

performed either at STIHL Incorporated

or at any independent test laboratory.

:DUUDQW\:RUN

STIHL Incorporated shall remedy

war-ranty defects at any authorized

STIHL servicing dealer or warranty

station. Any such work shall be free of

charge to the owner if it is determined

that a warranted part is defective. Any

manufacturer-approved or equivalent

replacement part may be used for any

warranty mainten-ance or repairs on

emission-related parts and must be

provided without charge to the owner.

STIHL Incorporated is liable for damages

to other engine components caused by

the failure of a warranted part still under

warranty.

The California Air Resources Board’s

Emission Warranty Parts List specifically

defines the emission-related warranted

parts. These warranted parts are:

Carburetor

Choke (Cold start enrichment system)

Intake manifold

Air filter

Spark plug

Magneto or electronic ignition system

(ignition module)

Catalytic converter (if applicable)

Fasteners

:KHUHWRPDNHDFODLPIRU:DUUDQW\

6HUYLFH

Bring the product to any authorized

STIHL servicing dealer and present the

signed warranty card.

0DLQWHQDQFH5HTXLUHPHQWV

The maintenance instructions in this

manual are based on the application of

the recommended 2-stroke fuel-oil

mixture (see also instruction "Fuel").

Deviations from this recommendation

regarding quality and mixing ratio of fuel

and oil may require shorter maintenance

intervals.

/LPLWDWLRQV

This Emission Control Systems

Warranty shall not cover any of the

following:

- repair or replacement required

because of misuse, neglect or lack of

required maintenance,

- repairs improperly performed or

replacements not conforming to

STIHL Incorporated specifications that

adversely affect performance and/or

durability, and alterations or

modifications not recommended or

approved in writing by STIHL

Incorporated,

and

- replacement of parts and other

services and adjustments necessary

for required maintenance at and after

the first scheduled replacement point.

%* 

/

&WARNING!

The engine exhaust from this product

contains chemicals known to the State

of California to cause cancer, birth

defects or other reproductive harm.

englisch/english U.S.A.lCARB/EPA