Stihl 090 User manual

Congratulationsl

You

are

the

owner

of a

precision-manufactured

STlHL

chain

saw

designed

to

give

you

long

and

dependable

service.

To

receive

maximum

performance

and

satisfaction

from

your

STlHL

chain

saw,

it

is

important

that

you

read

and

understand

the

maintenance

and

safety

precautions

before

using

your

saw.

Contact

your

STlHL

Dealer

or

the

SllHL

Distributor

for

your

area

if

you

do

not

understand

any

of

the

instructions

or

warnings

in

this

Manual.

This

Manual

contains

warnings

regarding

your

saw,

operating

and

safety

instructions for all

STlHL

090

series

power

saws.

WarningI

Because

a

chain

saw

is

a

high-speed

wood-cutting

tool,

some

special

safety

precautions

must

be

observed

as

with

any

other

power

saw

to

reduce

the

risk of

personal

acci-

dents.

Careless

or

improper

use

may

cause

serious

or

even

fatal

injury.

It

is

important

that

you

fully

understand

'the

contents

of

this

Manual

and

that

you

allow

only

persons

who

understand

this

Manual

to

operate

your

chain

saw.

Pay

special

attention

to

the

safety

precautions

and

cutting

techniques

outlined

on

pages

4

to

19.

STIHL!s

philosophy

Is

to

continually

improve

all

of its pro-

ducts.

As

a

result,

engineering

changes

and

improvements

are

made

from

time-to-time.

Written

notices

relating

to

such

changes

are

sent

to

STIHL

Dealers.

Ifthe

operating

characteristics

of

the

appearance

ofyour

saw

differs

from

those

described

in

this

Manual,

please

contact

your

local

STlHL

Dealer

for

updated

information

and

assistance.

0458

166

0121.

MO,7S.AO.1:

Printed In

West

Germany x

8nHL

090,

090

AY,

090

G

InstructionManual/Owner'sManuals, .

Sharpeningand Maintenance

of

SawChains

Contents

Parts of

the

Chain

Saw

Satety

Precautions

-

The

Operator

-The

Saw

-

The

Use

of

the

Saw

-

Maintaining

and

Storing

the

Saw

Mounting

Guide

Bar

and

Chain

Fuel

Chain

Oil

Helpers

Handle

Starting

011

Quantity

Control

Cutting

Attachment

Air

Filter

Carburetor

.

Replacing

the

Chain

Sprocket

Gear

Lubricant

090 G

Rewind

Starter

Maintenance

Chart

Specifications

Sharpening

and

Maintenance

of

Saw

Chain

STIHL~

C

1990

Andreas

Stlhl,

Walblingen

Andreas Stihl

D-7050W8lblingen

2

4

6

19

20

22

23

24

27

28

30

31

32

33

34

36

37

39

1

Parts

of

the

Chain Saw

4 Front hand Guide

5 Front handle bar nose 3

6 tenninal Guide

bar

2

of filter cover

Bumper spike

13

9 Clutch

l'

O'lain catcher 15

Oil

hand

Chain

16

12

Oil

22 Chain

23

Choke lever

18

throttle lock

19

25 Slarter throttle lock

20

2

Defil1llfOns

1.

Oilo~

Saw

Chain. A

J09P

~

of

cutters.

tie straps

~drive

links.

.

','

~,.-

2. Guide Bar.

Su_~:ijuJdes

the

saw

chain.

.

";.,:

)"'~:

~:/r~

3. Gu

..

~rNose.:~~,paitoftheguidebar.

4.

~

~auarii.-~.::\~

afnst

ro..

~

.,."

PI,

ag P

jecting

~fInd

helps preventthe left

hand

from

touchi

ttcEt

Ch8tn

if

It

slipsoff

the

handle bar•

•

0<

,.:,._.,..J!~t

",,-of

..

'

',',

',,,,,

, ,

5.

FrontHandle.

Handle

bar

for

the left

hand

atfront

of

saw.

6.

Sp;idc

Plug

TemdnaL Connects the spark

plug

with

1he

i9nHiOn

Wire.

7.

Lock'or-Filter

Cover. For

remoVing

filter cover, per-

rnitS1Uter

to.be

cIearied.:

8.

,

Rear'Handle-The

Support

handJe

forthe right hand,

. Iocited at

or

tOward

the

rear

of

the

saw.

9.

Oil

Fftier

~For

closing

the

011

tank.

10.

Stop

Switch. Switches

the

engine's

ignition

system

off

and

stops the

running

of

the

engine.

11.

Oil Hand Pump.

For

additional

manual

c::;haln

lubri-

cation..

12.

011

Inspection

WIiu:Iow.

For

contrO'mng

the

chain

011

level.

13. BUmper

~

Toothed

stop

for

holding

saw

steady

againSt

wood.

14.

ClUtch.

C()upJes

engine

to

chain sprocket

when

engine

is accelerated beyond Idle

speed.

15.

Chain

Catcher. Catches a broken chain

and

guides

Itinside

the

chain

sprocket COVet

""~~~~\'

16.

cta8fr.

8prf;K=ket.

The toothed wheel that drives the

sawctUll~

.

17.

Chain.Sprock8t

Cover. Covers the clutch and the

sproClCet.

18.

Choke

Lever.

Eases engine starting

by

enriching

~ixlure.

19.

StartfngThrottle Lock.

Keeps

the throttle partualJy

~n

~ring

starting.

20.

~

Throttle

Look.

Must

be

depressed before

~

the

throttle

trigger.

21.

Throttle

TrIgger. Controls

the

speed ofthe

engine.

22. ChaInGuard(Scabbard). Protects

the

operator

from

touchil1$1

the

chain.

23. DecompfessionValve. Makesstarting easier.

24.

Muffler.

Attenuates

exhaust noises

and

diverts ex-

haust

gases

i~,

req~lreQ

~on.

25.

Starter

~'The,

grip

Of

the,

pull

,starter.

which is

the

device

to

start the engine.

26.

Fuel

FlUer

Cap.

For

closing

the

fuel tank.

3

Safety Precautions

The

use

ofanychain sawmay

be

hazardous.

The

saw

chain

has

large,

sharp cutters. If the cutters contact your

flesh,

they

will

cut

you,

ewn

Hthe

chain,

is not

m9VIns.'

At

full

throttle, the chain

speed

can

reach

45

mph

'(20

ri1Is).

It is

important that

you

read,

fully

understand

and

observe the

following .

safetY

precautions

and

.

warningS.

;Read

the

owner's

manual and the safety'

inStructions

periOdically.

Pay

special attention to the section

on

reactive

forces,

pages

10

to 13.

Warning!

Reactive

forces,

including

kickback,

can

be

dangerous.

Careless or improper use of any chain

saw

may

cause

seriousorfatallnjuiy. . ' , .

All

safety precautions that are generally

observed

when

workingwith Bnaxeora'hand

saW

aisoapply

~

the'opefa-

lion

of

chain

saws.

HOWever;

beCause

'8

Chain

saw

is a

hlghspeed,

fast cutting power

tool,~a1

safety

pre-

cautions

mustbe

obSerVed

to

reduce

,tti~~

risk of

personal

accidents. .-.

Have

your

,STIHL

dealer

show

you

how

to operate

your

chain

saw.

ObserVe

all

appllCabra'~

safetY

'regulations,

standards

and

ordinances.

,Warning!

4 Minors should never

be

allowed

to

use

a

chain

saw.

2

Bystanders,

espedallychildren

and

anim~s

should

.not

be

allowed in the area where a chain saw is

in

use

(ill.

1).

Neverletlt\esaw

run

unattended.

$.Ore

itina

locked

place

away

from

'Children

and

empty

the fuel

tank

before

stonng

for longerthan afew

days.

. .

Do

not

lend

Y'0ur

chain saw without the Owner's

Manual.

Be

sure

that

'anyone'

'using

,yO~'saw

understands

the

information contained in this Manual.

Thesesafetyprecautions

and

waqlingsapply

to

the

use

of

all

STlHL

~n

saws.

Different

~odc$

may

have

~erent

parts

and

controls. See the 'appropriate section of your

Owner's

Manual for a description of the controls

and

function of

the'

p8rts

ofyour model

saw.

Safe

use

ofa chain

SaW

involves

t the operator

2. the saw

3. the

uSe

ofthe

saw.

THE

OPERATOR

Physical

Condition

You

must

be

in good physical condition and

mental

health

and

not under the influence of

any

substance

(drugs,

alcohol),

which might impairvision, dexterity

or

judgment.

Do

not

operate a chain saw when

you

are fatigued

(UI.

2).

Be

alert

.:..

H

you

'get tired while

operating

yOlir ctiain

saw,

take.

a

~r~ak.

tiredness

may

result

,in

.1oSs~f

co~.

Working

vVith

aity,chaiO

saw.

can

De

'Strenu()us.

If

you

have

any

.

conditiOn

tfiat

inight

..

be

aggravated by 'strenuous

work.

check

with

yourdoctor

befOre

operating achain

saw.

~!

PtoIonged.~

ofcl1ain saws (orother

m~ines)

exposing

the

operator to vibrations may produce Whitefinger dis-

ease

(Raynaud's phenomenon). This phenomenon redu-

ces

the hand's ability to

feel.

and regulate temperature,

produces

numbness andburriing sensations

and

may

•

cause

nerve

and

circulation damage

and

tissue necrosis.

MinySTIHL

models

are'

available with

an

anti-vibration

system

designed to reduce engine 'vibration.

An

anti-

vibration system is recommended for those using chain

saws

on

aregular orsustained basis.

Heated

handles help to reduce the risk of Whit8finger

diseaseand

are

recommended forcold weather

use.

Most

STlHL

Powerheads

are availablewith heated handles.

Anti-vibration

sYstems

and

he~ecI

handles do not gua-

rantee

that

you

will not,sustainWhitefinger

d"lS8ase~

There-

fore continual

and

regular users'should 'monitor clOsely

.their

use

ofchain saws

and

theirphysical condition.

ProperClothing .

'.

CIOthil1Q

'musfbe stUrdy

and

snug-fitting. but allow

c0m-

plete

fieedom

of'

movement.

AvOId

Ioose-fitting jackets,

~

~.jeweirY.

~

or~

pants,

or

anYthing

thatcould

become

entangled

with the

saw

orbrush. Wear

ove~~

o~

jeans

with'

a reinforced

cutting

resistant insert

(Ill

3). , . .

p.

your hands with gloves when handling saw

and

saW

chain.

Heavy-duty, nonslip gloves improve your grip

and

protectyour

hands.

Good

footing is most Important

in

chain

saw work.

Wear

sturdy boots

with

nonslip soles. Steel-toed safety boots

are

recommended.

. ,"

>.

Proper

eye

protection

Is

a must. Non-fogging, vented

goggles or a.face screen is recommended. Their use

reducesthe risk ofeye

injury.

" "

Wear

an

approved safety

hard

hat

to

protect your

head.

Chain

saw

noisemaydarriage your hearing. Always wear

sound barriers (ear plugs

or

earmuffters)

to

protect your

hearing.

Continual

and regular users should have ·their hearing

checked

regularty.

5

4

THE

SAW

Parts

of

the

chain

saw;

Illustrations

and

definitions

of the

parts

see

pages

2 and

31

~I

NevermodHy a

chain

saw

in

any

way.

Only

attachments

supplied

by

STlHL

or expressly

appro~,!)y

STlHL

,for

use

with

the

specific

STlHL

saw

modelS

,are.

authorized.

Although

certain

unauthorized

attachmentsaie

useable

with

the

STlHL

powerhead.

their

use

may,

in

fact,

.be

extremely dangerous. '

THE

USE

OF

THESAW

TranSportingthe

chain

saw

W8ming!

AJW8yS

Stop

the

enQtne

before'pUtting

a

chain

saw

down or

carryi~

~.

~

.chain'

sti~;with

~'

engine

running

is extteinely

dangerous.

'A'CCidentaJ

acceleration

of the

engine

eancsuse

the

chain to

rotate.

Avoid

touchmg

the

hotmUffter.' .

.~

.

6

By

hand:

When

carrying

your

saw

by

hand,

the

'engine

must

be

stopped

and

the

saw

must

be

in

the

proper

position.

Grip

~e

front

handle

and

place

themuffleratthe

'side

away

from

the

body

(i1l.4).

" .

1tl8'

c;hafn

-guard

(scabbard)

~Uld

tie

over

the

chain

and

the

gu~

barWhfCh

~rd

P9fljt

b8ckwards.

When

carrying

your

~

barsttouldbebehind

you

(i1l.4).

By

vehicle: When transporting in a

vehicle,

keep

chain

EiI19

bar,

~v~red

with the

ch~n.guard.,

Properly

,secure

your

saw

to

prevent

turnover,

fuel

SpHlage

and

damage

to

the

saW.

" .

Prepaf8tion

forihe

use

of

the

saw

T~

offthe

chain

guard

and

inspectforsafetyin

operation.

For

assemblY

please

foUow

~

procedure described at

the

appropriate

section "Mounting

the

Bar

and

Chafn" of

yourowner's

Manual.

'

STlHb-Oilornatic

chain,

guide

bar

and

sprocket

must

match

eaCh

other:'

' " .

."

If

the,

g~i48

~r

'or chain Is

~1aC8dt

it

must

be

with

a bar

or

Ch8In

ofthe

same

type.

ReplaCement

with

another

type

of

guide baror

chain

'wiD

seriously

increase

the

00,ances

,of

ope~

iF.ljury

~ue

t()

the

Contact

of

the

'moving

chain

with

.~

operator

during

n;rtational

kicIcb8ck.

W8rnirig!

Proper

tension

of

the

chain is extremely important. In order

to

av~

~

.setting the

tensiol1ing

~we

must

'be

fot~

as,

d~

in

Y9ur

~"'M~,~ys

~re

~h,e*agoraarn~s>'fotthesp~coveriS(~)~

seCuteJy

after

tensioning,

~e

.chaffL

CheCk

Chain

t~n

once'~

after

t:taving.

tigtlte.ned

the

n~

and thereafter

at

regular

intervals

(Whenever

the

saw

is

shut

off).

If

the

chain

becomes loosewhile cutting,

shut

offthe

engine

and

then

tighten.

Nevertry to tighten thechain

while

theengine

is runningl

5

Fueling

-

Your

STlHL

chain

saw

uses

an

oll-gasoline mixture for

fuel

(seechapter"

Fuel

n ofyour

Owner's

Manual).

Warning!

Gasoline

is

an

extremely

flammable

fuel.

Use

extreme

caution

when

handling

gasoline or

fuel

mix.

Do

not

smoke

or

bring

any

fire

or

flame nearthe

fuel

(ill. 5).

Fueling

Instructions

Fuel

your

Chain

saw

in well-ventilated

areas,

outdoors

only.

Always

shut off the

engine

and

allow

It to

cool

before

refueling.

Relieve

fuel

tank

pressure

by

loosening

fuel

cap

slowly.

Select

bare

ground

for fueling

and

move

at

least

10

feet

(3

m)

from

fueling spotbefore starting the

~ngine.

Wipe

off

any

spilled

fuel

before

starting your

saw

and

check

for

leakage.

Check

for

fuel

leakage

while

refueling

and

during

operation.

If

fuel

or

011

leakage

is

found,

donotstart or

run

the

engine

until

leak

is

fixed

and

spilled fuel

has

been

wiped

away.

6

Starting

Wamlng!

Your

chain

saw

is

a one-person

saw.

Do

not

allow

other

persons

to

be

near

the

chain

saw.

Start

and

operate

your

saw

without

assistance.

.

For

safe

and

specific starting Instructions.

see

the

appro-

priate

section

ofthe

Owner's

Manual.

Do

not

drop

start.

This

method

is

very dangerous

because

YC?':I

maY.lose

control ofthe

saw

(ill. 6).

Place

the

chain

saw

on

finn

ground

orothersolidsurface

in

an

open

area.

Maintain

a

good

balance

and

secure

footing.

Beabsolutely

sure

thatguidebar

and

chainareclearof

you

and

all

other obstructions

and

objects,

including

the

ground:

because

when

the

engine starts

at

starting-

throttl~,

engine

speed

will be fast

enough

fOr

the

clutch to

engage

sprocket

and

tum the

chain,

which

may

cause

kickback

to

occur.

Engage

the

chain

brake

when

starting a

QuiclCstop

model.

(see

chapter

"Chain Brake"

in

yourOwner's

Manual).

7

8

Never attempt to start the

saw

when

the guide

bar

is

in

a

cut or

kerf.

When

you

pull

the

starter grip, don't

wrap

the starter

rope

around

your

hands.

Do

not allow

the

gripto

snap

back,

but

guide

the

starter

rope

slowly back to permit

the

rope

to

rewind

properly.

Failure

to followthis

probedure

may

result

in

injury to

hand

or

fingers

and

may

damage

the

starter

mechanism.

Importantadjustments

Warning!

At

correct idle

speed,

chain

should

not

turn.

For

directions

to

adjust idle

speed,

see

the appropriate

section ofthis Owner's

Manual.

Do

not

use

a

saw

with incorrect idle

speed

adjustment.

Adjust

the

idle

speed

your

..

self according.to the'appro-

priate section ofthis

manual.

Have

your

STIHL

Dealercheck your

saw

and

make

proper

adjustmentsor

repairs.

.

Afteradjusting achain start the

saw,

letthe

engine

run

fora

while,

then

switch engine off

and

recheck

chain

tension.

Proper

chain

tension

Is

very importantat

all

times.

Working COl\dltlons

Operate your

chain

saw

onlyoutdoorsinaventilatedarea.

Operate the saw under good visibility

and

daylight condi-

tionsonly.

Warning!

Take

extreme care in

wet

and

freezing

weather

(rain,

snow,

ice).

Put

off the work

when

the weather is

.

windy,

stormy or rainfall is

heavy.

Clear the

area

where

you

are working.

7

Warning,!

Avoid

stumbling

on

obstacles

such

as

stumps,

roots or

rocks

and

watCh

out for holes or ditches.

Be

extremely cautious when working

on

slopes or

uneven

ground.

There

is increased danger of slipping on freshly

debarked

logs.

.

CuttingInstructions

Grip:

Always

hold the saw firmly

with

both hands

when

..

the

engine

is

running. Place your lefthandon front

handle

bar

and

yourrighthand

on

rear

,handle

and

throttle trigger

..

Left-handers should followthis instruction

too.

Wrap

your fingers tightly

around

the handles, keeping

the

handles cradled between yourthumb

and

forefinger

(ill.

7),

With your

hands

inthis position,

you

can

bestoppose

and

absorb the

push,

pull

and

kickback forces of your

saw

without

having

itslipout

of

yourgrip

(see

sectionof

reactive

forces).

Make

sure yourchain

saw

handles

and

grip

are

in

good

condition

and

free ofmoisture, pitch, oil or

grease.

Wamlngl'Never

use

the

saw

with one

hand.

You

cannot

control reactive forces (see pages

10

to

13)

and

may

lose

control ofthe

saw.

warning!

Do

not

operate

your

chain

saw

with

starting

throttle.

Cutting

with

starting throttle

does

not

permit

the

operator

proper

control

ofthe

saw

or

chain

speed.

Wamingl

Never

touch

a

rotating

chain

with

your

hand or

any

part

ofyour

body.

Wamlngl

Do

not

cut

any

material

other

than

wood

or

wooden

objects.

Use

your

chain

saw

for

cutting

only.

It is

not

designed

for

prying

or

shoveling

away

limbs,

roots

or

other

objects.

When

sawing,

make

sure

that

the

saw

chain

does

not

touch

any

foreign

materials

such

as

rocks,

nails

and

the

like

(ill.

8).

Such

objects

may

be flung

off,

damage

the

saw

chain

or

cause

the

saw

to

kick

back.

In

order

to

keep

control

of your

saw,

always

maintain

a

firm

foothold.

Never

work

on

a

ladder,

In

a

tree

or

on

any

other

insecure

support.

Neveruse the

saw

above

shoulder

height

(ill.

9).

Position

the

chain

saw

in

such

awaythatyour

body

isclear

of

the

cutting

attachment

wheneverthe

engine

is

running.

Stand

to

the

leftofcutwhile

bucking

(see

ill.

10).

Don't

put

pressure

on

the

saw

when

reaching

the

end

of a

cut.

The

pressure

may

causethe bar

and

rotating

chain

to

pop

out of the

cut

or

kerf,

go

out of

control

and

strike

the

operatoror

some

other object. Ifthe rotating

chain

strikes

some

otherobjectareactiveforce (see

pages

10to

13)

may

cause

the

chain

to

strike the

operator.·

9

Stihl 090 User manual

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