Stihl MS 194 C Instruction Manual

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STIHL MS 194 C

Instruction Manual2 - 29

15 16

0000-GXX-7551-A0

English

Contents

1 Introduction................................................. 2

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

3 Overview..................................................... 2

4 Safety Precautions......................................4

5 Preparing the Saw for Operation.............. 10

6 Assembling the Saw................................. 11

7 Engaging and Disengaging the Chain Brake

.................................................................. 12

8 Mixing Fuel and Refueling the Chainsaw..13

9 Starting and Stopping the Engine............. 14

10 Checking the Saw..................................... 16

11 Operating the Saw.................................... 17

12 After Finishing Work..................................22

13 Transporting..............................................22

14 Storing.......................................................22

15 Cleaning....................................................22

16 Maintenance............................................. 24

17 Repairing...................................................25

18 Troubleshooting........................................ 25

19 Specifications............................................27

20 Bar and Chain Combinations.................... 27

21 Spare Parts and Accessories....................28

22 Disposal.................................................... 28

23 EC Declaration of Conformity................... 28

2 Guide to Using this Manual

2.1 Symbols used with warnings in the text

WARNING

■ This symbol indicates dangers that can cause

serious injuries or death. ► The measures indicated can avoid serious

injuries or death.

NOTICE

■ This symbol indicates dangers that can cause

damage to property. ► The measures indicated can avoid damage

to property.

2.2 Symbols in Text

This symbol refers to a chapter in this instruction manual.

3 Overview

3.1 Chainsaw

1 Introduction

Dear Customer,

Thank you for choosing STIHL. We develop and manufacture our quality products to meet our customers’ requirements. The products are designed for reliability even under extreme con‐ ditions.

STIHL also stands for premium service quality. Our dealers guarantee competent advice and instruction as well as comprehensive service support.

STIHL expressly commit themselves to a sus‐ tainable and responsible handling of natural resources. This user manual is intended to help you use your STIHL product safely and in an environmentally friendly manner over a long service life.

We thank you for your confidence in us and hope you will enjoy working with your STIHL product.

Dr. Nikolas Stihl

IMPORTANT! READ BEFORE USING AND KEEP IN A SAFE PLACE FOR REFERENCE.

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1 Carburetor Adjusting Screws

For tuning the carburetor.

Translation of Original Instruction Manual

0000008436_003_GB

Printed on chlorine-free paper

Printing inks contain vegetable oils, paper can be recycled.

0458-528-0121-B. VA0.C21.

3 Overview English

2 Shroud Lock

Secures shroud to chainsaw

3 Spiked Bumper

Toothed stop for holding saw steady against wood while cutting.

4 Guide Bar

Supports and guides the saw chain.

5 Saw Chain

Cuts the wood.

6 Tensioning Screw

Adjusts chain tension.

7 Chain Sprocket

Toothed wheel that drives the chain.

8 Muffler

Reduces chainsaw noise emissions.

9 Chain Sprocket Cover

Covers the chain sprocket and secures the guide bar to the chainsaw.

10 Nut

Secures chain sprocket cover to chainsaw.

11 Chain Catcher

Reduces risk of operator contact with the chain if it comes off the bar or breaks.

12 Front Hand Guard

Helps protect operator’s left hand from con‐ tact with the saw chain, serves to engage the chain brake and activates the chain brake by inertia in certain kickback situations.

13 Shroud

Covers the engine.

14 Handlebar

For holding, controlling and carrying the chainsaw.

15 Air Filter

Filters the air entering the engine.

16 Master Control Lever

For starting, running and stopping the engine.

17 Throttle Trigger Lockout

Unlocks the throttle trigger.

18 Rear Handle

For operating, holding and controlling the chainsaw.

19 Rear Hand Guard

Protects operator’s right hand from contact with the chain if it comes off the bar or breaks.

20 Throttle Lever

Controls engine speed.

21 Spark Plug Boot

Connects ignition lead to spark plug

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22 Spark Plug

Ignites fuel-air mixture in the engine.

23 Manual Fuel Pump

Eases engine starts.

24 Choke Lever

Enriches mixture for engine starts.

25 Starter Grip

Serves to crank the engine.

26 Oil Tank Cap

Closes the oil tank.

27 Fuel Tank Cap

Closes the fuel tank.

28 Chain Scabbard

Helps protect user from contact with saw chain.

# Serial Number

3.2 Symbols

Meanings of symbols that may be on the chain‐ saw:

This symbol marks the fuel tank.

This symbol marks the chain oil tank.

The chain brake is engaged or disen‐ gaged in this direction.

This symbol shows the direction of rotation of the chain.

Rotate in this direction to increase chain tension.

This symbol denotes the manual fuel pump.

Master Control lever is moved in this direc‐ tion to stop the engine.

Master Control lever is moved to this posi‐ tion to stop the engine.

Engine is operated with the Master Control lever in this position.

Engine is started with the Master Control lever in this position.

Engine is made ready for start with the choke lever in this position.

Engine is started with the choke lever in this position.

Guaranteed sound power level accord‐ ing to directive 2000/14/EC in dB(A) in order to make sound emissions of products comparable.

English 4 Safety Precautions

4 Safety Precautions

4.1 Warning Signs

Meanings of warning signs on the chainsaw:

Observe safety notices and take the necessary precautions.

Read, understand and save the instruction manual.

Wear safety glasses, hearing protec‐ tion and a hard hat.

Observe safety notices on kickback and take the necessary precautions.

4.2 Intended Use

The STIHL MS 194 is designed for cutting wood, limbing and felling trees.

WARNING

■ Using the chainsaw for purposes for which it is not designed may result in serious or fatal inju‐ ries and damage to property. ►

Use the chainsaw as described in this instruction manual.

4.3 The Operator

WARNING

■

Users without adequate training or instruction cannot recognize or assess the risks involved in using the chainsaw. The user or other per‐ sons may sustain serious or fatal injuries.

► Read, understand and save the

instruction manual.

► If the chainsaw is passed on to another per‐

son: Always give them the instruction man‐ ual.

►

Make sure the user meets the following requirements:

The user must be rested.

–

The user must be in good physical con‐

–

dition and mental health to operate and work with the chainsaw. The user is able to recognize and

–

assess the risks involved in using the chainsaw. The user must be of legal age or is

–

being trained in a trade under supervi‐

sion in accordance with national rules and regulations. The user has received instruction from a

–

STIHL servicing dealer or other experi‐ enced user before working with the chainsaw for the first time. The user must not be under the influ‐

–

ence of alcohol, medication or drugs.

► If the user is working with a chainsaw for

the first time: Practice cutting logs on a sawhorse or other support.

►

If you have any queries: Contact a STIHL servicing dealer for assistance.

■ The chainsaw’s ignition system produces an electromagnetic field. This field may interfere with some pacemakers. This can result in seri‐ ous or fatal injuries. ►

If the user has a pacemaker: Make sure the pacemaker is not affected.

4.4 Clothing and Equipment

WARNING

■ Long hair can become entangled in the saw during operation. This can result in serious injuries. ►

Tie up long hair so that it is above shoulder level.

■ Objects can be thrown through the air at high speed during operation. This can result in per‐ sonal injury.

► Wear close-fitting safety glasses.

Suitable safety glasses that have been tested and labeled in accord‐ ance with EN 166 or national stand‐ ards are available from retailers.

►

STIHL recommends that you wear a face shield.

► Wear a long-sleeved, snug-fitting upper

garment.

■ Noise occurs during operation. Noise can harm your hearing.

► Wear hearing protection.

■ Falling objects can cause head injuries.

► If there is a danger of falling objects

during operation: Wear a safety hard hat.

■ Dust can be whipped up during operation: Whipped up dust can damage the respiratory passages and cause allergic reactions. ►

If dust is whipped up and forms a cloud: Wear a dust respirator mask.

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4 Safety Precautions English

■ Inappropriate clothing can snag on wood, brush or the saw. Not wearing suitable cloth‐ ing may result in serious injury. ►

Wear snug-fitting clothing.

► Do not wear a scarf or jewelry.

■ The user can come into contact with the rotat‐ ing saw chain during operation. This can result in serious injuries. ►

Wear long trousers with cut-retardant inserts.

■ The user can be cut by the wood during oper‐ ation. The user can come into contact with the saw chain during cleaning and maintenance work. This can result in personal injury. ►

Wear work gloves made of durable mate‐ rial.

■ Wearing unsuitable footwear may cause you to slip or stumble. Contact with the rotating saw chain can result in cuts. This can result in personal injury. ►

Wear chainsaw boots with cut retardant inserts.

4.5 Work Area and Surroundings

WARNING

■ Bystanders, children and animals are not aware of the dangers of the chainsaw or thrown objects. Innocent bystanders, children and animals may be seriously injured and damage to property may occur. ►

Keep bystanders, children and animals

away from the work area. ► Do not leave the chainsaw unattended. ► Make sure that children cannot play with

the chainsaw.

■ Hot exhaust gas is emitted through the muffler while the engine is running. Hot exhaust gas can ignite easily flammable materials and cause a fire. ►

Keep exhaust gas well away from easily flammable materials.

4.6 Safe Condition

4.6.1 Chainsaw

The chainsaw is in a safe condition if the follow‐ ing points are observed:

The chainsaw is not damaged.

–

There is no fuel leaking from the chainsaw.

–

The fuel tank and oil tank caps are closed.

–

The chainsaw is clean.

–

The chain catcher is fitted and undamaged.

–

The chain brake is operating properly.

–

The controls function properly and have not

–

been modified.

The chain lubrication is operating properly.

–

Wear marks on the chain sprocket are not

–

deeper than 0.5 mm. A combination of guide bar and saw chain rec‐

–

ommended in this User Manual is mounted. The guide bar and saw chain are properly

–

mounted. The saw chain is properly tensioned.

–

Only original STIHL accessories designed for

–

this chainsaw model are fitted. The accessories are correctly attached.

–

WARNING

■ If not in safe condition, components may no longer operate correctly, safety devices may be disabled and fuel leakage may occur. This may result in serous or fatal injury to people. ►

Work only with an undamaged chainsaw.

► If fuel is leaking from the chainsaw: Do not

use the chainsaw and contact a STIHL dealer for assistance.

►

Close the fuel tank and oil tank caps. ► If the chainsaw is dirty: Clean the chainsaw. ► Work only with property fitted and undam‐

aged chain catcher. ► Never modify your chainsaw. Exception:

Mounting a combination of guide bar and

saw chain recommended in this User Man‐

ual. ►

If the controls do not function properly: Do

not use your chainsaw. ► Only fit original STIHL accessories

designed for this chainsaw model. ► Mount the guide bar and saw chain as

described in this User Manual. ► Attach accessories as described in this

User Manual or in the User Manual for the

accessories. ►

Never insert objects in the chainsaw’s

openings. ► Replace worn or damaged labels. ► If you have any doubts, be sure to consult a

STIHL dealer.

4.6.2 Guide Bar The guide bar is in a safe condition if the follow‐ ing points are observed:

Guide bar is not damaged.

–

Guide bar is not deformed.

– –

The minimum groove depth is maintained,

19.3. Bar rails are free from burrs.

–

Bar groove is not pinched or splayed.

–

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English 4 Safety Precautions

WARNING

■ If the guide bar is not in a safe condition, it can no longer support and guide the saw chain properly. The rotating saw chain can jump off the guide bar. This can result in serious or fatal injuries. ►

Work only with an undamaged guide bar.

► If the groove depth is less than the mini‐

mum depth: Mount a new guide bar. ► Deburr the guide bar every week. ► If you have any queries: Contact your

STIHL servicing dealer.

4.6.3 Saw Chain The saw chain is in a safe condition if the follow‐ ing points are observed:

Chain is not damaged.

–

Chain is properly sharpened.

–

The service marks on the cutters are still visi‐

–

ble.

WARNING

■ If components do not comply with safety requirements, they will no longer function properly and safety devices may be rendered inoperative. This can result in serious or fatal injuries. ►

Work only with an undamaged saw chain. ► Sharpen the chain properly. ► If you have any queries: Contact your

STIHL servicing dealer for assistance.

4.7 Fuel Mixture and Refueling

WARNING

■

This chainsaw requires a fuel mixture of gaso‐ line and two-stroke engine oil. Fuel mixture and gasoline are extremely flammable. If fuel mixture or gasoline make contact with open fire or hot objects, they can cause a fire or explosion. This can result in serious or fatal injuries and damage to property. ►

Protect fuel mixture and gasoline from heat

and fire. ► Do not spill fuel mixture and gasoline. ► If fuel has been spilled: Wipe up the fuel

with a cloth and do not attempt to start the

engine until all parts of the saw and the

area around it are dry. ►

Do not smoke. ► Never refuel near a fire. ► Shut off the engine and allow it to cool

down before refueling. ► Start the engine at least 3 meters from the

fueling spot, outdoors only.

■ Inhaling fuel fumes and gasoline fumes can have toxic effects. ► Avoid inhaling fuel fumes or gasoline

fumes.

► Refuel in a well-ventilated location.

■ The chainsaw becomes hot during operation, or in a very hot environment. Depending on the type of fuel, altitude, ambient temperature and the temperature of the saw, the fuel expands and can cause a pressure build-up in the tank. Fuel may escape as a spray and ignite when the fuel tank cap is opened. This can result in serious injuries and damage to property. ► Allow the saw to cool down before opening

the tank cap.

► Open the tank cap slowly in stages.

■ Clothing that has been in contact with fuel or gasoline is more easily flammable. This can result in serious or fatal injuries and damage to property. ►

If your clothing comes into contact with fuel or gasoline: Change your clothing.

■ Fuel mix, gasoline and two-stroke engine oil can harm the environment. ► Do not spill fuel, gasoline or two-stroke

engine oil.

► Dispose of fuel mix, gasoline and two-

stroke engine oil in accordance with local regulations and environmental require‐ ments.

■

Fuel, gasoline or two-stroke engine oil can cause irritation if they come into direct contact with the skin or eyes. ►

Avoid contact with fuel, gasoline and twostroke engine oil.

► In case of contact with the skin: Wash

affected areas with plenty of water and soap.

►

In case of contact with the eyes: Rinse eyes with plenty of water for at least 15 minutes and seek medical advice.

■

The saw’s ignition system produces sparks. Unconfined sparks may cause a fire or an explosion in an easily combustible or explo‐ sive environment. This can result in serious or fatal injuries and damage to property. ►

Use the spark plugs described in this

instruction manual. ► Insert and tighten down the spark plug. ► Connect the spark plug boot and press it

down firmly.

■ The saw can be damaged if it is run on a fuel mixture consisting of unsuitable gasoline or an unsuitable two-stroke engine oil or if an incor‐

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4 Safety Precautions English

rect mix ratio of gasoline and two-stroke engine oil is used. ► Mix the fuel as described in this instruction

manual.

■ The mixture of gasoline and two-stroke engine oil can separate if it is stored for a long period. The saw can be damaged if it is used with a fuel mix that has separated. ►

Before refueling the saw: Thoroughly mix the fuel.

► Use a mixture of gasoline and two-stroke

engine oil that is not older than 30 days (STIHL MotoMix: 2 years).

4.8 Working

4.8.1 Cutting

WARNING

■ Always work within calling distance of others in case help is needed. ► Make sure than persons outside the work

area are within calling distance.

■ If the engine is not started properly, the user may lose control of the chainsaw. This can result in serious injuries. ►

Start the engine as described in this instruc‐ tion manual.

► If the saw chain is touching the ground or

objects: Do not start the engine.

■ The user cannot concentrate on the work in certain situations. The user can lose control of the saw, stumble or fall and be seriously injured. ►

Work calmly and carefully.

► If light and visibility are poor: Do not use

your saw. ► Operate the chainsaw alone. ► Do not work above shoulder height. ► Watch out for obstacles. ► Stand on the ground while working and

keep a good balance. If it is necessary to

work at heights: Use a lift bucket or a safe

platform. ►

If you begin to feel tired: Take a break.

■ Exhaust gas is produced when the engine is running. Breathing in exhaust gas can have toxic effects. ►

Avoid inhaling exhaust gas.

► Operate the chainsaw is a well ventilated

location.

► In the event of nausea, headache, visual

disturbances, problems with hearing or diz‐ ziness: Stop work and seek medical advice.

■

The user’s ability to hear and assess noises is restricted when wearing hearing protection with the engine running. ►

Work calmly and carefully.

■ The user will not be able to control the chain‐ saw properly if it is operated with the Master Control lever in position serious injuries. ►

Check that the Master Control lever is in position during operation.

► Start the engine as described in this instruc‐

tion manual.

■ Do not accelerate the engine with the chain brake engaged since this can damage the chain brake. ►

Disengage the chain brake before you start cutting.

■ The rotating saw chain can cut the operator. This can result in serious injuries. ► Do not touch the rotating saw chain. ► If the saw chain is blocked by an object:

Shut off the engine and engage the chain brake. Then remove the object causing the blockage.

■

The rotating chain becomes hot and expands. If the chain is not lubricated sufficiently or not re-tensioned at regular intervals, it may come off the guide bar or break. This can result in serious injuries and damage to property. ►

Use special chain oil.

► Check oil level in tank regularly during cut‐

ting work. Before the oil tank runs empty: Fill up with chain oil.

►

Check chain tension regularly during cutting work. If chain tension is insufficient: Ten‐ sion the chain.

■

If the behavior of the saw changes during operation or feels unusual, it may no longer be in a safe condition. This can result in serious injuries and damage to property. ►

Stop work and contact your STIHL dealer for assistance.

■ Saw vibrations may occur during operation. ► Wear gloves. ► Take regular breaks. ► If signs of circulation problems occur: Seek

medical advice.

■ Sparks may occur if the rotating chain makes contact with a hard object. Sparks may cause a fire in an easily combustible location. This can result in serious or fatal injuries and dam‐ age to property. ►

Do not work in an easily combustible loca‐ tion.

. This can result in

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English 4 Safety Precautions

■ Note that the saw chain continues to rotate for a short period after you release the trigger. The rotating saw chain can cut the user. This can result in serious injuries. ►

Wait for the chain to come to a standstill.

WARNING

The guide bar can be pinched when cutting

■ wood that is under tension. The user can lose

control of the saw and be seriously injured. ►

Make a relieving cut in the compression side (1) first, then perform bucking cut at the tension side (2).

4.8.2 Limbing

WARNING

■ If the underside of the felled tree is limbed first, it will no longer be supported on the ground by branches. The tree can move dur‐ ing cutting work. This can result in serious or fatal injuries. ►

Cut through large limbs on the underside of the tree only after it has been bucked.

► Do not stand on the log while limbing it.

■ A branch may fall to the ground during limbing. The user may trip, fall or be seriously injured. ► Limb from the base to the crown of the tree.

4.8.3 Felling

WARNING

■

Inexperienced users cannot assess the dan‐ gers of felling a tree. This can result in serious or fatal injuries and damage to property. ►

If you have any queries: Do not fell the tree yourself.

■ A tree and branches can fall on bystanders or objects during the felling operation. This can result in serious or fatal injuries and damage to property. ►

Determine direction of fall so that the area in which the tree falls is clear.

► Do not allow bystanders, children or ani‐

mals within 2.5 tree lengths of the felling site.

8 0458-528-0121-B

►

Remove broken or dead branches from the tree crown before felling.

► If broken or dead branches cannot be

removed from the crown: Do not fell the tree.

►

Observe tree crown and crowns of neigh‐ boring trees and keep clear of falling branches.

■

When the tree falls the trunk can break or spring back in the direction of the user. This can result in serious or fatal injuries. ►

Plan an escape path sideways behind the tree.

► Walk backwards along the escape path and

observe the falling tree.

► Do not walk backwards down slopes.

■ Obstacles in the work area and on the escape path can hinder the user. The user may trip and fall. This can result in serious or fatal inju‐ ries. ►

Remove all obstacles from the work area and escape path.

■ If you cut into or through the hinge, stabilizing strap or holding strap too soon, the intended direction of fall cannot be controlled or the tree can fall prematurely. This can result in serious or fatal injuries and damage to property. ►

Do not cut into or through the hinge.

► Cut through the stabilizing strap or holding

strap last.

► If the tree begins to fall too soon: Abandon

the felling cut and retreat along the escape.

■ Kickback can occur if the rotating chain in the upper quadrant of the bar nose makes contact with a hard felling wedge and is suddenly braked. This can result in serious or fatal inju‐ ries. ►

Use aluminum or plastic felling wedges.

■ If the tree does not fall all the way to the ground or gets caught on another tree, the operator cannot finish the operation in a con‐ trolled manner. ►

Stop the felling operation and use a cable winch or suitable vehicle to pull the tree to the ground.

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4 Safety Precautions English

4.9 Reactive Forces

4.9.1 Kickback

Kickback can be caused for the following rea‐ sons:

The rotating saw chain in the upper quadrant

–

of the bar nose makes contact with a hard object and is suddenly braked. The rotating saw chain is pinched at the bar

–

nose.

The chain brake cannot prevent kickback.

WARNING

4.9.2 Pull-in

The saw is pulled away from the operator when the bottom of the bar is used for cutting.

WARNING

■ If the rotating chain makes contact with a hard object and is suddenly pinched, the saw is abruptly jerked away from the operator. The operator can lose control of the saw and be seriously or fatally injured. ►

Hold the saw firmly with both hands.

► Operate the saw as described in this

instruction manual. ► Keep the guide bar straight in the cut. ► Apply the spiked bumper properly. ► Always cut with the chain running at full

speed.

4.9.3 Pushback

If kickback occurs, the saw can be thrown up

■ in the direction of the operator. The operator

can lose control of the saw and be seriously or fatally injured. ►

Hold the saw firmly with both hands.

► Always keep your body out of the plane of

the cutting attachment.

► Use the working techniques described in

this instruction manual.

► Do not cut with the upper quadrant of the

bar nose.

► Always cut with a properly sharpened and

tensioned saw chain. ► Use a reduced kickback saw chain. ► Use a guide bar with a narrow radius nose. ► Always cut with the chain running at full

speed.

0458-528-0121-B 9

The saw is pushed back toward the operator when the top of the bar is used for cutting.

WARNING

■

If the rotating chain makes contact with a hard object and is suddenly pinched, the saw can be abruptly pushed back toward the operator. The operator can lose control of the saw and be seriously or fatally injured. ►

Hold the saw firmly with both hands.

► Operate the saw as described in this

instruction manual. ► Keep the guide bar straight in the cut. ► Always cut with the chain running at full

speed.

0000099162_002

English 5 Preparing the Saw for Operation

4.10 Transport

WARNING

■

The saw may turn over or shift during trans‐ port. This may result in serious injury to people and damage to property. ►

Shut off the engine. ► Engage the chain brake. ► Fit the chain scabbard so that it completely

covers the guide bar. ► Secure the chainsaw with lashing straps,

belts or a net to prevent it turning over and

moving.

The muffler and engine may be hot after a

■ period of operation. There is a risk of burn

injuries. ►

Carry the chainsaw by holding the front handle in your left hand with the guide bar pointing to the rear.

4.11 Storing

WARNING

■

Children are not aware of and cannot assess the dangers of a chainsaw and can be seri‐ ously injured. ►

Shut off the engine. ► Engage the chain brake. ► Fit the scabbard so that it completely cov‐

ers the guide bar. ► Store the saw out of the reach of children.

■ Dampness can corrode the electrical contacts on the saw and metal components. This can damage the saw. ►

Store the saw in a clean and dry condition.

4.12 Cleaning, Maintenance and

Repair

WARNING

■

The saw chain can start up unintentionally if the engine is running during cleaning, mainte‐ nance or repair operations. This may result in serious injury to people and damage to prop‐ erty. ►

Shut off the engine.

► Engage the chain brake.

■ The muffler and engine may be hot after a period of operation. This can result in burn injuries. ►

Wait until the muffler and engine cool down.

■ Aggressive cleaning agents, a water jet or pointed objects can damage the chainsaw, guide bar and saw chain. If the chainsaw, guide bar or saw chain are not cleaned cor‐ rectly, components may no longer function properly or safety devices may be rendered inoperative. They may cause serious injury to persons. ► Clean the chainsaw, guide bar and saw

chain as described in this user manual.

■ If the chainsaw is not maintained as described in this user manual, components may no lon‐ ger function properly or safety devices may be rendered inoperative. This may result in serous or fatal injury to people. ►

Service or repair the chainsaw as described in this user manual.

■ If the guide bar and saw chain are not main‐ tained or repaired as described in this user manual, components may no longer function properly or safety devices may be rendered inoperative. They may cause serious injury to persons. ►

Service or repair the guide bar and saw chain as described in this User Manual.

■ The user may be cut by the sharp cutters while cleaning or servicing the saw chain. This may result in injury to the user. ►

Wear work gloves made from resistant material.

5 Preparing the Saw for

Operation

5.1 Preparing the Saw for Opera‐

tion

Perform the following steps before starting work: ► Make sure the following components are in a

safe condition:

–

Chainsaw, 4.6.1.

–

Guide bar, 4.6.2.

–

Saw chain, 4.6.3.

►

Clean the saw,

►

Mount the bar and chain, 6.1.1.

►

Tension the saw chain, 6.2.

►

Fill up with chain oil, 6.3.

►

Check the chain brake, 10.4.

►

Refuel the saw, 8.2.

►

Check the controls, 10.5.

15.1.

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6 Assembling the Saw English

►

Check chain lubrication, 10.6.

► If you cannot carry out these steps: Do not use

your chainsaw and contact your STIHL servic‐ ing dealer for assistance.

6 Assembling the Saw

6.1 Mounting and Removing the Bar and Chain

6.1.1 Mounting the bar and chain

The bar and chain combinations that can be used with the chain sprocket are listed in the specifications, 20.1. ► Shut off the engine and engage the chain

brake.

► Fit the chain on the chain sprocket (7) so that

the chain’s drive links mesh with the sprock‐ et’s teeth.

► Fit the chain in the bar groove so that the

arrows on the tie straps on the top of the bar point in the direction of rotation.

► Rotate the nut (1) counterclockwise until the

chain sprocket cover (2) can be removed. ► Remove the chain sprocket cover (2). ► Turn the tensioning screw (3) counterclock‐

wise until the tensioner slide (4) butts against

the left end of the housing.

► Fit the guide bar and chain on the saw and

check the following points:

Collar stud (5) is located in slot in tail of

–

guide bar (6). Peg of tensioner slide (4) engages hole (8)

–

in guide bar (6).

The guide bar (6) may be either way round. The logo on the guide bar (6) may also be upside down.

► Turn the tensioning screw (3) clockwise until

the chain fits snugly against the bar. Make sure the drive link tangs engage the bar groove. The guide bar (6) and chain are seated against the saw.

► Fit the sprocket cover (2) so that it is flush with

the saw.

► Fit and tighten down the nut (1).

6.1.2 Removing the bar and chain ► Shut off the engine and engage the chain

brake.

► Rotate the nut counterclockwise until the chain

sprocket cover can be removed. ► Remove the sprocket cover. ► Turn the tensioning screw counterclockwise as

far as stop.

The chain is now slack. ► Remove the bar and chain.

6.2 Tensioning the Saw Chain

The saw chain expands or contracts during cut‐ ting work. Chain tension changes as a result. Check chain tension regularly during operation and readjust if necessary. ► Shut off the engine and engage the chain

brake.

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English 7 Engaging and Disengaging the Chain Brake

► If the grip on the oil tank cap has dropped into

the closed position: Raise the grip until it is

vertical.

► Loosen the nut (1). ► Disengage the chain brake. ► Hold the bar nose up and turn the tensioning

screw (2) clockwise until the following points apply:

Chain sag ‘a’ in the center of the bar is 1 - 2

–

mm. The chain can still be pulled easily along the

–

bar with two fingers.

► Keep holding the bar nose up and tighten

down the nut (1) firmly.

► If chain sag ‘a’ in the center of the bar is not 1

- 2 mm: Readjust chain tension.

6.3 Filling Up with Saw Chain Oil

The saw chain oil lubricates and cools the rotat‐ ing chain.

STIHL recommends you use a STIHL saw chain

► Place the oil tank cap in the filler opening so

that mark (1) lines up with mark (2). ► Press the oil tank cap down and rotate it clock‐

wise as far as it will go.

The oil tank cap snaps into place. The mark

(1) points to mark (3). ► Check to see if the oil tank cap can be pulled

upwards and off. ► If the oil tank cap cannot be pulled upwards

and off: Fold down the grip on the oil tank cap.

The oil tank is closed.

If the oil tank cap can be pulled upwards and off, perform the following steps: ► Place the oil tank cap in the filler opening – in

any position.

oil or an equivalent chain oil approved for chain‐ saws. ► Shut off the engine and engage the chain

brake.

► Place your chainsaw on a level surface so that

the oil tank cap faces up.

► Use a damp cloth to clean the oil tank cap and

the area around it.

► Press the oil tank cap down and rotate it clock‐

wise as far as it will go. ► Press the oil tank cap down and rotate it coun‐

terclockwise until mark (1) points to mark (2). ► Now try again to close the oil tank. ► If the oil tank still cannot be closed properly:

Do not use the chainsaw and contact a STIHL

dealer for assistance.

► Swing the grip on the oil tank cap to the verti‐

cal position.

► Turn the oil tank cap counterclockwise as far

as it will go. ► Remove the oil tank cap. ► Fill up with saw chain oil, taking care not to

spill any oil and not to overfill the tank.

12 0458-528-0121-B

The chainsaw is not in a safe condition.

7 Engaging and Disengaging

the Chain Brake

7.1 Engaging the Chain Brake

The saw is equipped with a chain brake.

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8 Mixing Fuel and Refueling the Chainsaw English

The chain brake is activated by the inertia of the front hand guard if the kickback force is high enough or can be engaged by the operator.

► Push the hand guard away from the handlebar

with your left hand.

The hand guard engages with an audible click.

The chain brake is engaged.

7.2 Disengaging the Chain Brake

► Make sure the two-stroke engine oil you are

using meets the requirements.

► Depending on the required amount of fuel,

determine the correct amounts of two-stroke engine oil and gasoline in a mix ratio of 50:1. Examples for fuel mixes:

1 liter gasoline, 20 ml two-stroke engine oil

–

3 liters gasoline, 60 ml two-stroke engine oil

–

5 liters gasoline, 100 ml two-stroke engine

–

oil

► Pour two-stroke engine oil into a clean

approved fuel canister first and then add gaso‐ line.

► Thoroughly mix the fuel.

8.2 Fueling the Saw

► Shut off the engine and engage the chain

brake. ► Allow chainsaw to cool down. ► Place your chainsaw on a level surface so that

the fuel tank cap faces up. ► Use a damp cloth to clean the tank cap and

the area around it. ► Swing the grip on the fuel tank cap to the verti‐

cal position.

► Pull the hand guard back towards the handle

with your left hand. The hand guard engages with an audible click. The chain brake is disengaged.

8 Mixing Fuel and Refueling

the Chainsaw

8.1 Mixing Fuel

This chainsaw requires a fuel mixture of gasoline and two-stroke engine oil in a ratio of 50:1.

STIHL recommends you use STIHL MotoMix.

If you mix the fuel yourself, use only STIHL twostroke engine oil or another high-performance engine oil in accordance with JASO FB, JASO FC, JASO FD, ISO-L-EGB, ISO-L-EGC or ISO-LEGD.

STIHL specifies STIHL HP Ultra two-stroke engine oil or an equivalent high-performance engine oil in order to maintain emission limits throughout the machine’s service life. ► Make sure that the octane number of the gas‐

oline is at least 90 RON and the ethanol con‐ tent is not more than 10%.

0458-528-0121-B 13

WARNING

■ The chainsaw becomes hot during operation,

or in a very hot environment. Depending on

the type of fuel, altitude, ambient temperature

and the temperature of the saw, the fuel

expands and can cause a pressure build-up in

the tank. Fuel may escape as a spray and

ignite when the fuel tank cap is opened. This

can result in serious injuries and damage to

property.

► Allow the saw to cool down before opening

the tank cap.

► Open the tank cap slowly in stages.

► Turn the fuel tank cap about 1/8 of a turn

counterclockwise.

If the fuel tank is under pressure, you will hear

pressure being released.

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English 9 Starting and Stopping the Engine

► When the tank is no longer under pressure:

Turn the tank cap counterclockwise until the marks on the cap and fuel tank are in align‐ ment.

► Remove the fuel tank cap.

NOTICE

■ Bright light, sunlight and extreme tempera‐ tures can cause the fuel mix to separate much faster. The saw can be damaged if it is used with a fuel mix that has become separated. ►

Thoroughly mix the fuel.

► Do not use fuel mix that has been stored for

more than 30 days.

► Fill the tank to within no more than 15 mm

of the brim, taking care not to spill any fuel.

► If the grip on the fuel tank cap has dropped

into the closed position: Raise the grip until it is vertical.

► Press the cap down and rotate it clockwise as

far as stop.

► Press the cap down and rotate it counterclock‐

wise until mark (1) points to mark (2). ► Now try again to close the fuel tank. ► If the fuel tank still cannot be closed properly:

Do not use the chainsaw and contact a STIHL

dealer for assistance.

The chainsaw is not in a safe condition.

9 Starting and Stopping the

Engine

9.1 Selecting the correct starting

procedure

When must the engine be prepared for starting?

The engine must be prepared for starting if one of the following conditions apply:

The engine is at ambient temperature.

► Place the cap in the filler opening so that mark

(1) lines up with mark (2).

► Press the cap down and rotate it clockwise as

far as stop. The cap snaps into place. The mark (1) is in line with mark (4) and points to mark (3).

► Check to see if the fuel tank cap can be pulled

upwards and off.

► If the fuel tank cap cannot be pulled upwards

and off: Fold the grip flush with the top of the cap. The fuel tank is closed.

If the fuel tank cap can be pulled upwards and off, perform the following steps: ► Place the fuel tank cap in the filler opening – in

any position.

–

The engine stopped when accelerated for the

–

first time.

The engine stopped because the fuel tank was

–

empty. ►

Prepare engine for start,

the engine, 9.3.

When can the engine be started without prepara‐ tion?

The engine can be started without preparation if it has been running for at least 1 minute and only shut down for a short work break. ►

Starting the engine,

9.2 and then start

9.3.

9.2 Preparing Engine for Start

► Select the correct starting procedure.

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9 Starting and Stopping the Engine English

► Engage the chain brake (2). ► Pull off the chain guard (scabbard).

9.3 Starting the Engine

► Select the correct starting procedure.

► Press the manual fuel pump bulb (1) at least

ten times.

► Press down the throttle trigger lockout (5) and

hold it there. ► Pull the throttle trigger (4) and hold it there. ► Move the Master Control lever (3) to posi‐

tion ► Release the throttle trigger (4) and lockout

lever (5). ►

Move the choke lever (6) to position

► Engage the chain brake (2). ► Pull off the chain guard (scabbard). ►

Move the choke lever (6) to position

► Press down the throttle trigger lockout (5) and

hold it there. ► Pull the throttle trigger (4) and hold it there. ► Move the Master Control lever (3) to posi‐

tion

► Hold the chainsaw firmly in one of three ways:

Place the saw on level ground. Hold the

–

saw firmly on the ground with your left hand on the handlebar – your thumb should be under the handle. Put the toe of your right boot into the rear handle and press down. Place the saw on level ground. Hold the

–

saw firmly on the ground with your left hand on the handlebar – your thumb should be under the handle. Put the heel of your right boot into the rear handle and press down. Hold the saw firmly with your left hand on

–

the handlebar – your thumb should be under the handle. Hold the rear handle tightly between your legs, just above the knees.

► Hold the chainsaw firmly in one of three ways:

Place the saw on level ground. Hold the

–

the handlebar – your thumb should be under the handle. Hold the rear handle tightly between your legs, just above the knees.

► Pull the starter grip slowly with your right hand

until you feel it engage.

► Pull the starter grip quickly and allow the

starter rope to rewind several times until the engine fires and stops.

►

Move the choke lever (6) to position .

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English 10 Checking the Saw

► Pull the starter grip slowly with your right hand

until you feel it engage.

► Pull the starter grip quickly and allow the

starter rope to rewind several times until the engine runs.

► Press down the throttle trigger lockout (5) and

hold it there.

► Blip the throttle trigger (4).

The Master Control lever (3) springs to posi‐ tion . The engine runs at idling speed.

NOTICE

■ Do not accelerate the engine with the chain brake engaged since this can damage the chain brake. ►

Disengage the chain brake before you start cutting.

► Disengage the chain brake.

► If there are visible wear marks: Do not use the

chainsaw and contact your STIHL servicing dealer for assistance. The chain sprocket must be replaced.

10.2 Checking the Guide Bar

► Shut off the engine and engage the chain

brake.

► Remove the chain and guide bar.

Your saw is ready for operation.

► If the saw chain rotates while the engine is

idling: See troubleshooting. Idle speed adjustment is not correct.

► If the engine does not start: Prepare the

engine for the start and then try again to start the engine.

9.4 Stopping the Engine

► Measure depth of bar groove with scale on

STIHL filing gauge.

► Install a new guide bar if one of the following

points applies:

Guide bar is damaged.

–

Measured bar groove depth is less than

–

specified minimum depth, 19.3. Bar groove is pinched or splayed.

–

► If you have any queries: Contact your STIHL

► Release the throttle trigger (3) and lockout

lever (2). The saw chain stops running.

► Move the Master Control lever (1) to posi‐

tion . The engine stops and the Master Control lever

(1) springs back to position

servicing dealer for assistance.

10.3 Checking the Saw Chain

► Shut off the engine and engage the chain

brake.

10 Checking the Saw

10.1 Checking the Chain Sprocket

► Shut off the engine. ► Disengage the chain brake. ► Remove the chain sprocket cover. ► Remove the bar and chain.

16 0458-528-0121-B

► Use a STIHL filing gauge (2) to check the

height of the depth gauges (1). The STIHL fil‐ ing gauge must match the chain pitch.

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11 Operating the Saw English

► If a depth gauge (1) projects from the filing

gauge (2): Lower the depth gauge (1), 16.3.

► Make sure the service marks (1 to 4) on the

cutters are visible.

► If one of the service marks is not visible on a

cutter: Do not use your chainsaw and contact your STIHL servicing dealer for assistance.

► Use a STIHL filing gauge to check that a filing

angle of 30° has been maintained on all cut‐ ters. The STIHL filing gauge must match the chain pitch.

► If a filing angle of 30° has not been main‐

tained: Resharpen the saw chain.

► If you have any queries: Contact your STIHL

servicing dealer for assistance.

10.4 Testing the Chain Brake

► Shut off the engine and engage the chain

brake.

WARNING

■ The chain's cutters are very sharp. There is a risk of cut injuries. ► Wear work gloves made of durable mate‐

rial.

► Try to pull the chain along the guide bar by

hand. If the chain cannot be pulled along the bar by hand, the chain brake is functioning.

► If the chain can be pulled along the bar by

hand: Do not use your chainsaw and contact your STIHL servicing dealer for assistance. The chain brake is defective.

► Press down the throttle trigger lockout and

hold it there. ► Pull the throttle trigger and release it again. ► If the throttle trigger is stiff or does not spring

back to its idle position: Do not use the chain‐

saw and contact your STIHL servicing dealer

for assistance.

The throttle trigger is defective.

Stopping the engine ► Start the engine. ► Move the Master Control lever (1) to posi‐

tion

The engine stops and the Master Control lever

springs back to position . ► If the engine does not stop:

►

Move the choke lever to position The engine stops.

► Do not use the chainsaw and contact your

STIHL servicing dealer for assistance. The Master Control lever is defective.

10.6 Checking Chain Lubrication

► Start the engine and disengage the chain

brake. ► Hold the guide bar over a light surface. ► Open the throttle.

Chain oil is thrown off the chain and is visible

on the light surface. Chain lubrication is oper‐

ating properly.

11 Operating the Saw

11.1 Adjusting Carburetor for Opera‐

tion at High Altitude

If you use the chainsaw at high altitude, the engine will not deliver optimum power. The car‐ buretor setting can be adjusted to obtain opti‐ mum engine power. ► Start the engine and disengage the chain

brake. ► Warm up the engine by opening and closing

the throttle for about 1 minute.

10.5 Checking the Controls

Throttle trigger lockout and throttle trigger ► Shut off the engine and engage the chain

brake.

► Attempt to pull the trigger without depressing

the lockout lever.

► If the trigger can be pulled: Do not use the

chainsaw and contact your STIHL servicing dealer for assistance. The throttle trigger lockout is defective.

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English 11 Operating the Saw

NOTICE

■ If the chainsaw is again used at a low altitude, the engine may overheat. ► Carry out the standard setting.

► Rotate the high speed screw H clockwise

until the engine delivers optimum power.

11.2 Adjusting Carburetor for Cut‐

ting at Temperatures Below – 10°C

The engine will not accelerate properly if the chainsaw is used at temperatures below –10°C. The carburetor can be adjusted to obtain normal engine acceleration in such conditions. ► Start the engine and disengage the chain

brake.

► Warm up the engine by opening and closing

the throttle for about 1 minute.

NOTICE

■ Engine power may drop noticeably when the chainsaw is subsequently used at tempera‐ tures above –10°C. ►

Carry out the standard setting.

► Rotate the low speed screw (L) a quarter

turn counterclockwise.

► If the saw chain runs continuously or the

engine stops: Adjust idle speed.

11.3 Holding and Controlling the

Chainsaw

► Hold and control your chainsaw with your left

hand on the handlebar and your right hand on the control handle. Wrap thumb of left hand around the handlebar and thumb of right hand around the control handle.

11.4 Sawing

WARNING

■ If kickback occurs, the chainsaw can be thrown up in the direction of the operator. This may result in serious or fatal injury to the user. ►

Always cut with the chain running at full speed.

► Do not cut with the upper quadrant of the

guide bar nose.

► Begin the cut with the chain running at full

speed and keep the guide bar vertical.

► Engage the spiked bumper and use it as a ful‐

crum.

► Guide the full width of the guide bar into the

wood and reposition the spiked bumper as required.

► Take the weight of the chainsaw at the end of

the cut.

11.5 Limbing

► Support the chainsaw on the log. ► With the chain running a full speed, pivot the

guide bar downward against the limb.

► Cut through the limb with the top of the guide

bar.

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11 Operating the Saw English

11.6.3 Basic information on felling cut

► If the limb is under tension: Make the relieving

cut (1) at the compression side and then per‐ form the bucking cut (2) from the tension side.

11.6 Felling

11.6.1 Determining direction of fall and escape path

► Determine direction of fall so that the area in

which the tree falls is clear.

C Felling notch

The felling notch determines the direction of fall.

D Hinge

The hinge helps control the falling tree. The width of the hinge is 1/10 of the trunk diame‐ ter.

E Felling cut

The tree is felled with the felling cut. The fell‐ ing cut is 1/10 of the trunk diameter (at least 3 cm) above the bottom of the felling notch.

F Stabilizing strap

The stabilizing strap supports the tree and helps prevent it from falling prematurely. The width of the stabilizing strap is 1/10 to 1/5 of the trunk diameter.

► Observe the following points when planning

escape path (B):

Escape path (B) at an angle of 45° to direc‐

–

tion of fall (A). No obstacles on the escape path (B).

–

The top of the tree can be observed.

–

If the escape path (B) is on a slope, it must

–

be parallel to the slope.

11.6.2 Preparing work area at base of tree

G Holding strap

The holding strap supports the tree and helps prevent it from falling prematurely. The width of the holding strap is 1/10 to 1/5 of the trunk diameter.

11.6.4 Cutting the felling notch

The felling notch determines the direction in which the tree falls. Country-specific standards for making the felling notch must be observed.

► Remove obstacles from work area at tree

base.

► Remove growth from tree base.

► Position the saw so that the felling notch is an

right angles to the direction of fall and the saw is close to the ground.

► If the tree has large, healthy buttress roots:

Make vertical cut first and then a horizontal cut, and remove the resulting piece.

0458-528-0121-B 19

► Make the horizontal cut. ► Make the angle cut at 45° to the horizontal cut.

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English 11 Operating the Saw

► If the wood is sound and long-fibered:

Observe the following points when making sapwood cuts:

The cuts must be the same at both sides.

–

The cuts must be at same height as bottom

–

of felling notch. The width of the cuts is 1/10 of the trunk

–

diameter.

The trunk does not splinter when the tree falls.

11.6.5 Plunge cutting

Plunge cutting is a technique required for felling.

1 Normal tree

A normal tree is vertical and has an even crown.

2 Leaner

A leaner stands at an angle and the crown faces in the direction of fall.

11.6.7 Felling normal, small diameter tree

A normal tree is felled with a felling cut and stabi‐ lizing strap. This felling cut must be performed if the tree diameter is less than the guide bar’s length. ► Shout a warning.

► Begin cut with the lower portion of the guide

bar nose – with chain running at full speed.

► Cut until depth of kerf is twice the width of the

guide bar. ► Swing the saw into plunge-cutting position. ► Perform the plunge cut

11.6.6 Selecting the Appropriate Felling Cut The choice of appropriate felling cut depends on the following conditions:

The natural inclination of the tree

–

The tree’s branch formation

–

Damage to the tree

–

The tree’s state of health

–

If there is snow on the tree: the snow load

–

The direction of slope

–

Wind direction and speed

–

Nearby trees, if any

–

► Plunge the guide bar into the felling cut until it

is visible at the other side of the trunk,

11.6.5.

► Apply the spiked bumper behind the hinge and

use it as a pivot. ► Enlarge felling cut in direction of hinge. ► Enlarge felling cut in direction of stabilizing

strap.

There are different features of these conditions. Only two features are described in this Instruc‐ tion Manual.

► Insert a felling wedge. The felling wedge must

match the tree diameter and the width of the

felling cut.

20 0458-528-0121-B

► Shout a warning.

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11 Operating the Saw English

► With outstretched arms, cut through the stabi‐

lizing strap horizontally from outside at the same level as the felling cut. The tree falls.

11.6.8 Felling normal, large diameter tree

11.6.9 Felling a small diameter leaner

A leaner is felled with a felling cut and holding strap. This felling cut must be performed if the tree diameter is less than the guide bar’s length. ► Shout a warning.

A normal tree is felled with a felling cut and stabi‐ lizing strap. This felling cut must be performed if the tree diameter is greater than the guide bar’s length. ► Shout a warning.

► Plunge the guide bar into the felling cut until it

is visible at the other side of the trunk,

11.6.5. ► Enlarge felling cut in direction of hinge. ► Enlarge felling cut in direction of holding strap.

► Apply the spiked bumper at the same height

as the felling cut and use it as a pivot.

► Hold the saw horizontally and swing it into the

felling cut as far as possible. ► Enlarge felling cut in direction of hinge. ► Enlarge felling cut in direction of stabilizing

strap. ► Move to the other side of the tree. ► Plunge the guide bar into the felling cut at the

same height. ► Enlarge felling cut in direction of hinge. ► Enlarge felling cut in direction of stabilizing

strap.

► Shout a warning. ► With arms outstretched, cut through the hold‐

ing strap from outside at a downward angle. The tree falls.

11.6.10 Felling a large diameter leaner

A leaner is felled with a felling cut and holding strap. This felling cut must be performed if the tree diameter is greater than the guide bar’s length. ► Shout a warning.

► Insert a felling wedge. The felling wedge must

match the tree diameter and the width of the

felling cut. ► Shout a warning. ► With outstretched arms, cut through the stabi‐

lizing strap horizontally from outside at the

same level as the felling cut.

The tree falls.

► Apply the spiked bumper behind the holding

strap at the same height as the felling cut and use it as a pivot.

► Hold the saw horizontally and swing it into the

felling cut as far as possible.

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English 12 After Finishing Work

► Enlarge felling cut in direction of hinge. ► Enlarge felling cut in direction of holding strap. ► Move to the other side of the tree. ► Apply the spiked bumper behind the hinge at

the same height as the felling cut and use it as

a pivot. ► Hold the saw horizontally and swing it into the

felling cut as far as possible. ► Enlarge felling cut in direction of hinge. ► Enlarge felling cut in direction of holding strap.

Carrying the chainsaw in a vehicle ► Secure the saw to prevent turnover and move‐

ment.

14 Storing

14.1 Storing the Chainsaw

► Shut off the engine and engage the chain

brake.

► Fit the scabbard so that it completely covers

the guide bar.

► Observe the following points when storing the

saw:

Saw is out of the reach of children.

–

The saw is clean and dry.

–

15 Cleaning

15.1 Cleaning the Saw

► Shut off the engine and engage the chain

► Shout a warning. ► With arms outstretched, cut through the hold‐

ing strap from outside at a downward angle.

The tree falls.

brake. ► Allow chainsaw to cool down. ► Clean the saw with a damp cloth or STIHL

resin solvent. ► Clean cooling air slots with a soft brush.

12 After Finishing Work

12.1 After Finishing Work

► Shut off the engine and engage the chain

brake. ► Allow chainsaw to cool down. ► If the saw is wet: Allow the saw to dry. ► Clean the saw. ► Clean the air filter. ► Clean the bar and chain. ► Loosen nut on the chain sprocket cover. ► Turn the tensioning screw two full turns coun‐

terclockwise.

The chain is now slack. ► Tighten down the nut on the chain sprocket

cover. ► Fit the scabbard so that it completely covers

the guide bar.

13 Transporting

13.1 Transporting the Chainsaw

► Shut off the engine and engage the chain

brake. ► Fit the chain scabbard so that it completely

covers the guide bar.

Carrying the chainsaw ► Carry the chainsaw by holding the front handle

in your left hand with the guide bar pointing to

the rear.

22 0458-528-0121-B

► Rotate the shroud lock (1) a half turn counter‐

clockwise. ► Remove the shroud (2). ► Remove the chain sprocket cover. ► Use a soft brush, damp cloth or STIHL resin

solvent to clean the inside of the shroud. ► Clean the area around the sprocket with a

damp cloth or STIHL resin solvent. ► Place the shroud (2) in position. ► Rotate the shroud lock (1) clockwise until you

hear a click.

The shroud lock (1) is secure. ► Fit the chain sprocket cover.

15.2 Cleaning the Bar and Chain

► Shut off the engine and engage the chain

brake. ► Remove the bar and chain.

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15 Cleaning English

► Clean the oil inlet hole (1), oil port (2) and bar

groove (3) with a soft brush or STIHL resin solvent.

► Clean the saw chain with a soft brush or

STIHL resin solvent.

► Mount the bar and chain.

15.3 Cleaning the Spark Plug

► Shut off the engine and engage the chain

brake.

► Allow the chainsaw to cool down.

► Pull off the spark plug boot (1). ► If the area around the spark plug is soiled:

Clean it with a cloth. ► Unscrew the spark plug. ► Clean the spark plug with a cloth. ► If the spark plug is corroded: Replace the

spark plug.

► Rotate the shroud lock (1) a half turn counter‐

clockwise. ► Remove the shroud (2). ► Remove the air filter (3). ► Knock out the filter (3). ► Clean the filter (3) with a soft brush. ► If the filter (3) is damaged. Install a new filter

(3). ► Blow out the filter with compressed air from

the clean air side.

WARNING

■ Cleaning agent may cause irritation if it con‐

tacts the skin or eyes.

► Observe the information supplied with the

cleaning agent. ► Avoid contact with cleaning agents. ► In case of contact with the skin: Wash

affected areas with plenty of water and

soap. ►

In case of contact with the eyes: Rinse eyes

with plenty of water for at least 15 minutes

and seek medical advice.

►

If the air filter is very dirty:

► Install the filter (3). ► Place the shroud (2) in position.

► Rotate the shroud lock (1) clockwise until you ► Insert and tighten down the spark plug. ► Press the spark plug boot (1) firmly home.

15.4 Cleaning the Air Filter

15.4.1 Cleaning the fabric air filter ► Shut off the engine and engage the chain

brake.

0458-528-0121-B 23

hear a click. The shroud lock (1) is secure.

15.4.2 Cleaning the Fleece Air Filter

► Shut off the engine and engage the chain

brake.

0000-GXX-7562-A0

0000-GXX-7563-A0

0000-GXX-1219-A0

English 16 Maintenance

Monthly

► Have the oil tank cleaned by a STIHL dealer.

► Have the fuel tank cleaned by a STIHL dealer.

► Have the pickup body in the fuel tank cleaned

by a STIHL dealer.

Annually

► Have the pickup body in the fuel tank replaced

by a STIHL dealer.

► Rotate the shroud lock (1) a half turn counter‐

clockwise. ► Remove the shroud (2). ► Remove the air filter (3). ► Knock out the filter (3). ► If the filter (3) is damaged. Install a new filter

(3). ► Blow out the filter with compressed air from

the clean air side.

16.2 Deburring the Guide Bar

A burr can build up on the outer edge of the guide bar. ► Remove burr with a flat file or a STIHL guide

bar dressing tool.

► If you have any queries: Contact your STIHL

servicing dealer.

16.3 Sharpening the Saw Chain

Correctly sharpening saw chains requires a lot of practice.

STIHL files, STIHL filing aids, STIHL sharpeners and the brochure “Sharpening STIHL Saw Chains” help you achieve the right results. To obtain the brochure visit http://www.stihl.com/ sharpening-brochure.

STIHL recommends you have saw chains

► Install the filter (3). ► Place the shroud (2) in position. ► Rotate the shroud lock (1) clockwise until you

hear a click.

The shroud lock (1) is secure.

resharpened by a STIHL servicing dealer.

WARNING

■ The chain's cutters are very sharp. There is a risk of cut injuries. ► Wear work gloves made of durable mate‐

16 Maintenance

rial.

16.1 Maintenance intervals

Maintenance intervals depend on the ambient conditions and the operating conditions. STIHL recommends the following maintenance inter‐ vals:

Chain brake ► Have a STIHL dealer service the chain broke

in the following intervals:

Full-time use: every three months

–

Part-time use: every six months

–

Occasional use: every year

–

After every 100 hours of operation ► Replace the spark plug.

Weekly ► Check the chain sprocket. ► Check and deburr the guide bar. ► Check and resharpen the saw chain.

► File each cutter with a round file so that the

following points are observed:

Round file matches the chain pitch.

–

File from the inside to the outside of the cut‐

–

ter. Hold the file at right angle to the guide bar.

–

Maintain a filing angle of 30°.

–

24 0458-528-0121-B

0000-GXX-1220-A1

17 Repairing English

and parallel to the service mark. The STIHL fil‐ ing gauge must match the chain pitch.

► If you have any queries: Contact your STIHL

servicing dealer for assistance.

17 Repairing

17.1 Repairing the Chain Saw,

Guide Bar and Saw Chain

► File down the depth gauges with a flat file so

that they are level with the STIHL filing gauge

The chain saw, guide bar and saw chain cannot be repaired by the user. ► If the saw, guide bar or saw chain is damaged:

Do not use your saw, guide bar or saw chain, and contact your STIHL servicing dealer.

18 Troubleshooting

18.1 Troubleshooting Chainsaw

Most malfunctions have the same causes. ► Perform the following operations:

► Clean the air filter. ► Clean or replace the spark plug. ► Carry out the standard setting. ► Adjust idle speed. ► Adjust carburetor for operation at high altitude. ► Adjust carburetor for cutting at temperatures below –10°C.

► If the malfunction still exists: Take the action described in the following table.

Condition Cause Remedy Engine does not

start.

Engine idles errati‐ cally.

Engine stops while idling

Poor acceleration The chain is over-ten‐

Saw chain does not rotate when throttle is opened.

Smoke or burning smell while cutting.

Insufficient fuel in the tank.

Engine is flooded. ► Clear the combustion chamber. Carburetor is too hot. ► Allow chainsaw to cool down.

Carburetor is iced up. ► Allow saw to warm up to +10°C. Carburetor is iced up. ► Allow saw to warm up to +10°C.

Carburetor is iced up. ► Allow saw to warm up to +10°C.

sioned. Chain lubrication sys‐

tem is supplying insufficient chain oil.

The chain brake is engaged.

The chain is over-ten‐ sioned.

Bar nose sprocket is blocked.

Chain is not properly sharpened.

Insufficient chain oil in the tank.

► Mix fuel and refuel the chainsaw.

► If manual fuel pump is fitted: Depress the manual fuel

pump at least 10 times before starting the engine.

► Tension the chain properly.

► Do not use the chainsaw and contact your STIHL

servicing dealer for assistance.

► Disengage the chain brake.

► Tension the chain properly.

► Clean the bar nose sprocket with STIHL resin solvent.

► Sharpen the chain properly.

► Fill up with chain oil.

0458-528-0121-B 25

0000-GXX-2946-A0

0000-GXX-2938-A0

0000-GXX-7566-A0

English 18 Troubleshooting

Condition Cause Remedy

Chain lubrication sys‐ tem is supplying

► Do not use the chainsaw and contact your STIHL

servicing dealer for assistance.

insufficient chain oil. The chain is over-ten‐

► Tension the chain properly.

sioned. Chainsaw is not

► Have correct use explained, then practice.

being used properly.

18.2 Standard Setting

► Shut off the engine and engage the chain

brake.

Saw chain runs continuously while engine is idling ► Carry out the standard setting. ► Start the engine and disengage the chain

brake.

► Warm up the engine by opening and closing

the throttle for about 1 minute.

► Turn the idle speed screw (LA) counterclock‐

wise until the saw chain stops running.

► Turn the idle speed screw (LA) one full turn

counterclockwise.

► Turn the high speed screw (H) counterclock‐

wise as far as stop.

► Turn the low speed screw (L) clockwise as far

18.4 Clearing the Combustion

Chamber

► Engage the chain brake.

as stop.

► Rotate the low speed screw (L) a quarter turn

counterclockwise.

18.3 Adjusting Idle Speed

► Pull off the spark plug boot (1). ► Unscrew the spark plug. ► Dry the spark plug.

WARNING

Engine stops while idling ► Carry out the standard setting. ► Start the engine and disengage the chain

brake.

► Warm up the engine by opening and closing

the throttle for about 1 minute.

► If the engine continues to stop while idling:

Turn the idle speed screw (LA) half a turn clockwise and restart the engine.

► Turn the idle speed screw (LA) clockwise until

the chain begins to run.

► Turn the idle speed screw (LA) one full turn

counterclockwise.

■ Unconfined sparks may occur if the starter grip is pulled after the spark plug boot has been removed. Sparks may cause a fire or an explosion in an easily combustible or explo‐ sive environment. This can result in serious or fatal injuries and damage to property. ►

Move the Master Control lever to posi‐

and hold it there before pulling the

tion starter grip.

►

Move the Master Control lever to position and hold it there.

► Pull the starter grip and guide it back several

times. The combustion chamber is cleared.

► Insert and tighten down the spark plug.

26 0458-528-0121-B

0000-GXX-7567-A0

19 Specifications English

1/4" P: 4 mm

–

1/4" 4 mm

–

19.4 Sound Values and Vibration

Values

Sound pressure level LpA measured according

–

to ISO 22868: 101 dB(A). The K value for the sound pressure level is 2 dB(A). Sound power level LwA measured according to

–

► Press the spark plug boot (1) firmly home.

19 Specifications

19.1 STIHL MS 194 Chainsaw

Displacement: 31.8 cm³

–

Engine power to ISO 7293: 1.4 kW (1.9 bhp)

– –

Idle speed to ISO 11681: 3,000 ± 50 rpm Approved spark plug: NGK CMR6H from

–

STIHL Electrode gap: 0.5 mm

–

Dry weight without guide bar and chain 3.5 kg

–

Max. fuel tank capacity: 270 cc (0.27 l)

–

Max. oil tank capacity: 220 cc (0.22 l)

–

19.2 Chain Sprockets and Chain Speeds

The following chain sprockets may be used:

6-tooth for 3/8” P

Maximum chain speed according to

–

ISO 11681: 26.0 m/s Chain speed at maximum power:

–

18.6 m/s

8-Tooth for 1/4" P and 1/4"

Maximum chain speed according to

–

ISO 11681:

23.6 m/s Chain speed at maximum power:

–

16.9 m/s

19.3 Minimum Groove Depth of Guide Bars

The minimum groove depth depends on the pitch of the guide bar.

3/8" P: 5 mm

–

ISO 22868: 114 dB(A). K-value (uncertainty) for sound power level is 2 dB(A). Vibration level ahv measured according to

–

ISO 22867:

Handlebar: 3.6 m/s². The K value for the

–

vibration level is 2 m/s². Control handle: 3.6 m/s². The K value for

–

the vibration level is 2 m/s².

For information on compliance with Employers' Vibration Directive 2002/44/EC see www.stihl.com/vib.

19.5 REACH

REACH is an EC regulation and stands for the Registration, Evaluation, Authorisation and Restriction of Chemical substances.

For information on compliance with the REACH regulation see www.stihl.com/reach.

19.6 Exhaust Emissions

The CO2value measured in the EU type approval procedure is specified at www.stihl.com/co2.

The measured CO2value was determined on a representative engine in accordance with a

standardized test procedure under laboratory conditions and does not represent either an explicit or implied guarantee of the performance of a specific engine.

The applicable exhaust emission requirements are fulfilled by the intended usage and mainte‐ nance described in this instruction manual. The type approval expires if the engine is modified in any way.

20 Bar and Chain Combinations

20.1 STIHL MS 194 Chainsaw

Pitch Drive link

gauge/groove width

3/8" P 1.1 mm

0458-528-0121-B 27

Length Guide bar Nose

25 cm Rollomatic E light

30 cm

Rollomatic E

sprocket teeth

Number of drive links

Saw chain

61 PMM3 (Type

3610)

English 21 Spare Parts and Accessories

Pitch Drive link

gauge/groove width

1.3 mm

1/4" P 1.1 mm

1/4” 1.3 mm 30 cm Carving E – 64 13 RMS (3661)

The cutting length of a guide bar depends on the chainsaw and the saw chain being used. Actual cut‐ ting length may be less than the specified length

21 Spare Parts and Accesso‐

ries

21.1 Spare parts and accessories

These symbols indicate original STIHL spare parts and original STIHL acces‐ sories.

STIHL recommends the use of original STIHL spare parts and accessories.

Despite ongoing market observation, STIHL is unable to judge the reliability, safety and suitabil‐ ity of other manufacturers' spare parts and accessories; accordingly, STIHL cannot warrant for the use of those parts.

Original STIHL spare parts and original STIHL accessories are available from STIHL dealers.

22 Disposal

22.1 Disposing of Chainsaw

Information on disposal is available from STIHL servicing dealers. ► Dispose of the chainsaw, guide bar, saw

chain, fuel mix, gasoline, two-stroke engine oil, accessories and packaging in accordance with local regulations and environmental require‐ ments.

28 0458-528-0121-B

Length Guide bar Nose

Rollomatic E

Light

35 cm

40 cm Rollomatic E 55 30 cm 35 cm 50 40 cm 55 45 cm 61 30 cm 35 cm 50

40 cm 55

25 cm 30 cm 64 35 cm 72 30 cm Carving E – 64

Rollomatic E

Rollomatic E light

Rollomatic E

Rollomatic E light

Rollomatic E 8

sprocket teeth

Number of drive links

23 EC Declaration of Con‐

formity

23.1 STIHL MS 194 Chainsaw

ANDREAS STIHL AG & Co. KG Badstraße 115 D-71336 Waiblingen

Germany

declares under our sole responsibility that

Category: chainsaw

–

Manufacturer's brand: STIHL

–

Model: MS 194

–

serial number: 1137

–

Displacement: 31.8 cm³

–

conforms to the relevant provisions of Directives 2011/65/EU, 2006/42/EC, 2014/30/EU and 2000/14/EC and has been developed and manu‐ factured in compliance with the following stand‐ ards in the versions valid on the date of produc‐ tion: EN ISO 11681‑1, EN 55012 and EN 61000‑6‑1.

The EC type examination pursuant to Directive 2006/42/EC Art. 12.3(b) was carried out by DPLF, Deutsche Prüf- und Zertifizierungsstelle für Land- und Forsttechnik GbR (NB 0363), Spremberger Straße 1, 64823 Groß‑Umstadt, Germany

Saw chain

44 63 PM (3613)

63 PD3 (3612)

63 PM (3613)

63 PM3 (3636)

63 PS (3617)

63 PS3 (3616)

63 PM3 (3636)

63 PS (3617)

63 PS3 (3616)

71 PM3 (Type

3670)

23 EC Declaration of Conformity English

Certification number K-EG 2018/8638

–

The measured and guaranteed sound power lev‐ els were determined according to Directive 2000/14/EC, Annex V, using the ISO 9207 standard.

Measured sound power level: 114 dB(A)

–

Guaranteed sound power level: 116 dB(A)

–

The technical documents are stored at ANDREAS STIHL AG & Co. KG Produktzulas‐ sung.

The year of manufacture and serial number are applied to the chainsaw.

Done at Waiblingen, 03.02.2020

ANDREAS STIHL AG & Co. KG

Dr. Jürgen Hoffmann, Head of Product Data, Regulations and Licensing

0458-528-0121-B 29

English 23 EC Declaration of Conformity

30 0458-528-0121-B

23 EC Declaration of Conformity English

0458-528-0121-B 31

www.stihl.com

*04585280121B*

0458-528-0121-B

*04585280121B*

0458-528-0121-B

Stihl MS 194 C Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

STIHL MS 194 C

2 Guide to Using this Manual

2.1 Symbols used with warnings in the text

2.2 Symbols in Text

3 Overview

3.1 Chainsaw

1 Introduction

3.2 Symbols

English 4 Safety Precautions

4.1 Warning Signs

4.2 Intended Use

4.3 The Operator

4.4 Clothing and Equipment

4.5 Work Area and Surroundings

4.6 Safe Condition

4.7 Fuel Mixture and Refueling

4.8 Working

4.9 Reactive Forces

English 5 Preparing the Saw for Operation

4.10 Transport

4.11 Storing

6 Assembling the Saw English

6.1 Mounting and Removing the Bar and Chain

6.2 Tensioning the Saw Chain

English 7 Engaging and Disengaging the Chain Brake

6.3 Filling Up with Saw Chain Oil

7.1 Engaging the Chain Brake

8 Mixing Fuel and Refueling the Chainsaw English

7.2 Disengaging the Chain Brake

8.2 Fueling the Saw

8.1 Mixing Fuel

English 9 Starting and Stopping the Engine

9.2 Preparing Engine for Start

9.3 Starting the Engine

English 10 Checking the Saw

10.2 Checking the Guide Bar

9.4 Stopping the Engine

10.3 Checking the Saw Chain

10.1 Checking the Chain Sprocket

11 Operating the Saw English

10.4 Testing the Chain Brake

10.6 Checking Chain Lubrication

10.5 Checking the Controls

11.4 Sawing

11.5 Limbing

11.6 Felling

English 12 After Finishing Work

14 Storing

14.1 Storing the Chainsaw

15 Cleaning

15.1 Cleaning the Saw

12.1 After Finishing Work

13 Transporting

13.1 Transporting the Chainsaw

15.2 Cleaning the Bar and Chain

15.3 Cleaning the Spark Plug

15.4 Cleaning the Air Filter

English 16 Maintenance

16.2 Deburring the Guide Bar

16.3 Sharpening the Saw Chain

16.1 Maintenance intervals

17 Repairing English

18 Troubleshooting

18.1 Troubleshooting Chainsaw

18.2 Standard Setting

18.3 Adjusting Idle Speed

19 Specifications English

19.1 STIHL MS 194 Chainsaw

19.2 Chain Sprockets and Chain Speeds

19.3 Minimum Groove Depth of Guide Bars

19.5 REACH

19.6 Exhaust Emissions

20 Bar and Chain Combinations

20.1 STIHL MS 194 Chainsaw

English 21 Spare Parts and Accessories

21.1 Spare parts and accessories