Stihl Km 55 r User manual

Instruction Manual

Manual de instrucciones

Warning!

For safe operation follow all safety

precautions in Instruction Manual - improper

use can cause serious injury.

Advertencia!

Para su seguridad durante el manejo de este

producto, siga siempre las precauciones de

seguridad dadas en el manual de

instrucciones - el uso indebido puede causar

lesiones graves.

STIH)

STIHL KM 55

BA_U1_86_01.fm Seite 0 Donnerstag, 15. Januar 2004 2:57 14

1KM 55

English / USA

BA_SE_110_003_01_06.fmPrinted on chlorine-free paper.

Printing inks contain vegetable oils; paper can be recycled.

0458 461 8621 A. M5. K6. PM. Printed in USA

STIHl

Contents

KombiSystem ................................... 2

Guide to Using this Manual .............. 2

Safety Precautions and

Working Techniques ......................... 3

Approved KombiTools .................... 10

Mounting the Bike Handle .............. 11

Mounting the Loop Handle ............. 12

Fitting the Carrying Eye .................. 14

Fuel ................................................ 14

Fueling ............................................ 15

Starting / Stopping the Engine ........ 15

Operating Instructions .................... 19

Cleaning the Air Filter ..................... 19

Motor Management ........................ 20

Adjusting the Carburetor ................ 20

Catalytic Converter ......................... 22

Checking the Spark Plug ................ 22

Rewind Starter ................................ 23

Storing the Machine ........................ 24

Inspections and Maintenance by

STIHL Service ................................ 24

Maintenance Chart ......................... 25

Main Parts and Controls ................. 26

Specifications ................................. 28

Special Accessories ....................... 29

Maintenance and Repairs ............... 29

STIHL Incorporated

Federal Emission Control

Warranty Statement ........................ 30

STIHL Incorporated California

Exhaust and Evaporative Emissions

Control Warranty Statement ........... 32

Trademarks .................................... 34

Allow only persons who understand the

manuals of the KombiEngine and the

KombiTool to operate your power tool.

To receive maximum performance and

satisfaction from your STIHL power tool,

it is important that you read and

understand the maintenance and safety

precautions, starting on page 4, before

using your power tool.

Contact your STIHL dealer or the STIHL

distributor for your area if you do not

understand any of the instructions in the

two manuals.

English / USA

KM 55

!Warning!

Because this power tool is a high-speed

working tool, some special safety

precautions must be observed 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 improve-

ments are made from time to time.

Therefore, STIHL cannot be responsible

for changes, modifications or

improvements not covered in this

manual. If the operating characteristics

or the appearance of your power tool

differs from those described in the two

manuals, please contact your STIHL

dealer for information and assistance. In the STIHL KombiSystem a number of

different KombiEngines and KombiTools

can be combined to produce a power

tool. In this instruction manual the

functional unit formed by the

KombiEngine and KombiTool is referred

to as the power tool.

The KombiEngine and KombiTool come

with separate instruction manuals.

Always read and make sure you

understand both instruction manuals

before starting and using your machine.

Keep the manuals in a safe place for

later reference.

Pictograms

All the pictograms attached to the

machine are shown and explained in

this manual.

The operating and handling instructions

are supported by illustrations.

Symbols in text

The individual steps or procedures

described in the manual may be marked

in different ways:

:A bullet marks a step or procedure

without direct reference to an

illustration.

A description of a step or procedure that

refers directly to an illustration may

contain item numbers that appear in the

illustration.

Example:

Loosen the screw (1)

Lever (2) ...

KombiSystem

002BA159 KN

Guide to Using this Manual

3KM 55

English / USA

In addition to the operating instructions,

this manual may contain paragraphs

that require your special attention. Such

paragraphs are marked with the

symbols described below:

Warning where there is a risk of an

accident or personal injury or

serious damage to property.

Caution where there is a risk of

damaging the machine or its

individual components.

Note or hint which is not essential

for using the machine, but may

improve the operator’s under-

standing of the situation and result

in better use of the machine.

Note or hint on correct procedure in

order to avoid damage to the

environment.

Equipment and features

This instruction manual may refer to

several models with different

features. Components that are not

installed on all models and related

applications are marked with an

asterisk (*). Such components may

be available as special accessories

from your STIHL dealer.

Engineering improvements

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 machine differ from

those described in this manual, please

contact your STIHL dealer for

assistance.

Therefore some changes, modifications

and improvements may not be covered

in this manual.

Because this

KombiEngine is the

engine for a high-speed,

power tool, special safety

precautions must be

observed to reduce the

risk of personal injury.

It is important that you

read, fully understand and

observe the following

safety precautions and

warnings. Read the

instruction manuals and

the safety precautions of your

KombiEngine and KombiTool

periodically. Careless or improper use

may cause serious or fatal injury.

Have your STIHL dealer show you how

to operate your power tool. Observe all

applicable local safety regulations,

standards and ordinances.

!Warning!

Do not lend or rent your power tool

without the instruction manuals. Be sure

that anyone using it understands the

information contained in these manuals.

Safety Precautions and

Working Techniques

English / USA

KM 55

!Warning!

Minors should never be allowed to use

this power tool. Bystanders, especially

children, and animals should not be

allowed in the area where it is in use.

!Warning!

To reduce the risk of injury to bystanders

and damage to property, never let your

power tool run unattended. When it is

not in use (e.g. during a work break),

shut it off and make sure that

unauthorized persons do not use it.

Most of these safety precautions and

warnings apply to the use of all STIHL

power tools. Different models may have

different parts and controls. See the

appropriate section of your

KombiEngine and KombiTool instruction

manuals for a description of the controls

and the function of the parts of your

model.

Safe use of a KombiEngine involves

1. the operator

2. the power tool

3. the use of the power tool.

THE OPERATOR

Physical Condition

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

this machine when you are fatigued.

!Warning!

Be alert – if you get tired, take a break.

Tiredness may result in loss of control.

Working with any power tool can be

strenuous. If you have any condition that

might be aggravated by strenuous work,

check with your doctor before operating

this machine.

!Warning!

Prolonged use of a power tool (or other

machines) exposing the operator to

vibrations may produce whitefinger

disease (Raynaud's phenomenon) or

carpal tunnel syndrome.

These conditions 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.

All factors which contribute to white-

finger disease are not known, but cold

weather, smoking and diseases or

physical conditions that affect blood

vessels and blood transport, as well as

high vibration levels and long periods of

exposure to vibration are mentioned as

factors in the development of whitefinger

disease. In order to reduce the risk of

whitefinger disease and carpal tunnel

syndrome, please note the following:

– Most STIHL power tools are

available with an anti-vibration

(“AV”) system designed to reduce

the transmission of vibrations

created by the engine to the

operator's hands. An AV system is

recommended for those persons

using power tools on a regular or

sustained basis.

– Wear gloves and keep your hands

warm.

– Keep the AV system well

maintained. A power tool with loose

components or with damaged or

worn AV buffers will tend to have

higher vibration levels.

– Maintain a firm grip at all times, but

do not squeeze the handles with

constant, excessive pressure. Take

frequent breaks.

5KM 55

English / USA

All the above-mentioned precautions do

not guarantee that you will not sustain

whitefinger disease or carpal tunnel

syndrome. Therefore, continual and

regular users should closely monitor the

condition of their hands and fingers. If

any of the above symptoms appear,

seek medical advice immediately.

!Warning!

The ignition system of the STIHL unit

produces an electromagnetic field of a

very low intensity. This field may

interfere with some pacemakers. To

reduce the risk of serious or fatal injury,

persons with a pacemaker should

consult their physician and the

pacemaker manufacturer before

operating this tool.

Proper Clothing

!Warning!

To reduce the risk of injury, the operator

should wear proper protective apparel.

!Warning!

Power tool noise may

damage your hearing.

Wear sound barriers (ear

plugs or ear mufflers) to

protect your hearing.

Continual and regular

users should have their hearing checked

regularly.

Be particularly alert and cautious when

wearing hearing protection because

your ability to hear warnings (shouts,

alarms, etc.) is restricted.

For further instructions on proper

clothing see the safety precautions in

the instruction manual of the KombiTool

you are using.

THE POWER TOOL

For illustrations and definitions of the

power tool parts see the chapter on

“Main Parts and Controls.”

!Warning!

Never modify this power tool in any way.

Only attachments supplied by STIHL or

expressly approved by STIHL for use

with the specific STIHL KombiEngine

model are authorized. Although certain

unauthorized attachments are useable

with STIHL power tools, their use may, in

fact, be extremely dangerous.

If this tool is subjected to unusually high

loads for which it was not designed (e.g.

heavy impact or a fall), always check

that it is in good condition before

continuing work. Check in particular that

the fuel system is tight (no leaks) and

that the controls and safety devices are

working properly. Do not continue

operating this machine if it is damaged.

In case of doubt, have it checked by your

STIHL servicing dealer.

English / USA

KM 55

THE USE OF THE POWER TOOL

Transporting the Power Tool

!Warning!

Always switch off the engine and make

sure the working tool has stopped before

putting a power tool down. When

transporting your power tool in a vehicle,

properly secure it to prevent turnover,

fuel spillage and damage to the power

tool.

Fuel

Your STIHL power tool uses an oil-

gasoline mixture for fuel (see the chap-

ter on “Fuel” of your instruction manual).

!Warning!

Gasoline is an extremely

flammable fuel. If spilled

and 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 or the power tool. Note that

combustible fuel vapor may escape from

the fuel system.

Fueling Instructions

!Warning!

Fuel your power tool in well-ventilated

areas, outdoors. Always shut off the

engine and allow it to cool before

refueling. Gasoline vapor pressure may

build up inside the fuel tank depending

on the fuel used, the weather conditions

and the tank venting system.

In order to reduce the risk of burns and

other personal injury from escaping gas

vapor and fumes, remove the fuel filler

cap on your power tool carefully so as to

allow any pressure build-up in the tank

to release slowly. Never remove the fuel

filler cap while the 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

machine.

!Warning!

Check for fuel leakage while refueling

and during operation. If fuel leakage is

found, do not start or run the engine until

the leak is fixed and any spilled fuel has

been wiped away. Take care not to get

fuel on your clothing. If this happens,

change your clothing immediately.

Different models may be equipped with

different fuel caps.

Cap with grip

!Warning!

In order to reduce the risk of fuel spillage

and fire from an improperly tightened

fuel cap, correctly position and tighten

the fuel cap in the fuel tank opening.

To do this with this STIHL

cap, raise the grip on the

top of the cap until it is

upright at a 90° angle.

Insert the cap in the fuel

tank opening with the

triangular marks on the grip of the cap

and on the fuel tank opening lining up.

Using the grip, turn the cap firmly

clockwise as far as it will go (approx. a

quarter turn).

Fold the grip flush with the

top of the cap. If the grip

does not lie completely

flush with the cap and the

detent on the grip does

not fit in the

corresponding recess in the filler neck,

the cap is not properly seated and

tightened and you must repeat the

above steps.

7KM 55

English / USA

Screw cap

!Warning!

Unit vibrations can cause

an improperly tightened

fuel filler cap to loosen or

come off and spill

quantities of fuel. In order

to reduce the risk of fuel

spillage and fire, tighten the fuel filler cap

by hand as securely as possible.

Before Starting

!Warning!

Always check your KombiEngine for

proper condition and operation before

starting, particularly the throttle trigger,

throttle trigger interlock, stop switch and

working tool. The throttle trigger (if

applicable) must move freely and always

spring back to the idle position. Never

attempt to modify the controls or safety

devices.

!Warning!

Never use a power tool that is damaged

or not properly maintained.

!Warning!

Check that the spark plug boot is

securely mounted on the spark plug –a

loose boot may cause arcing that could

ignite combustible fumes and cause a

fire.

Keep the handles clean and dry at all

times; it is particularly important to keep

them free of moisture, pitch, oil, grease

or resin in order for you to maintain a firm

grip and properly control your power

tool.

Starting

Start the engine at least 10 feet

(3 meters) from the fueling spot,

outdoors only.

For specific starting instructions, see the

appropriate section of your

KombiEngine and KombiTool manuals.

Place the power tool on firm ground or

other solid surface in an open area.

Maintain good balance and secure

footing.

!Warning!

To reduce the risk of injury from loss of

control, be absolutely sure that the

working tool is clear of you and all other

obstructions and objects, including the

ground, because when the engine starts

at starting-throttle, engine speed will be

fast enough for the clutch to engage and

move the working tool.

!Warning!

Your power tool is a one-person

machine. Do not allow other persons in

the general work area, even when

starting.

!Warning!

To reduce the risk of injury from loss of

control, do not attempt to “drop start”

your power tool.

!Warning!

When you pull the starter grip, do not

wrap the starter rope around your hand.

Do not let the grip snap back, but guide

the starter rope to rewind it properly.

Failure to follow this procedure may

result in injury to your hand or fingers

and may damage the starter

mechanism.

See also the safety precautions on

Starting in the instruction manual of the

KombiTool.

English / USA

KM 55

Important Adjustments

!Warning!

To reduce the risk of personal injury from

loss of control or contact with the

running working tool, do not use a power

tool with incorrect idle adjustment. At

correct idle speed, the working tool

should not move. For directions on how

to adjust idle speed, see the appropriate

section of your instruction manual. If you

cannot set the correct idle speed, have

your STIHL dealer check your power

tool and make proper adjustments and

repairs.

During Operation

Holding and controlling the power

tool

Always hold the unit firmly with both

hands on the handles while you are

working. Wrap your fingers and thumbs

around the handles.

Your right hand should grip the rear

handle. This also applies to left-handers.

Working conditions

Operate and start your power tool only

outdoors in a well ventilated area.

Operate it under good visibility and

daylight conditions only. Work carefully.

!Warning!

As soon as the engine is

running, this product

generates toxic exhaust

fumes containing

chemicals (such as

unburned hydrocarbons

and carbon monoxide) known to cause

respiratory problems, cancer, birth

defects, or other reproductive harm.

Some of the gases (e.g. carbon

monoxide) may be colorless and

odorless. To reduce the risk of serious or

fatal injury/illness from inhaling toxic

fumes, never run the machine indoors or

in poorly ventilated locations.

Operating instructions

!Warning!

Do not operate your power tool using the

starting throttle lock, as you do not have

control of the engine speed.

In the event of an emergency, switch off

the engine immediately – move the slide

control / stop switch to 0or STOP.

!Warning!

The muffler and other parts of the engine

(e.g. fins of the cylinder, spark plug)

become hot during operation and remain

hot for a while after stopping the engine.

To reduce risk of burns do not touch the

muffler and other parts while they are

hot.

!Warning!

To reduce the risk of fire and burn injury,

keep the area around the muffler clean.

Remove excess lubricant and all debris

such as pine needles, branches or

leaves. Let the engine cool down sitting

on concrete, metal, bare ground or solid

wood (e.g. the trunk of a felled tree)

away from any combustible substances.

!Warning!

Never modify your muffler. The muffler

could be damaged and cause an

increase in heat radiation or sparks,

thereby increasing the risk of fire and

burn injury. You may also permanently

damage the engine. Have your muffler

serviced and repaired by your STIHL

servicing dealer only.

002BA057 KN

9KM 55

English / USA

Catalytic converter

!Warning!

Some STIHL power tools

are equipped with a

catalytic converter, which

is designed to reduce the

exhaust emissions of the

engine by a chemical

process in the muffler. Due to this

process, the muffler does not cool down

as rapidly as conventional mufflers when

the engine returns to idle or is shut off.

To reduce the risk of fire and burn

injuries, the following specific safety

precautions must be observed.

!Warning!

Since a muffler with a catalytic converter

cools down less rapidly than conven-

tional mufflers, always set your power

tool down in the upright position and

never locate it where the muffler is near

dry brush, grass, wood chips or other

combustible materials while it is still hot.

!Warning!

An improperly mounted or damaged

cylinder housing or a damaged/

deformed muffler shell may interfere

with the cooling process of the catalytic

converter. To reduce the risk of fire or

burn injury, do not continue work with a

damaged or improperly mounted

cylinder housing or a damaged/

deformed muffler shell.

Your catalytic converter is furnished with

screens designed to reduce the risk of

fire from the emission of hot particles.

Due to the heat from the catalytic

reaction, these screens will normally

stay clean and need no service or

maintenance. If you experience loss of

performance and you suspect a clogged

screen, have your muffler maintained by

a STIHL servicing dealer.

MAINTENANCE, REPAIR AND

STORING

Maintenance, replacement, or repair

of the emission control devices and

systems may be performed by any

nonroad engine repair establishment

or individual. However, if you make a

warranty claim for a component

which has not been serviced or

maintained properly or if

nonapproved replacement parts were

used, STIHL may deny coverage.

!Warning!

Use only identical STIHL replacement

parts for maintenance and repair. Use of

non STIHL parts may cause serious or

fatal injury.

Strictly follow the maintenance and

repair instructions in the appropriate

section of your KombiEngine and

KombiTool instruction manuals. Please

refer to the maintenance charts

respectively the maintenance notes in

these manuals.

English / USA

KM 55

!Warning!

Always stop the engine and make sure

that the working tool is stopped before

doing any maintenance or repair work or

cleaning the power tool. Do not attempt

any maintenance or repair work not

described in your KombiEngine and

KombiTool instruction manuals. Have

such work performed by your STIHL

servicing dealer only.

!Warning!

Use the specified spark plug and make

sure it and the ignition lead are always

clean and in good condition. 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 boot and

the ignition wire connector in the boot

may create arcing that could ignite

combustible fumes and cause a fire.

!Warning!

Never test the ignition system with the

ignition wire boot removed from the

spark plug or with a removed spark plug,

since uncontained sparking may cause

a fire.

!Warning!

Do not operate your power tool if the

muffler is damaged, missing or modified.

An improperly maintained muffler will

increase the risk of fire and hearing loss.

If your muffler was equipped with a

spark-arresting screen to reduce the risk

of fire, never operate your power tool if

the screen is missing or damaged.

Remember that the risk of forest fires is

greater in hot or dry weather.

Store the power tool in a dry and high or

locked location out of reach of children.

Before storing for longer than a few

days, always empty the fuel tank. See

chapter "Storing the machine" in this

manual.

Approved KombiTools

11KM 55

English / USA

The following STIHL KombiTools may be

mounted on the KombiEngine

1) Barrier bar must be mounted on

loop handle

2) Unsuitable or not approved for

KombiEngines with bike handle

Fitting the handlebar

:Place the clamp (1) and handle

support (2) on the drive tube (3).

:Position the handlebar (4) in the

handle support – the rubber grip (5)

must be on the left (viewed from

engine).

:Place clamp (6) on handle support.

:Insert screws (7) in the holes and

screw down as far as stop in clamp.

:Secure handlebar (4) on the drive

tube (3) at distance (A) of approx.

15 cm (6 in) from the powerhead.

:Align the handlebar.

:Tighten down the screws firmly.

KombiTool Purpose

FS-KM Brushcutter with

mowing head

FS-KM 1) Brushcutter with

grass cutting blade

HL-KM 0/90° 1) 2) Hedge trimmer,

adjustable

HL-KM 135° 1) 2) Hedge trimmer,

adjustable

HL-KM 0° 2) Hedge trimmer

FH-KM 1) Power scythe

HT-KM 2) Pole pruner

BF-KM 1) Pick tine cultivator

FCB-KM 2)

FCS-KM 2) Power edger

KB-KM 2) Bristle brush

KW-KM 2) PowerSweep

Mounting the Bike Handle

233BA025 KN

233BA018 KN

English / USA

KM 55

Fitting the control handle

:Release the screw (8) and remove it

with the washer. The nut (9) remains

in the control handle (10).

:Push the control handle onto the

handlebar (4) – the throttle trigger

(11) must point towards the

gearhead.

:Line up the holes (12).

:Fit screw and washer in control

handle and tighten down firmly.

* see “Guide to Using this Manual”

Fitting the throttle cable

Do not kink the throttle cable - make

sure the throttle trigger moves freely.

:Push the throttle cable (13) into the

retainer (14).

Loop handle with barrier bar

:Insert square nuts (1) in the

barrier bar (2).

:Line up the holes.

233BA038 KN

233BA027 KN

Mounting the Loop Handle

002BA098 KN

13KM 55

English / USA

:Place the clamp (3) in the loop

handle (4) and position them both

against the drive tube (5).

:Fit the clamp (6) and place the

barrier bar (2) in position.

Note correct position.

:Line up the holes.

:Insert screws (7) in holes and screw

them into the barrier bar as far as

stop.

:Go to “Securing the loop handle”.

Loop handle without barrier bar

:Place the clamp (3) in the loop

handle (4) and position them both

against the drive tube (5).

:Fit the clamp (6) and line up the

holes.

:Fit washers (7) on screws (8).

:Insert screws (8) in holes and screw

on the square nuts (1) as far as

stop.

:Go to “Securing the loop handle”.

Securing the loop handle

:Secure the loop handle (4)

approx. 8”/20cm (A) forward of

the control handle (9).

:Line up the loop handle.

:Tighten down the screws firmly –

lock the nuts if necessary.

10= Sleeve*

* see “Guide to Using this Manual”

002BA099 KN

002BA136 KN

002BA147 KN

English / USA

KM 55

:For position of carrying eye1) see

"Parts and Controls"

:Place the clamp (1) with the

tapped hole on the left-hand side

of the drive tube.

:Squeeze the two ends of the clamp

together and hold in that position.

:Insert M 6 x 14 screw (2).

:Line up the carrying eye.

:Tighten down the screw firmly.

1) Included as standard or available as

special accessory

This engine is certified to operate on

unleaded gasoline and the STIHL two-

stroke engine oil at a mix ratio of 50:1.

Your engine requires a mixture of high-

quality gasoline and quality two-stroke

air cooled engine oil.

Use mid-grade unleaded gasoline with a

minimum octane rating of 89 (R+M/2). If

the octane rating of the mid-grade

gasoline in your area is lower, use

premium unleaded fuel.

Fuel with a lower octane rating may

increase engine temperatures. This, in

turn, increases the risk of 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 and

catalytic converters as well. This could

cause running problems or even

damage the engine. For this reason

STIHL recommends that you use only

nationally recognized high-quality

unleaded gasoline!

Use only STIHL two-stroke engine oil or

equivalent high-quality two-stroke

engine oils that are designed for use

only in air cooled two-cycle engines.

We recommend STIHL 50:1 two-stroke

engine oil since it is specially formulated

for use in STlHL engines.

Do not use BIA or TCW rated (two-

stroke water cooled) mix oils or other

mix oils that state they are for use in both

water cooled and air cooled engines

(e.g., outboard motors, snowmobiles,

chainsaws, mopeds, etc.).

Take care when handling gasoline.

Avoid direct contact with the skin and

avoid inhaling fuel vapor. When filling at

the pump, first remove the canister from

your vehicle and place the canister on

the ground before filling. Do not fill fuel

canisters that are sitting in or on a

vehicle.

The canister should be kept tightly

closed in order to avoid any moisture

getting into the mixture.

The machine‘s fuel tank and the canister

in which fuel mix is stored should be

cleaned as necessary.

Fitting the Carrying Eye

002BA142 KN

Fuel

15KM 55

English / USA

Fuel mix ages

Only mix sufficient fuel for a few days

work, not to exceed 3 months of storage.

Store in approved fuel-canisters only.

When mixing, pour oil into the canister

first, and then add gasoline. Close the

canister and shake it vigorously by hand

to ensure proper mixing of the oil with

the fuel.

Dispose of empty mixing-oil canisters

only at authorized disposal locations.

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.

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.

After fueling, tighten fuel cap as

securely as possible by hand.

Version with Bike Handle

Controls

Throttle trigger interlock (1), throttle

trigger (2) and slide control (3) with the

positions:

START (4)

The normal run position #(5)

and

STOP–O (6) – to stop engine, move

slide control in direction of c(7).

Gaso-

line

Oil (STIHL 50:1 or

equivalent high-quality oils)

US gal. US fl.oz

12.6

2 1/2 6.4

5 12.8

Fueling

232BA046 KN

Starting / Stopping

the Engine

STOP

233BA037 KN

English / USA

KM 55

Starting

:Hold down the trigger interlock and

squeeze the throttle trigger.

:Keep both levers in that position.

:Move the slide control to START

position and hold it there.

:Now release the throttle trigger,

slide control and trigger interlock in

that order. This is the

starting-throttle position.

:Go to "All Versions"

Version with Loop Handle

Controls

Stop switch (1) with positions:

Normal run position I(2), and

O– Stop (3).

Throttle trigger interlock (4).

Throttle trigger (5) with tongue (6) and

catch (7).

Starting

:Move stop switch to position I

:Hold down throttle trigger interlock.

:Squeeze the throttle trigger until the

catch on the tongue (6) can be

engaged on the housing.

:Release the throttle trigger, tongue

and throttle trigger interlock in that

order. This is the starting throttle

position.

:Go to "All Versions".

233BA034 KN

765

461BA000 KN

17KM 55

English / USA

All Versions

:Set the choke lever (8):

For cold start to g

For warm start to e

– also use this setting if the engine

has been running but is still cold

:Press the fuel pump bulb (9) at least

five times, even if the bulb is still

filled with fuel.

:Place the unit on the ground:

Check that the tool is not touching

the ground or any other obstacles –

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