Stihl KM 90 R Bedienungsanleitung

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STIHL KM 90 R

WARNING

Read Instruction Manual thoroughly

before use and follow all safety

precautions – improper use can

cause serious or fatal injury.

ADVERTENCIA

Antes de usar la máquina lea y siga

todas las precauciones de

seguridad dadas en el manual de

instrucciones – el uso incorrecto

puede causar lesiones graves o

mortales.

Instruction Manual

Manual de instrucciones

Instruction Manual

1 - 31

Manual de instrucciones

32 - 65

Original Instruction ManualPrinted on chlorine-free paper

Printing inks contain vegetable oils, paper can be recycled.

0458-465-8621-C. VA7.M14.

0000000811_013_GB

KM 90 R

English

with electronic systems.

Contents

Allow only persons who fully understand

the manuals of the KombiEngine and the

KombiTool to operate this power tool

combination.

To receive maximum performance and

satisfaction from your STIHL power tool,

it is important that you read, understand

and follow the safety precautions and

the operating and maintenance

instructions in chapter "Safety

Precautions and Working Techniques"

before using your power tool. For further

information you can go to

www.stihlusa.com.

Contact your STIHL dealer or the STIHL

distributor for your area if you do not

understand any of the instructions in the

two manuals.

WARNING

Because this KombiEngine is the engine

for a high-speed power 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.

KombiSystem 2

Guide to Using this Manual 2

Safety Precautions and Working

Techniques 3

Approved KombiTools 10

Mounting the Loop Handle 11

Adjusting the Throttle Cable 12

4-MIX Engine 12

Fuel 12

Fueling 13

Starting / Stopping the Engine 14

Operating Instructions 16

Cleaning the Air Filter 17

Engine Management 17

Adjusting the Carburetor 17

Spark Arresting Screen in Muffler 18

Spark Plug 18

Rewind Starter 20

Storing the Machine 20

Inspections and Maintenance by

Dealer 20

Maintenance and Care 21

Main Parts 23

Specifications 24

Maintenance and Repairs 25

Disposal 25

STIHL Incorporated Federal

Emission Control Warranty

Statement 26

STIHL Incorporated California

Exhaust and Evaporative

Emissions Control Warranty

Statement 28

Trademarks 30

KM 90 R

English

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.

Therefore, the separate instruction

manuals for the KombiEngine and

KombiTool should be used together for

the power tool.

Always read and and make sure you

understand both instruction manuals

before using your power tool for the first

time and keep them in a safe place for

future reference.

Pictograms

The meanings of the pictograms

attached to or embossed on the

machine are explained in this manual.

Depending on the model concerned, the

following pictograms may be on your

machine.

Symbols in Text

Many operating and safety instructions

are supported by illustrations.

The individual steps or procedures

described in the manual may be marked

in different ways:

NA bullet marks a step or procedure.

A description of a step or procedure that

refers directly to an illustration may

contain item numbers that appear in the

illustration. Example:

NLoosen the screw (1).

NLever (2) ...

In addition to the operating instructions,

this manual may contain paragraphs

that require your special attention. Such

paragraphs are marked with the

symbols and signal words described

below:

DANGER

Indicates an imminent risk of severe or

fatal injury.

WARNING

Indicates a hazardous situation which, if

not avoided, could result in severe or

fatal injury.

NOTICE

Indicates a risk of property damage,

including damage to the machine or its

individual components.

KombiSystem

002BA530 KN

Guide to Using this Manual

Fuel tank for gasoline

and engine oil mixture

Press to operate decom-

pression valve

Manual fuel pump

Press to operate manual

fuel pump

Filler hole for gear

lubricant

Air intake summer mode

Air intake winter mode

Handle heating

KM 90 R

English

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. Therefore,

some changes, modifications and

improvements may not be covered in

this manual. If the operating

characteristics or the appearance of

your machine differs from those

described in this manual, please contact

your STIHL dealer or the STIHL

distributor for your area for assistance.

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.

Use your power tool only for the

applications described in the instruction

manual of the KombiTool you are using.

WARNING

Do not use it for other purposes, since

misuse may result in personal injury or

property damage, including damage to

the machine.

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.

Do not clean your machine with a

pressure washer. The solid jet of water

may damage parts of the machine.

Safe use of a KombiEngine involves

1. the operator

2. the power tool

3. the use of the power tool

Safety Precautions and

Working Techniques

Because this KombiEn-

gine is the engine for a

high-speed power tool,

special safety precau-

tions must be observed to

reduce the risk of per-

sonal 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.

KM 90 R

English

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

whitefinger 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 machine to the

operator's hands. An AV system is

recommended for those persons

using power tools on a regular or

sustained basis.

–Wear gloves – not while using

KombiTool BG-KM – and keep your

hands warm.

–Keep the AV system well

maintained. A power tool with loose

components or with damaged or

worn AV elements 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.

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

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.

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.

Avoid loose-fitting jack-

ets, scarfs, neckties,

jewelry, flared or cuffed

pants, unconfined long

hair or anything that

could become caught on

branches, brush or the

moving parts of the unit.

Secure hair so it is above

shoulder level.

KM 90 R

English

THE POWER TOOL

For illustrations and definitions of the

power tool parts see the chapter on

"Main Parts."

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.

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

chapter on "Fuel" of your instruction

manual).

WARNING

Fueling Instructions

WARNING

To reduce the risk of serious injury from

burns, never attempt to refuel the unit

until it has been completely removed

from the operator.

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

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.

Gasoline is an extremely

flammable fuel. If spilled

and ignited by a spark or

other ignition source, it

can cause fire and seri-

ous 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 combusti-

ble fuel vapor may

escape from the fuel

system.

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.

KM 90 R

English

WARNING

See also the safety precautions on

Starting in the instruction manual of the

KombiTool.

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

Unit vibrations can cause

an improperly tightened

fuel filler cap to loosen or

come off and spill quanti-

ties of fuel. In order to

reduce the risk of fuel

spillage and fire, tighten

the fuel filler cap by hand

as securely as possible.

KM 90 R

English

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.

WARNING

To reduce the risk of injury from loss of

control, never work on a ladder or on any

other insecure support.

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

Inhalation of certain dusts, especially

organic dusts such as mold or pollen,

can cause susceptible persons to have

an allergic or asthmatic reaction.

Substantial or repeated inhalation of

dust and other airborne contaminants, in

particular those with a smaller particle

size, may cause respiratory or other

illnesses. Control dust at the source

where possible. Use good work

practices, such as operating the unit so

that the wind or operating process

directs any dust raised by the power tool

away from the operator. Follow the

recommendations of

EPA/OSHA/NIOSH and occupational

and trade associations with respect to

dust ("particulate matter"). When the

inhalation of dust cannot be

substantially controlled, i.e., kept at or

near the ambient (background) level, the

operator and any bystanders should

wear a respirator approved by

NIOSH/MSHA for the type of dust

encountered.

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 0 or STOP.

WARNING

Never modify your muffler. Any

modification could cause an increase in

heat radiation, sparks or sound level,

thereby increasing the risk of fire, burn

injury or hearing loss. You may also

permanently damage the engine. Have

your muffler serviced and repaired by

your STIHL servicing dealer only.

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. 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

002BA057 KN

As soon as the engine is

running, this product gen-

erates toxic exhaust

fumes containing chemi-

cals, such as unburned

hydrocarbons (including

benzene) and carbon

monoxide, that are

known to cause respira-

tory problems, cancer,

birth defects, or other

reproductive harm. Some

of the gases (e.g. carbon

monoxide) may be color-

less and odorless. To

reduce the risk of serious

or fatal injury/illness from

inhaling toxic fumes,

never run the machine

indoors or in poorly venti-

lated locations.

KM 90 R

English

sitting on concrete, metal, bare ground

or solid wood away from any

combustible substances.

WARNING

An improperly mounted or damaged

cylinder housing or a

damaged/deformed muffler shell may

interfere with the cooling process of the

muffler. 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 muffler is furnished with a spark

arresting screen designed to reduce the

risk of fire from the emission of hot

particles. Never operate your unit with a

missing or damaged spark arresting

screen. If your gas/oil mix ratio is correct

(i.e., not too rich), this screen will

normally stay clean as a result of the

heat from the muffler 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. Some state or federal laws or

regulations may require a properly

maintained spark arrestor for certain

uses. See the "Maintenance, Repair and

Storing" section of these Safety

Precautions. Remember that the risk of

a brush or forest fire is greater in hot or

dry conditions.

WARNING

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.

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.

Some STIHL power tools

are equipped with a cata-

lytic 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 con-

ventional mufflers when

the engine returns to idle

or is shut off. To reduce

the risk of fire and burn

injuries when using a cat-

alytic converter, 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 materi-

als while it is still hot.

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