Stihl MS 290, MS 310, MS 390 Instruction Manual

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Page 1

MS 290, 310, 390

Instruction Manual2 - 43

Page 2

English

Contents

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

2 Safety Precautions......................................3

3 Reactive Forces.......................................... 7

4 Working Techniques................................... 8

5 Cutting Attachment................................... 15

6 Mounting the Bar and Chain..................... 16

7 Tensioning the Chain................................ 16

8 Checking Chain Tension...........................17

9 Fuel........................................................... 17

10 Fueling...................................................... 18

11 Chain Lubricant.........................................22

12 Filling Chain Oil Tank................................22

13 Checking Chain Lubrication...................... 22

14 Chain Brake.............................................. 23

15 Winter Operation.......................................23

16 Information Before You Start.................... 25

17 Starting / Stopping the Engine.................. 25

18 Operating Instructions...............................28

19 Oil Quantity Control...................................29

20 Taking Care of the Guide Bar................... 29

21 Air Filter System........................................30

22 Cleaning the Air Filter............................... 30

23 Adjusting the Carburetor........................... 30

24 Spark Arresting Screen in Muffler............. 31

25 Spark Plug................................................ 32

26 Storing the Machine.................................. 33

27 Checking and Replacing the Chain

Sprocket....................................................33

28 Maintaining and Sharpening the Saw Chain

.................................................................. 34

29 Maintenance and Care..............................38

30 Minimize Wear and Avoid Damage...........40

31 Main Parts.................................................40

32 Specifications............................................41

33 Ordering Spare Parts................................ 42

34 Maintenance and Repairs......................... 42

35 Disposal.................................................... 42

36 EC Declaration of Conformity................... 43

Dear Customer,

Thank you for choosing a quality engineered STIHL product.

It has been built using modern production techni‐ ques and comprehensive quality assurance. Every effort has been made to ensure your satis‐ faction and trouble-free use of the product.

Please contact your dealer or our sales company if you have any queries concerning this product.

Your

Dr. Nikolas Stihl

1 Guide to Using this Manual

This Instruction Manual refers to a STIHL chain saw, also called a machine in this Instruction Manual.

1.1 Pictograms

Pictograms that appear on the machine are explained in this Instruction Manual.

Depending on the machine and equipment ver‐ sion, the following pictograms may appear on the machine.

Fuel tank; fuel mixture of gasoline and engine oil

Tank for chain oil; chain oil

Engage and release chain brake

Coasting brake

Direction of chain travel

Ematic; chain oil flow adjustment

Tension saw chain

Intake air baffle: winter operation

Intake air baffle: summer operation

Handle heating

Actuate decompression valve

Original Instruction Manual

0000000394_026_GB

Printed on chlorine-free paper

Printing inks contain vegetable oils, paper can be recycled.

0458-209-0121-B. VA0.L21.

Actuate manual fuel pump

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Page 3

2 Safety Precautions English

1.2 Symbols in text

WARNING

Warning where there is a risk of an accident or personal injury or serious damage to property.

NOTICE

Caution where there is a risk of damaging the machine or its individual components.

1.3 Engineering improvements

STIHL's philosophy is to continually improve all of its products. For this reason we may modify the design, engineering and appearance of our products periodically.

Therefore, some changes, modifications and improvements may not be covered in this man‐ ual.

2 Safety Precautions

Special safety precautions must be observed to reduce the risk of per‐ sonal injury when working with a chain saw because of the very high chain speed and very sharp cutters.

It is important that you read the instruction manual before first use and keep it in a safe place for future reference. Non-observance of the instruction manual may result in seri‐ ous or even fatal injury.

2.1 General

Observe all applicable local safety regulations, standards and ordinances.

The use of noise emitting power tools may be restricted to certain times by national or local regulations.

If you have not used this model before: Have your dealer or other experienced user show you how to operate your machine or attend a special course in its operation.

Minors should never be allowed to use a chain saw.

Keep bystanders, especially children, and ani‐ mals away from the work area.

The user is responsible for avoiding injury to third parties or damage to their property.

Do not lend or rent your chain saw without the instruction manual. Be sure that anyone using it

understands the information contained in this manual.

To operate a chain saw you must be rested, in good physical condition and mental health. If you have any condition that might be aggravated by strenuous work, check with your doctor before operating a chain saw.

Do not operate the chain saw if you are under the influence of any substance (drugs, alcohol) which might impair vision, dexterity or judgment.

To reduce the risk of accidents or injury, put off the work in poor weather conditions (rain, snow, ice, wind).

Persons with pacemakers only: The ignition sys‐ tem of your chain saw produces an electromag‐ netic field of a very low intensity. This field may interfere with some pacemakers. To reduce health risks, STIHL recommends that persons with pacemakers consult their physician and the pacemaker manufacturer before operating this power tool.

2.2 Intended use

The machine may only be used to saw wood and wooden objects.

Do not use the machine for any other purpose – risk of accidents!

Do not modify the machine in any way – this may increase the risk of personal injury. STIHL excludes all liability for personal injury and dam‐ age to property caused while using unauthorised attachments.

2.3 Clothing and Equipment

Wear proper protective clothing and equipment.

Clothing must be sturdy and snug-fit‐ ting, but allow complete freedom of movement. Wear snug fitting clothing with cut-retardant pads – no loose-fit‐ ting jacket.

Avoid clothing that could get caught on branches, brush or moving parts of the machine. Do not wear a scarf, necktie or jewellery. Tie up and confine long hair (headscarf, cap, hard hat, etc.).

Wear suitable safety shoes – with cutretardant material, non-slip soles and steel toe caps.

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English 2 Safety Precautions

WARNING

To reduce the risk of eye injuries, wear tight-fitting safety goggles con‐ forming to standard EN 166 or a face shield. Make sure that the safety gog‐ gles and the face shield fit correctly.

Wear "personal" hearing protection – for exam‐ ple, ear defenders.

Wear a hard hat wherever there is any risk of falling objects.

Wear sturdy protective gloves made of a resistant material (e.g. leather).

STIHL can supply a comprehensive range of per‐ sonal protective equipment.

2.4 Transporting

Before any transport – even over short distances – switch off the machine, engage the chain brake and attach the chain scabbard. This avoids the risk of the saw chain starting unintentionally.

Always carry the chain saw by the handle – with the hot muffler away from your body, the guide bar must point to the rear. To avoid serious burn injuries, avoid touching hot parts of the machine, especially the surface of the muffler.

In vehicles: Properly secure your saw to prevent turnover, fuel spillage and damage.

2.5 Cleaning

Clean plastic parts with a cloth. Harsh detergents can damage the plastic.

Clean the dust and dirt off the machine – do not use any grease solvents for this purpose.

Clean the ventilation slots if necessary.

Do not use a high-pressure cleaner to clean the machine. The hard jet of water can damage parts of the machine.

2.6 Accessories

Only use those tools, guide bars, chains, chain sprockets, accessories or technically equivalent components that have been approved by STIHL for this machine. If you have any questions in this respect, consult a servicing dealer. Use only high quality tools and accessories. Otherwise, there may be a risk of accidents and damage to the machine.

STIHL recommends the use of genuine STIHL tools, guide bars, chains, chain sprockets and accessories. They are specifically designed to match your model and meet your performance requirements.

2.7 Refuelling

Gasoline is an extremely flammable fuel – keep clear of naked flames and fire – do not spill any fuel – no smok‐ ing.

Switch off the engine before refuelling.

Never refuel the machine while the engine is still hot – the fuel may spill over – risk of fire!

Open the fuel filler cap carefully so that any excess pressure is relieved gradually and fuel does not splash out.

The machine may only be refuelled in a well ven‐ tilated place. Clean the machine immediately if fuel is spilled. Do not spill fuel over your clothing – contaminated clothing must be changed imme‐ diately.

The machines can be equipped with the follow‐ ing filler caps as standard:

Cliplock filler cap (bayonet-type)

Place the cliplock filler cap (bayonettype) in position, turn as far as stop and fold the cliplock down.

This helps reduce the risk of unit vibrations caus‐ ing an incorrectly tightened filler cap to loosen or come off and spill quantities of fuel.

Look out for leaks! Never start the engine if fuel has been spilled or is leaking – Fatal burns may result!

2.8 Before Starting Work

Check that your saw is properly assembled and in good condition – refer to appropriate chapters in the instruction manual.

Check the fuel system for leaks, paying spe‐

–

cial attention to visible parts such as the tank

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2 Safety Precautions English

cap, hose connections and the manual fuel pump (on machines so equipped). If there are any leaks or damage, do not start the engine – risk of fire. Have your saw repaired by a serv‐ icing dealer before using it again. Check operation of chain brake, front hand

–

guard Correctly mounted guide bar

–

Correctly tensioned chain

–

The trigger and trigger lockout must move

–

freely and spring back to the idle position when they are released. Master Control lever must move easily to

–

STOP, 0 or † Check that the spark plug boot is secure – a

–

loose boot may cause arcing that could ignite combustible fumes and cause a fire. Never attempt to modify the controls or safety

–

devices in any way. Keep the handles dry and clean – free from oil

–

and dirt – for safe control of the saw. Make sure there is sufficient fuel and chain oil

–

in the tanks.

To reduce the risk of personal injury, do not operate your saw if it is damaged or not properly assembled.

2.9 Starting the chain saw

Always work on a level surface. Ensure a firm and secure footing. Hold the machine securely – the chain must not touch any objects or the floor – danger of injury due to the rotating saw chain.

Your chain saw is a one-person saw. Do not allow other persons to be in the working area – not even while starting.

Do not start the chain saw if the chain is in a cut.

Move at least 3 meters away from the place where the machine was refuelled and never start the motor in enclosed spaces.

Lock the chain with the chain brake before start‐ ing – risk of injury due to rotating chain!

Do not drop-start the engine – start as described in the Instruction Manual.

2.10 During operation

Ensure you always have a firm and safe footing. Take special care when the bark is wet – danger of slipping!

Always hold the chain saw firmly with both hands: Right hand on the rear handle – even if you are left-handed. To ensure reliable control, wrap your thumbs tightly around the handlebar and handle.

In the event of impending danger or in an emer‐ gency, switch off the engine immediately by mov‐ ing the Master Control lever / stop switch to STOP, 0 or †.

Never let the machine run unattended.

Exercise caution with slippery surfaces, water, snow, ice, steep slopes, uneven ground or green wood that has just been stripped of its bark – danger of slipping!

Use caution with tree stumps, roots, ditches – danger of stumbling!

Do not work alone – keep within calling distance of others who are trained in emergency proce‐ dures and can provide help in an emergency. Helpers at the cutting site must also wear protec‐ tive clothing (helmet!) and stand well clear of the branches being cut.

More care and attention than usual are required when wearing ear protection, as warning sounds (shouts, beeps, etc.) cannot be heard properly.

Take a break in good time to avoid tiredness or exhaustion – risk of accidents!

Dust (e. g., sawdust), fumes and smoke pro‐ duced while using the machine may be hazard‐ ous to health. If dust is generated, wear a dust mask.

When the engine is running: Note that the saw chain continues to rotate for a short period after you let go of the throttle trigger – coasting effect.

No smoking when working with or near the chain saw - risk of fire! Combustible fuel vapour may escape from the fuel system.

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English 2 Safety Precautions

Examine the saw chain periodically at short inter‐ vals and as soon as you note any tangible changes:

Switch off the engine; wait until the saw chain

–

is stationary Check condition and secure fitting

–

Check sharpness

–

Never touch the saw chain when the engine is running. If the saw chain becomes jammed by an object, switch off the engine immediately before attempting to remove the object – risk of injury!

Always turn off the engine before leaving the machine unattended.

To change the saw chain, switch off the engine. Risk of injury from the motor starting unintention‐ ally!

Keep easily combustible materials (e. g., wood chips, bark, dry grass, fuel) away from hot exhaust gases and hot mufflers – risk of fire! Mufflers with catalytic converters can become especially hot.

Never work without chain lubrication – monitor the oil level in the oil tank. Stop work immediately if the oil level in the oil tank is too low and top up with chain oil – see also "Topping up with chain oil" and "Check chain lubrication".

If the machine 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 – see also "Before starting work".

Check the fuel system for leaks and make sure the safety devices are working properly. Never continue using a machine that is not in perfect working order. In case of doubt, have the unit checked by your servicing dealer.

Check for correct idling, so that the saw chain stops moving when the throttle trigger is released. Check the idle setting regularly and correct when possible. Have the machine repaired by a STIHL servicing dealer if the saw chain still continues to move during idling.

The chain saw produces poisonous exhaust gases as soon as the engine starts. These gases may be colour‐ less and odourless and may contain unburnt hydrocarbons and benzene. Never work with the machine indoors or in poorly ventilated areas, even if your machine is equipped with a cata‐ lytic converter.

Ensure proper ventilation when working in trenches, hollows or other confined locations – risk of fatal injury from breathing toxic fumes!

If you feel sick, have a headache, vision prob‐ lems (e. g., your field of vision gets smaller), hearing problems, dizziness or inability to con‐ centrate, stop work immediately. Such symptoms may be caused by an excessively high concen‐ tration of exhaust emissions – risk of accident!

2.11 After finishing work

Switch off the motor, engage the chain brake and attach the chain scabbard.

2.12 Storage

When the machine is not in use, it should be stored in such a way that no-one is endangered. Secure the machine against unauthorised use.

Store the machine in a safe, dry room.

2.13 Vibrations

Prolonged use of the power tool may result in vibration-induced circulation problems in the hands (whitefinger disease).

No general recommendation can be given for the length of usage because it depends on several factors.

The period of usage is prolonged by:

Hand protection (wearing warm gloves)

–

Work breaks

–

The period of usage is shortened by:

Any personal tendency to suffer from poor cir‐

–

culation (symptoms: frequently cold fingers, tingling sensations). Low outside temperatures.

–

The force with which the handles are held (a

–

tight grip restricts circulation).

Continual and regular users should monitor closely the condition of their hands and fingers. If any of the above symptoms appear (e.g. tingling sensation in fingers), seek medical advice.

2.14 Maintenance and repairs

Always switch off the engine before any repair, cleaning or maintenance work and any work on the chain. Risk of injury if the engine starts inad‐ vertently!

Exception: adjustment of carburettor and idle speed.

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3 Reactive Forces English

The machine must be serviced regularly. Do not attempt any maintenance or repair work not described in the Instruction Manual. All other work should be carried out by a servicing dealer.

STIHL recommends that maintenance and repair work be carried out only by authorised STIHL dealers. STIHL dealers receive regular training and are supplied with technical information.

Use only high-quality spare parts. Otherwise, there may be a risk of accidents and damage to the machine. If you have any questions in this respect, consult a servicing dealer.

Do not modify the machine in any way – this may increase the risk of personal injury –risk of acci‐ dents!

To reduce the risk of fire due to ignition outside the cylinder, move the master control level to STOP, 0 or † before turning the engine over on the starter when the spark plug boot is removed or the spark plug is unscrewed!

Do not service or store the machine near a naked flame – risk of fire due to the fuel.

Check fuel cap regularly for tightness.

Use only spark plugs that are in perfect condition and have been approved by STIHL – see "Speci‐ fications".

Check ignition lead (insulation in good condition, secure connection).

Check that the muffler is in perfect working con‐ dition.

Do not use the machine if the muffler is damaged or missing – risk of fire, damage to hearing!

Never touch a hot muffler – risk of burns!

The condition of the anti-vibration elements influ‐ ences vibration behaviour – inspect anti-vibration elements periodically.

Inspect chain catcher – replace if damaged.

Switch off the engine

To check the chain tension

–

To retension the chain

–

To replace the chain

–

For remedying malfunctions

–

Observe sharpening instructions – for safe and proper handling, always keep the chain and guide bar in flawless condition. Keep the chain properly sharpened, tensioned and well lubrica‐ ted.

Change chain, guide bar and chain sprocket in due time.

Regularly check that the clutch drum is in perfect working condition.

Always store fuel and chain lubricant only in the specified type of containers and ensure they are correctly labelled. Store in a dry, cool and secure place protected against light and sunlight.

In the event of a chain brake malfunction, switch off the machine immediately – risk of injury! Con‐ sult a servicing dealer – do not use the machine until the malfunction has been remedied, see "Chain brake".

3 Reactive Forces

The most common reactive forces that occur dur‐ ing cutting are: kickback, pushback and pull-in.

3.1 Dangers of kickback

Kickback can result in serious or fatal injury.

(Kickback) occurs when the saw is suddenly thrown up and back in an uncontrolled arc towards the operator.

3.2 Kickback occurs if, e. g.,

when the upper quadrant of the bar nose unin‐

–

tentionally contacts wood or another solid

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English 4 Working Techniques

object, e.g. when another limb is touched acci‐ dentally during limbing. when the chain at the nose of the guide bar is

–

pinched in the cut.

3.3 Quickstop chain brake:

This device reduces the risk of injury in certain situations – it cannot prevent kickback. When activated, the chain brake stops the saw chain within a fraction of a second – see the section "Saw chain" in this Instruction Manual.

the chain pulls the saw forward – risk, always engage the spiked bumper securely in the tree or limb.

to reduce this

3.6 Pushback (B)

3.4 To reduce the risk of kickback

Work cautiously and avoid situations which

–

could cause kickback. Hold the saw firmly with both hands and main‐

–

tain a secure grip. always cut at full throttle.

–

Be aware of the location of the guide bar nose

–

at all times. do not cut with the bar nose.

–

Take special care with small, tough limbs, they

–

may catch the chain. never cut several limbs at once.

–

do not overreach.

–

never cut above shoulder height.

–

Use extreme caution when re-entering a previ‐

–

ous cut. Do not attempt plunge cuts if you are not

–

experience in this cutting technique. be alert for shifting of the log or other forces

–

that may cause the cut to close and pinch the chain. always cut with a correctly sharpened, prop‐

–

erly tensioned chain – the depth gauge setting must not be too large. Use a low kickback chain and a narrow radius

–

guide bar.

3.5 Pull-in (A)

Pushback occurs when the chain on the top of the bar is suddenly pinched, caught or encoun‐ ters a foreign object in the wood. The reaction of the chain drives the saw straight back toward the operator – to avoid this risk:

Be alert to situations that may cause the top of

–

the guide bar to be pinched Do not twist the guide bar in the cut

–

3.7 Exercise extreme caution

with leaners

–

with trees that have fallen unfavorably

–

between other trees and are under strain when working in blowdown areas.

–

In these cases, do not use a chain saw – use a hoist, winch or drag line instead.

Pull out exposed and cleared logs. Select clear area for cutting.

Deadwood (dry, decayed or rotted wood) repre‐ sents a considerable risk that is difficult to assess. Identifying the extent of the dangers is complicated, if not impossible. Use aids such as a cable winch or tractor in such cases.

When felling in the vicinity of roads, railways, power lines, etc., take extra precautions. If nec‐ essary, inform the police, utility company or rail‐ way authority.

4 Working Techniques

Sawing and felling work, including all related work (plunge cutting, limbing, etc.) may only be carried out by persons who have been specially trained and instructed. Persons who are not

Pull-in occurs when the chain on the bottom of the bar is suddenly pinched, caught or encoun‐ ters a foreign object in the wood. The reaction of

8 0458-209-0121-B

experienced chain saw users should not carry out any such work – increased risk of accidents!

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4 Working Techniques

English

Country-specific legislation on felling technique must be complied with during felling work.

4.1 Sawing

chain saw in the vicinity of easily combustible materials, dry plants or scrub. It is mandatory that you ask the responsible forestry office about the current fire hazard.

Do not operate your saw with the starting throttle lock engaged. Engine speed cannot be control‐ led with the throttle trigger in this position.

Work calmly and carefully – in daylight conditions and only when visibility is good. Ensure you do not endanger others – stay alert at all times.

It is advisable for first-time users to practice cut‐ ting logs on a sawbuck – see "Sawing thin wood".

Use the shortest possible guide bar: The chain, guide bar and chain sprocket must match each other and your saw.

If on a slope, stand on the uphill side of the log. Watch out for rolling logs.

When working at heights:

Always use a lift bucket

–

Never use the machine while standing on a

–

ladder or in a tree Never work on an insecure support

–

Never work above shoulder height

–

Never use the machine with just one hand

–

Begin cutting with the saw at full throttle and engage the spiked bumper firmly in the wood, and then continue cutting.

Position the saw so that your body is clear of the cutting attachment.

Always pull the saw out of the cut with the chain running.

Use your chain saw for cutting only. It is not designed for prying or shoveling away limbs, roots or other objects.

Do not underbuck freely hanging limbs.

Be careful when cutting scrub and young trees. Thin shoots can be scooped up by the chain saw and hurled towards the user.

Be careful when cutting splintered wood – Risk of injury from ejected pieces of wood!

Make sure your saw does not touch any foreign materials: Stones, nails, etc. may be flung off and damage the saw chain. The chain saw may kick back unexpectedly – risk of accident!

If a rotating saw chain hits a stone or another hard object, sparks may be generated which may ignite easily flammable materials under certain conditions. Also dried-out plants and brushwood are combustible, above all in hot and dry weather. If there is a risk of fire, do not use the

Never work without the spiked bumper because the saw may pull you forwards and off balance. Always hold the spiked bumper securely against the tree or limb.

At the end of the cut, the chain saw is no longer supported by the cutting attachment in the cut. The chain saw's weight must be borne by the user – risk of loss of control!

Sawing thin wood:

Use a sturdy and stable support – sawhorse.

–

Never hold the log with your leg or foot.

–

never allow another person to hold the log or

–

help in any other way.

Limbing

use a low kickback chain.

–

Work with the saw supported wherever possi‐

–

ble. do not stand on the log while limbing it.

–

do not cut with the bar nose.

–

watch for limbs which are under tension.

–

never cut several limbs at once.

–

Lying or standing logs under tension:

Always make the cuts in the correct order (first compression side (1), then tension side (2)), oth‐

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001BA040 KN

English 4 Working Techniques

erwise the cutting attachment may stick in the cut or kick back – risk of injury!

► Make relieving cut at the compression side (1) ► Make bucking cut at the tension side (2)

Be wary of pushback when making bucking cut from the bottom upwards (underbuck).

NOTICE

Do not cut a lying log at a point where it is touch‐ ing the ground because the saw chain will other‐ wise be damaged.

Ripping:

4.2 Preparing for felling

Check that there are no other persons in the fell‐ ing area – other than helpers.

Make sure no-one is endangered by the falling tree – the noise of your engine may drown any warning calls.

Maintain a distance of at least 2 1/2 tree lengths from the next felling site.

Determining direction of fall and escape path

Select gap in stand into which you want the tree to fall.

Pay special attention to the following points:

The natural inclination of the tree

–

Unusually heavy limb structure, asymmetrical

–

growth, damage to tree The wind direction and speed – do not fell in

–

high winds Direction of slope

–

Neighboring trees

–

Snow load

–

Take the general condition of the tree into

–

account – be especially careful with trunk damage or deadwood (brittle, rotten or dead wood)

Sawing technique without use of the spiked bumper – risk of pull-in – position the guide bar at as shallow an angle as possible – be especially careful – increased risk of kickback!

10 0458-209-0121-B

A Direction of fall

B Escape path (escape routes)

Establish escape paths for each worker –

–

approx. 45° diagonally opposite to the direc‐ tion of fall

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Clear escape paths, eliminate obstacles

–

Put down tools and equipment at a safe dis‐

–

tance – but not on the escape paths When felling, stand only to the side of the fall‐

–

Determine direction of fall with gunning sight on cover and fan housing

ing trunk and only move back laterally onto the escape path Plan escape paths on slopes parallel to the

–

slope When walking away along the escape path,

–

watch out for falling limbs and watch the top of the tree.

Preparing work area at base of tree

First clear the tree base and work area from

–

interfering limbs and brush to provide a secure footing. Carefully clear the base of the trunk (e.g., with

–

an axe) – sand, stones and other foreign objects will blunt the saw chain

Your chainsaw has a gunning sight on the cover and fan housing. Use this gunning sight.

Making the felling notch

When making a felling notch, align the chainsaw so that the notch lies at a right angle to the direc‐ tion of fall.

During the procedure, various sequences are permitted for making a felling notch with a bottom (horizontal) cut and top (angled) cut – comply with national legislation regarding felling techni‐ que. ► Make a bottom (horizontal) cut ► Make the top (angled) cut approx. 45°‑ 60° to

the bottom cut

Remove largest buttresses: first the largest

–

buttress – saw first vertically, then horizontally

Checking the direction of fall

– only if the tree is in sound condition

4.3 Felling notch

Preparing the felling notch

► Insert the chainsaw with guide bar in the bot‐

tom of the felling notch. The gunning sight must point in the planned direction of fall – if necessary, correct direction of fall by re-cutting

The felling notch (C) determines the direction of

the felling notch.

fall.

Important:

Make a felling notch at right angle to direction

–

of fall Saw as close to the ground as possible

–

Cut to a depth of approx. 1/5 to 1/3 of the

–

diameter of the trunk

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1/10

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English

4.4 Sapwood cuts

Sapwood cuts in long-fibered softwood help pre‐ vent sapwood splintering when the tree falls. Make cuts at both sides of the trunk at same height as bottom of felling notch to a depth of about 1/10 of trunk diameter. On large diameter trees, cut to no more than width of guide bar.

Do not make sapwood cuts if wood is diseased.

4.5 Basic information on felling cut

Basic dimensions

4 Working Techniques

With rotten trunks, leave a wider strip

–

Plunge cutting

For relieving cuts during shortening

–

For wood carving

–

► Use a low kickback saw chain and proceed

with special care

1. Begin cut by applying the lower portion of the guide bar nose – do not use upper portion because of risk of kickback. Cut at full strength until the depth of the kerf is twice the width of the guide bar

2. Swing the machine slowly into the plunge cutting position – risk of kickback and push‐ back!

3. Make the plunge cut very carefully. Risk of pushback.

The felling notch (C) determines the direction of fall.

The hinge (D) functions like a real hinge to guide the tree to the ground.

Width of hinge: approx. 1/10 of the trunk diam‐

–

eter Never saw through the hinge while felling –

–

otherwise the tree will fall in a direction other than the one planned – risk of accident! With rotten trunks, leave a wider hinge

–

The tree is felled with the felling cut (E).

Cut horizontally

–

1/10 (at least 3 cm) of tree diameter higher

–

than bottom of felling notch (C).

The holding strap (F) or stabilizing strap (G) sup‐ ports the tree and helps prevent it from falling prematurely.

Width of strip: approx. 1/10 to 1/5 of the trunk

–

diameter Do not cut into the strip during the felling cut

–

12 0458-209-0121-B

Where possible, use a plunge blade. The plunge blade and the upper/lower side of the guide bar are parallel.

During plunge cutting, the plunge bar helps to keep the hinge parallel in form, i.e. the same thickness at all points. To do this, guide the plunge bar parallel to the sink chord.

Felling wedges

Insert the felling wedge as soon as possible, i.e. as soon as no obstruction of saw control is to be expected. Position the felling wedge in the felling cut and drive in with suitable tools.

Only use aluminum or plastic wedges – do not use steel wedges. Steel wedges can seriously

Page 13

001BA260 KN

001BA261 KN

001BA273 KN

001BA263 KN

4 Working Techniques English

damage the saw chain and cause dangerous kickback.

Select suitable felling wedges dependent on the trunk diameter and the width of the kerf (ana‐ logue to felling cut (E)).

Contact the STIHL dealer for the selection of the felling wedge (suitable length, width and height).

4.6 Selecting the appropriate felling cut

The selection of the appropriate felling cut is dependent on the same tree characteristics that must be noted when determining the direction of fall and the escape paths.

There are various different features of these characteristics. This User Manual will only describe the two most commonly occurring var‐ iants:

left: Normal tree – vertically upright tree

with uniform crown

right: Leaner tree - crown pointing in direc‐

tion of fall

Shout a warning before starting the felling cut. ► Plunge cut the felling cut (E) – plunge the

guide bar fully in

► Engage the spiked bumper behind the hinge

and use this as the rotation point – reposition the chainsaw as little as possible

► Make the felling cut up to the hinge (1)

Do not cut into the hinge

–

► Make the felling cut up to the stabilizing

strap (2)

Do not cut into the stabilizing strap

–

► Set the felling wedge (3)

Shout a second warning immediately before the tree falls. ► Cut through the stabilizing strap, horizontal

level with the felling cut, with arms fully exten‐ ded

B) Thick trunks

Implement this felling cut when the trunk diame‐ ter is greater than the cutting length of the machine.

4.7 Felling cut with stabilizing strap (normal tree)

A) Thin trunks

Implement this felling cut when the trunk diame‐ ter is smaller than the cutting length of the chain‐ saw.

Shout a warning before starting the felling cut. ► Engage the spiked bumper at the height of the

felling cut and use this as the rotation point –

0458-209-0121-B 13

reposition the chainsaw as little as possible

► Tip of the guide bar must penetrate the wood

before the hinge (1) – guide the chainsaw absolutely horizontally and swivel as widely as possible

► Make the felling cut up to the hinge (2)

Do not cut into the hinge

–

Page 14

001BA274 KN

001BA265 KN

001BA266 KN

001BA267 KN

English 4 Working Techniques

► Make the felling cut up to the stabilizing

strap (3)

Do not cut into the stabilizing strap

–

The felling cut must be continued on the oppo‐

► Make the felling cut towards the holding strap

(2)

Cut horizontally

–

Do not cut into the holding strap.

–

site side of the trunk.

Ensure that the second cut is at the same level as the first cut. ► Plunge cut the felling cut ► Make the felling cut up to the hinge (4)

Do not cut into the hinge

–

► Make the felling cut up to the stabilizing

strap (5)

Do not cut into the stabilizing strap

–

Shout a second warning immediately before the tree falls. ► With outstretched arms, cut through the hold‐

ing strap at a downward angle from outside.

B) Thick trunks

► Set the felling wedge (6)

Shout a second warning immediately before the tree falls. ► Cut through the stabilizing strap, horizontal

level with the felling cut, with arms fully exten‐ ded

4.8 Felling Cut with Holding Strap (Leaner)

A) Thin trunks

Implement this felling cut when the trunk diame‐ ter is smaller than the cutting length of the chain‐ saw.

Perform this felling cut when the tree diameter is greater than the cutting length of the chainsaw. ► Engage the spiked bumper behind the holding

strap and use it as a pivot – avoid reposition‐ ing the chainsaw more than necessary.

► The guide bar nose enters the wood (1) before

it reaches the hinge – hold the chainsaw hori‐ zontally and swing it as far as possible.

Do not cut into the holding strap or hinge.

–

► Make the felling cut up to the hinge (2)

Do not cut into the hinge

–

► Make the felling cut up to the holding strap (3)

Do not cut into the holding strap.

–

The felling cut must be continued on the oppo‐ site side of the trunk.

Ensure that the second cut is at the same level

► Plunge cut the guide bar into the trunk until it

exits on the other side

► Make the felling cut (E) towards the hinge (1)

Cut horizontally

–

Do not cut into the hinge

–

as the first cut. ► Engage the spiked bumper behind the hinge

and use this as the rotation point – reposition the chainsaw as little as possible

14 0458-209-0121-B

Page 15

001BA268 KN

001BA248 KN

001BA244 KN

001BA245 KN

5 Cutting Attachment English

► Tip of the guide bar must penetrate the wood

before the holding strap (4) – guide the chain‐ saw absolutely horizontally and swivel as widely as possible

► Make the felling cut up to the hinge (5)

Do not cut into the hinge

–

► Make the felling cut up to the holding strap (6)

Do not cut into the holding strap.

–

Shout a second warning immediately before the tree falls. ► With outstretched arms, cut through the hold‐

ing strap at a downward angle from outside.

5 Cutting Attachment

A cutting attachment consists of the saw chain, guide bar and chain sprocket.

The cutting attachment that comes standard is designed to exactly match the chain saw.

5.1 Chain Scabbard

Your saw comes standard with a chain scabbard that matches the cutting attachment.

If guide bars of different lengths are mounted to the saw, always use a chain scabbard of the cor‐ rect length which covers the complete guide bar.

The length of the matching guide bars is marked on the side of the chain scabbard.

Guide bars longer than 90 cm require one scab‐ bard extension. Guide bars longer than 120 cm require two scabbard extensions.

Depending on the model, the scabbard exten‐ sion either comes standard with the saw or is available as a special accessory.

5.2 Fitting Chain Scabbard Exten‐ sion

The pitch (t) of the saw chain (1), chain

–

sprocket and the nose sprocket of the Rollo‐ matic guide bar must match. The drive link gauge (2) of the saw chain (1)

–

must match the groove width of the guide bar (3).

If non-matching components are used, the cut‐ ting attachment may be damaged beyond repair after a short period of operation.

► Push the scabbard extension and chain scab‐

bard together – the lugs (1) must engage in the chain scabbard.

0458-209-0121-B 15

Page 16

143BA034 KN

001BA185 KN

001BA186 KN

143BA003 KN

001BA187 KN

133BA024 KN

English 6 Mounting the Bar and Chain

6 Mounting the Bar and

6.3 Fitting the chain

Chain

6.1 Removing the chain sprocket cover

WARNING

Wear work gloves to protect your hands from the

► Unscrew the nuts and take off the chain

sprocket cover.

sharp cutters.

► Fit the chain – start at the bar nose.

► Turn the screw (1) counterclockwise until the

tensioner slide (2) butts against the left end of the housing slot.

6.2 Disengaging the chain brake.

► Fit the guide bar over the studs (1) – the cut‐

ting edges on the top of the bar must point to the right.

► Engage the peg of the tensioner slide in the

locating hole (2) –- place the chain over sprocket (3) at the same time.

► Turn the tensioning screw (4)clockwise until

there is very little chain sag on the underside of the bar – and the drive link tangs are engaged in the bar groove.

► Refit the sprocket cover and screw on the nuts

only fingertight.

► Go to chapter on "Tensioning the Saw Chain"

7 Tensioning the Chain

► Pull the hand guarad towards the front handle

until there is an audible click – the chain brake is disengaged.

16 0458-209-0121-B

Page 17

143BA007 KN

8 Checking Chain Tension English

Retensioning during cutting work: ► Shut off the engine. ► Loosen the nuts. ► Hold the bar nose up. ► Use a screwdriver to turn the tensioning

screw (1) clockwise until the chain fits snugly against the underside of the bar.

► While still holding the bar nose up, tighten

down the nuts firmly.

► Go to "Checking Chain Tension".

A new chain has to be retensioned more often than one that has been in use for some time. ► Check chain tension frequently – see chapter

on "Operating Instructions".

8 Checking Chain Tension

► Shut off the engine. ► Wear work gloves to protect your hands. ► The chain must fit snugly against the under‐

side of the bar and it must still be possible to pull the chain along the bar by hand.

► If necessary, retension the chain.

A new chain has to be retensioned more often than one that has been in use for some time. ► Check chain tension frequently – see chapter

on "Operating Instructions".

9 Fuel

The engine requires a mixture of gasoline and engine oil.

WARNING

Avoid direct skin contact with fuel and breathing in of gasoline fumes.

9.1 STIHL MotoMix

STIHL recommends using STIHL MotoMix. This pre-blended fuel is free of benzene and lead, is distinguished by a high octane rating, and always provides the proper mixing ratio.

STIHL MotoMix uses STIHL HP Ultra two-stroke engine oil for optimum engine life.

MotoMix is not available in all markets.

9.2 Mixing fuel

NOTICE

Unsuitable fuels or a mixing ratio that deviates from the specification can lead to severe engine damage. The engine, seals, fuel lines and fuel tank may be damaged if low-quality gasoline or engine oil is used.

9.2.1 Gasoline

Use only high-quality gasoline with an octane rat‐ ing of at least 90 ROC – leaded or unleaded.

Gasoline with an alcohol component exceeding 10% can cause impaired engine performance in engines with manually adjustable carburetors and thus should not be used in these engines.

Engines with M-Tronic deliver full engine per‐ formance using gasoline with an alcohol compo‐ nent of up to 27% (E27).

9.2.2 Engine oil

If you mix the fuel yourself, use only STIHL twostroke engine oil or another high-performance engine oil classified as 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 over the machine’s service life.

9.2.3 Mixing ratio

with STIHL two-stroke engine oil 1:50; 1:50 = 1 part oil + 50 parts gasoline

9.2.4 Examples

Quantity of gaso‐ line Liters Liters (ml) 1 0.02 (20) 5 0.10 (100) 10 0.20 (200) 15 0.30 (300) 20 0.40 (400) 25 0.50 (500)

► Pour oil into an approved safety fuel canister

first, then add gasoline and mix thoroughly

STIHL two-stroke engine oil 1:50

0458-209-0121-B 17

Page 18

001BA229 KN

001BA240 KN

001BA218 KN

001BA219 KN

English 10 Fueling

9.3 Storing fuel mixture

Store in approved safety fuel canisters only in a dry, cool and secure place protected against light and sunlight.

Fuel mixture deteriorates with age – mix only as much as needed for a few weeks. Do not store fuel mixture for longer than 30 days. The fuel mixture can become unusable more quickly if exposed to light, sunlight or low or high tempera‐ tures.

STIHL MotoMix however can be stored for up to 5 years without any problems. ► Shake the canister containing the fuel mixture

thoroughly before refueling

WARNING

Pressure may have built up in the canister – open it carefully.

► The fuel tank and the canister in which fuel

mixture is stored should be cleaned thoroughly from time to time

Residual fuel and the liquid used for cleaning must be disposed of in accordance with regula‐ tions and without harming the environment!

Depending on the version, filler cap and fuel tank may be available with or without markings.

left: Filler cap - without markings right: Filler cap - with markings on cap

and fuel tank

10.3 Filler cap without marking

10.3.1 To open:

10 Fueling

10.1 Preparing the machine

► Before fueling, clean the cap and the area

around it to ensure that no dirt falls into the fuel tank

► Always position the machine so that the cap is

facing upwards

► Open bracket until it is vertical

► Turn the filler cap counterclockwise

(approx. 1/4 turn)

10.2 Different markings on filler caps

Filler caps and fuel tanks can be marked differ‐ ently.

18 0458-209-0121-B

Page 19

001BA224 KN

001BA220 KN

001BA221 KN

001BA222 KN

001BA223 KN

001BA225 KN

10 Fueling English

► Remove the filler cap

10.3.2 Filling with fuel

Take care not to spill fuel while fueling and do not overfill the tank.

STIHL recommends using the STIHL filling sys‐ tem for fuel (special accessory). ► Fill with fuel

10.3.3 Closing

Bracket is in an upright position: ► Position filler cap – position markings on the

filler cap and the filler port must be aligned with each other.

► Push the filler cap down as far as it will go

► Fold down the bracket as far as it will go

10.3.4 Checking the lock

The lug on the bracket must engage entirely in

–

the recess (arrow)

► Grip the filler cap – if the filler cap cannot be

moved or removed, then it is closed properly

10.3.5 If the filler cap can be moved or removed

The base of the filler cap is twisted in relation to the upper part.

► Hold the filler cap down and turn it clockwise

until it engages

0458-209-0121-B 19

Page 20

001BA227 KN

001BA226 KN

001BA236 KN

001BA232 KN

001BA234 KN

001BA237 KN

English 10 Fueling

left: Base of filler cap twisted right: Base of filler cap correctly posi‐

tioned

► Fit filler cap and turn it counterclockwise until it

engages in the seat of the filling port

► Continue to turn the filler cap counterclockwise

(approx. 1/4 turn) – this will twist the base of the cap into the correct position

► Turn the filler cap clockwise and close it – see

the section "Closing" and "Checking the lock"

10.4 Filler cap with marking

10.4.1 To open:

► Turn filler cap (approx. 1/4 turn)

Markings on filler cap and fuel tank must align

► Remove the filler cap

10.4.2 Filling with fuel

Take care not to spill fuel while fueling and do not overfill the tank.

STIHL recommends using the STIHL filling sys‐ tem for fuel (special accessory). ► Fill with fuel

► Open bracket

20 0458-209-0121-B

Page 21

001BA234 KN

001BA233 KN

001BA231 KN

001BA235 KN

001BA241 KN

001BA238 KN

001BA239 KN

10 Fueling English

10.4.3 Closing

Bracket is in an upright position: ► Position filler cap – markings on filler cap and

fuel tank must align

► Push the filler cap down as far as it will go

► Hold the filler cap down and turn it clockwise

until it engages

Then the markings on filler cap and fuel tank will align

Filler cap is locked

10.4.4 If the filler cap will not lock onto the fuel tank

The base of the filler cap is twisted in relation to the upper part. ► Remove the filler cap from the fuel tank and

look at it from above

left: Base of filler cap is twisted – interior

marking (1) is aligned with the exte‐ rior marking

right: Base of filler cap is in the correct

position – interior marking is below the bracket. It does not align with the exterior marking

► Fit filler cap and turn it counterclockwise until it

engages in the seat of the filling port

► Continue to turn the filler cap counterclockwise

(approx. 1/4 turn) – this will twist the base of

► Close bracket lock

the cap into the correct position

0458-209-0121-B 21

Page 22

001BA158 KN

143BA024 KN

English 11 Chain Lubricant

► Turn the filler cap clockwise and close it – see

section "Closing"

11 Chain Lubricant

For automatic and reliable lubrication of the chain and guide bar – use only an environmen‐ tally compatible quality chain and bar lubricant. Rapidly biodegradable STIHL BioPlus is recom‐ mended.

NOTICE

Biological chain oil must be resistant to aging (e.g. STIHL BioPlus), since it will otherwise quickly turn to resin. This results in hard deposits that are difficult to remove, especially in the area of the chain drive and chain. It may even cause the oil pump to seize.

The service life of the chain and guide bar depends on the quality of the lubricant. It is therefore essential to use only a specially formu‐ lated chain lubricant.

WARNING

Do not use waste oil. Renewed contact with waste oil can cause skin cancer. Moreover, waste oil is environmentally harmful.

► Thoroughly clean the oil filler cap and the area

around it to ensure that no dirt falls into the tank.

► Position the machine so that the filler cap is

facing up.

► Open the filler cap.

12.2 Fill up with chain oil.

► Refill the chain oil tank every time you refuel.

Take care not to spill chain oil while refilling and do not overfill the tank.

STIHL recommends you use the STIHL filler noz‐ zle for chain oil (special accessory). ► Close the filler cap.

There must still be a small amount of oil in the oil tank when the fuel tank is empty.

If the oil level in the tank does not go down, the reason may be a fault in the oil supply system: Check chain lubrication, clean the oilways, con‐ tact your dealer for assistance if necessary STIHL recommends that you have servicing and repair work carried out exclusively by an author‐ ized STIHL servicing dealer.

13 Checking Chain Lubrica‐

tion

NOTICE

Waste oil does not have the necessary lubricat‐ ing properties and is unsuitable for chain lubrica‐ tion.

12 Filling Chain Oil Tank

The saw chain must always spin off a small

12.1 Preparations

22 0458-209-0121-B

amount of oil.

NOTICE

Never operate your machine without chain lubri‐ cation. If the saw chain runs dry, the cutting attachment may very quickly be damaged beyond repair. Before starting work, always check the chain lubrication and oil level in the tank.

Every new saw chain needs a run-in time of 2 to 3 minutes.

Page 23

143BA011 KN

143BA012 KN

139BA016 KN

14 Chain Brake English

After the saw chain has run in, check the tension of the chain and correct if necessary – see "Checking the chain tension".

14 Chain Brake

14.1 Saw chain, lock

in an emergency

–

when starting

–

when idling

–

Press the hand guard towards the nose of the guide bar with the left hand - or automatically due to kickback: Saw chain is blocked - and stops running.

14.2 Disengage the chain brake.

The chain brake is also activated by the inertia of the front hand guard if the kickback force of the saw is high enough: The hand guard is acceler‐ ated toward the bar nose – even if your left hand is not behind the hand guard, e.g. during felling cut.

The chain brake will operate only if the hand guard has not been modified in any way.

14.3 Checking Operation of the

Chain Brake

Before starting work: Run engine at idle speed, engage the chain brake (push hand guard towards bar nose) and open the throttle wide for (no more than 3 seconds) – the chain must not rotate. The hand guard must be free of dirt and easily moveable.

14.4 Chain Brake Maintenance

The chain brake is subject to (normal wear). It is necessary to have it serviced and maintained regularly by trained personnel. STIHL recom‐ mends that maintenance and repair work be car‐ ried out only by authorised STIHL dealers. The following intervals must be complied with:

Full-time use: quarterly Part-time use: every six months occasional use: annually

15 Winter Operation

15.1 At temperatures below +10 °C

► Pull the hand guard back towards the front

handle.

NOTICE

The chain brake must be released before open‐ ing the throttle (except during functional check‐ out) and before sawing.

Running the engine at high revs with the chain brake engaged (chain locked) will quickly dam‐ age the engine and chain drive (clutch, chain brake).

0458-209-0121-B 23

► Turn the knob above the rear handle to the left

– slot vertical

► Pull off the carburetor box cover toward the

rear

Page 24

139BA001 KN

139BA002 KN

139BA005 TR

139BA018 KN

139BA019 KN

English 15 Winter Operation

► Lift off the prefilter (1)

►

► Unplug the spark plug boot (2) from the spark

plug

Insert the prefilter (1) so that the r symbol (winter operation) is on top

► Replace the cover and lock it in place with the

knob

Heated air is now drawn in from around the cylin‐ der and mixed with cold air – this helps prevent carburetor icing.

15.2 At temperatures above +20 °C

►

Always return the slide and prefilter to the s position (summer operation)!

► Pry the slide (3) out of the shroud using a

screwdriver

► Turn the slide around by 180° and reinsert it to

the left next to the spark plug

► Press the spark plug boot onto the spark plug

again

24 0458-209-0121-B

Page 25

STOP

001BA140 KN

209BA014 KN

16 Information Before You Start English

NOTICE

Risk of engine malfunction – overheating!

16 Information Before You

Start

16.1 The four positions of the Mas‐ ter Control lever

When the throttle trigger is squeezed, the Master Control lever returns from warm start n to the operating position F.

To switch off the engine, set the Master Control lever to Stop 0.

17 Starting / Stopping the

Engine

17.1 Starting the engine

17.1.1 only versions with decompression valve

► press on the grommet in the direction shown

by the arrow – the decompression valve is opened

It is closed automatically when the engine starts for the first time. ► for this reason, press the decompression valve

again before each additional starting proce‐ dure

Stop 0 – engine off – ignition is switched off Operating position F – engine is running or can

start Warm start n – this position is for starting the

warm engine Cold start l – this position is for starting the

cold engine

16.2 Adjust Master Control lever

The throttle trigger lockout and throttle trigger must be pressed simultaneously to adjust the Master Control lever from the operating posi‐ tion F to cold start l.

To set the Master Control lever to warm start n, first set it to cold start l, then push the Master Control lever into the warm start n position.

Changing to warm start n is only possible from the cold start l position.

0458-209-0121-B 25

Page 26

209BA022 KN

STOP

143BA018 KN

English 17 Starting / Stopping the Engine

17.1.2 For all versions

► Observe safety precautions ► Push the hand guard (1) forwards:

the saw chain is blocked

► Simultaneously press the throttle trigger lock‐

out (2) and throttle trigger (3) – set master control lever (4)

Position cold start l

If engine is cold (even if the engine has stalled

–

during opening of throttle after starting)

Position warm start n

If engine is warm (once the engine has been

–

running for approx. one minute)

► Place the chain saw securely on the ground

and assume a steady stance – the saw chain must not touch any objects or the ground

WARNING

There must not be anyone within the swivel range of the saw.

► With the left hand on handlebar, press the

chain saw firmly against the ground – thumb wrapped around the handlebar

► Place your right foot into the rear handle

26 0458-209-0121-B

Page 27

143BA019 KN

143BA020 KN

STOP

209BA008 KN

17 Starting / Stopping the Engine English

on the handlebar – do not pull the starter rope out all the way – risk of breakage! Do not let the starter grip snap back – guide it vertically back into the housing so that the starter rope can rewind properly

With a new engine, pull the starter rope several times to prime the fuel line.

another possibility: ► Clamp the rear handle between the knees or

thighs

► Grip the handlebar firmly with the left hand –

thumb wrapped around the handlebar

when engine begins to fire: ► press the decompression valve again ►

Move the Master Control lever (4) to the n position and continue cranking – once the engine runs, immediately blip the throttle trig‐ ger (5); the Master Control lever (4) jumps to run F (6), and the engine begins to idle

► with the right hand, pull the starter grip slowly

until you feel it engage – and then give it a brisk strong pull – simultaneously press down

0458-209-0121-B 27

Page 28

143BA012 KN

English 18 Operating Instructions

NOTICE

The engine must be switched to idle immediately – otherwise, damage to the engine housing and chain brake may occur when the chain brake is locked.

17.3 When the fuel tank has run

completely empty and then been refueled

► Press the decompression valve ► Pull the starter rope several times to prime the

fuel line

► Restart the engine

17.4 If the engine does not start

The Master Control lever was not returned to its "warm start" position n in time when the engine turned over the first time and has now flooded. ► Remove the spark plug, see "Spark plug" ► Dry the spark plug ► Crank the engine several times with the starter

– to clear the combustion chamber ► Reinstall the spark plug, see "Spark plug" ►

Set the Master Control lever to warm start n

– even if the engine is cold ► Press the decompression valve ► Restart the engine

18 Operating Instructions

18.1 During the break-in period

A factory new machine should not be run at high revs (full throttle off load) for the first three tank fillings. This avoids unnecessarily high loads dur‐ ing the break-in period. As all moving parts have

►

Pull the hand guard toward the handlebar: U the chain brake is released – the chain saw is ready for use

NOTICE

Open the throttle only when the chain brake is off. Running the engine at high revs with the chain brake engaged (chain locked) will quickly damage the engine and chain drive (clutch, chain brake).

► first always check chain lubrication

17.1.3 At very low temperatures ► Let the engine warm up briefly with the throttle

slightly open

► if necessary, configure for winter operation,

see "Winter Operation"

17.2 Switching off the engine

► Move the master control lever to the stop posi‐

tion 0

to bed in during the break-in period, the frictional resistances in the shortblock are greater during this period. The engine develops its maximum power after about 5 to 15 tank fillings.

18.2 During work

NOTICE

Do not make the mixture leaner to achieve an apparent increase in power – this could damage the engine – see "Adjusting the Carburetor".

NOTICE

Open the throttle only when the chain brake is off. Running the engine at high revs with the chain brake engaged (chain locked) will quickly damage the shortblock and chain drive (clutch, chain brake).

18.2.1 Check chain tension frequently

A new saw chain must be retensioned more fre‐ quently than one that has been in use already for an extended period.

28 0458-209-0121-B

Page 29

001BA157 KN

143BA026 KN

19 Oil Quantity Control English

18.2.2 Chain cold

Tension is correct when the chain fits snugly against the underside of the bar but can still be pulled along the bar by hand. Retension if neces‐ sary – see "Tensioning the Saw Chain".

18.2.3 Chain at operating temperature

The chain stretches and begins to sag. The drive links must not come out of the bar groove on the underside of the bar – the chain may otherwise jump off the bar. Retension the chain – see "Ten‐ sioning the Saw Chain".

NOTICE

The chain contracts as it cools down. If it is not slackened off, it can damage the crankshaft and bearings.

18.2.4 After a long period of full-throttle oper‐ ation

After a long period of full-throttle operation, allow engine to run for a while at idle speed so that the heat in the engine can be dissipated by flow of cooling air. This protects engine-mounted com‐ ponents (ignition, carburetor) from thermal over‐ load.

18.3 After finishing work

► Slacken off the chain if you have retensioned it

at operating temperature during work.

Use the adjusting screw (1) (on underside of machine) to vary the oil feed rate as required.

Ematic position (E), medium oil flow rate – ► turn the adjusting screw to "E" (Ematic posi‐

tion).

To increase oil feed – ► turn the adjusting screw clockwise.

Turn reduce oil feed – ► turn the adjusting screw counterclockwise.

NOTICE

The chain must always be wetted with a film of lubricant.

20 Taking Care of the Guide

Bar

NOTICE

Always slacken off the chain again after finishing work. The chain contracts as it cools down. If it is not slackened off, it can damage the crankshaft and bearings.

18.3.1 Short-term storage

Wait for engine to cool down. Keep the machine with a full tank of fuel in a dry place, well away from sources of ignition, until you need it again.

18.3.2 Long-term storage

See "Storing the machine"

19 Oil Quantity Control

Adjustable flow oil pump is a special option.

Different quantities of oil are required for different bar lengths, types of wood and cutting techni‐ ques.

► Turn the guide bar over – every time you

sharpen the chain and every time you replace the chain – this helps avoid one-sided wear, especially at the nose and underside of the bar.

► Regularly clean the oil inlet hole (1), the oil‐

way (2) and the bar groove (3)

► Measure the groove depth – with the scale on

the filing gauge (special accessory) – in the area used most for cutting

Chain type Chain pitch Minimum

groove depth

Picco 1/4" P 4.0 mm

0458-209-0121-B 29

Page 30

139BA016 KN

139BA017 KN

English 21 Air Filter System

Rapid 1/4“ 4.0 mm Picco 3/8" P 5.0 mm Rapid 3/8“; 0.325“ 6.0 mm Rapid 0.404“ 7.0 mm

If groove depth is less than specified: ► Replace the guide bar

The drive link tangs will otherwise scrape along the bottom of the groove – the cutters and tie straps will not ride on the bar rails.

21 Air Filter System

The air filter system can be adapted to suit differ‐ ent operating conditions by installing a choice of filters. Changing the filter is quick and simple.

The saw comes standard with either a fabric filter or a fleece filter.

21.1 Fabric filter

For normal operating conditions and winter oper‐ ation.

21.2 Fleece filter

For dry and very dusty work areas.

22 Cleaning the Air Filter

22.1 If there is a noticeable loss of

engine power

► Press the throttle trigger lockout and move the

Master Control lever to cold start k

► Turn the knob above the rear handle to the left

– slot vertical

► Pull off the carburetor box cover toward the

rear

► Clean away loose dirt from around the filter

Fouled air filters will impair engine performance, increase fuel consumption and make the machine more difficult to start.

► Pull off the prefilter (1) upward, unscrew slot‐

ted nut (2) and remove main filter (3)

► Separate the halves of the filter from one

another

► Knock out the filter or blow it clear with com‐

pressed air from the inside outwards.

In case of stubborn dirt: ► Wash the filter in STIHL special-purpose

cleaner (special accessories) or a clean, nonflammable cleaning liquid (e.g., warm soapy water) and dry it.

22.1.1 Do not clean fleece filters with a brush! ► Replace damaged filter ► Reinstall filter

23 Adjusting the Carburetor

23.1 General Information

The carburetor comes from the factory with a standard setting.

This setting provides an optimum fuel-air mixture under most operating conditions.

Changing the setting of the high speed screw alters the engine's power output and the maxi‐ mum off-load engine speed.

23.2 Standard Setting

► Shut off the engine. ► Check the air filter and clean or replace if nec‐

essary.

► Check the spark arresting screen (not in all

models, country-specific) in the muffler and clean or replace if necessary.

30 0458-209-0121-B

Page 31

209BA010 KN

209BA009 KN

209BA011 KN

24 Spark Arresting Screen in Muffler English

23.3 Carburetors with H = 1 and

L = 1

► Carefully screw both adjusting screws down

onto their seats (clockwise).

► Turn the high speed screw (H) one full turn

counterclockwise.

► Turn the low speed screw (L) one full turn

counterclockwise.

23.4 Carburetors with H = 3/4 and

L = 1/4

► Turn high speed screw (H) counterclockwise

as far as stop (no more than 3/4 turn).

► Turn the low speed screw (L) carefully clock‐

wise as far as stop, then turn it back 1/4 turn.

23.5 Adjusting Idle Speed

► Carry out the standard setting. ► Start and warm up the engine.

23.5.1 Engine stops while idling ► Turn the idle speed screw (LA) clockwise until

the chain begins to run – then back it off 1/4 turn.

23.5.2 Saw chain runs while engine is idling ► Turn the idle speed screw (LA) counterclock‐

wise until the chain stops moving – then turn it another 1/4 turn in the same direction.

WARNING

If the chain continues moving when the engine is idling, have your saw checked and repaired by your servicing dealer.

23.5.3 Erratic idling behavior, poor accelera‐ tion (even though standard setting of low speed screw is correct)

Idle setting is too lean ► Turn the low speed screw (L) counterclock‐

wise, no further than stop on carburetors with L = 1/4, until the engine runs and accelerates smoothly.

It is usually necessary to change the setting of the idle speed screw (LA) after every correction to the low speed screw (L).

23.5.4 Fine Tuning for Operation at High Alti‐ tude

A slight correction of the setting may be neces‐ sary if engine does not run satisfactorily: ► Carry out the standard setting. ► Warm up the engine. ► Turn high speed screw (H) slightly clockwise

(leaner) – no further than stop.

NOTICE

After returning from high altitude, reset the car‐ buretor to the standard setting.

If the setting is too lean there is a risk of engine damage due to insufficient lubrication and over‐ heating.

24 Spark Arresting Screen in

Muffler

0458-209-0121-B 31

In some countries, the muffler is fitted with a spark arresting screen.

Page 32

139BA020 KN

139 BA021 KN

139BA016 KN

139BA001 KN

139BA002 KN

English 25 Spark Plug

WARNING

To reduce the risk of fire caused by hot particles escaping from the machine, never operate the machine without a spark arresting screen, or with the spark arresting screen damaged. Do not modify the muffler or spark arresting screen. To reduce the risk of fire from accumulated debris such as pine needles, branches or leaves, ensure that the muffler plugs are in place before taking up work.

NOTICE

According to the law or regulations in some countries or federal states, certain operations may only be carried out if a properly serviced spark arresting screen is provided.

► If the engine is down on power, check the

spark arresting screen in the muffler

► Wait for the muffler to cool down

25 Spark Plug

► If the engine is down on power, difficult to start

or runs poorly at idle speed, first check the spark plug.

► Fit a new spark plug after about 100 operating

hours – or sooner if the electrodes are badly eroded. Install only suppressed spark plugs of the type approved by STIHL – see "Specifica‐ tions".

25.1 Removing the spark plug

► Move the Master Control lever to 0

► Turn the knob above the rear handle to the left

– slot vertical

► Pull off the carburetor box cover toward the

rear

► Unscrew and remove the nuts (1)

► Lift off the prefilter (1)

► Remove the cover (2). ► Remove the spark arresting screen (3) ► Clean the dirty spark arresting screen, replace

when damaged or heavily carbonized ► Refit the spark arresting screen ► Install the cover ► If the muffler plugs are missing or damaged,

install new plugs

► Unplug spark plug boot (2) ► Unscrew spark plug

32 0458-209-0121-B

Page 33

000BA039 KN

000BA045 KN

001BA121 KN

26 Storing the Machine English

25.2 Checking the Spark Plug

► Clean dirty spark plug. ► Check electrode gap (A) and readjust if neces‐

sary – see "Specifications". ► Rectify the problems which have caused foul‐

ing of the spark plug.

Possible causes are:

Too much oil in fuel mix.

–

Dirty air filter.

–

Unfavorable running conditions.

–

► Dispose of fuel properly in accordance with

local environmental requirements.

► If a manual fuel pump is fitted: Press the man‐

ual fuel pump at least 5 times.

► Start the engine and run it at idling speed until

it stops.

► Remove saw chain and guide bar; clean and

spray with protective oil

► Thoroughly clean the machine - pay special

attention to the cylinder fins and air filter

► When using biological chain oil (e.g. STIHL

BioPlus), fill the lubricant oil tank

► Store the machine in a dry and secure location

Keep out of the reach of children and other unauthorized persons

27 Checking and Replacing

the Chain Sprocket

► Remove chain sprocket cover, saw chain and

guide bar.

► Release chain brake – pull hand guard against

the front handle

27.1 Fit new chain sprocket

WARNING

after use of two saw chains or earlier

Arcing may occur if the adapter nut (1) is loose or missing. Working in an easily combustible or explosive atmosphere may cause a fire or an explosion. This can result result in serious inju‐ ries or damage to property.

► Use resistor type spark plugs with a properly

tightened adapter nut.

25.3 Installing the spark plug

► Fit the spark plug by hand and screw it in ► Tighten spark plug with combination wrench ► Press the spark plug boot firmly onto the spark

plug

–

if the wear marks (arrows) are deeper than

–

0.5 mm – otherwise the service life of the saw chain is reduced – use check gauge (special accessory) to test

Using two saw chains in alternation helps pre‐ serve the chain sprocket.

STIHL recommends use of original STIHL chain sprockets in order to ensure optimal functioning of the chain brake.

26 Storing the Machine

For periods of about 30 days or longer ► Drain and clean the fuel tank in a well-ventila‐

ted area.

0458-209-0121-B 33

Page 34

001BA122 KN

689BA027 KN

English 28 Maintaining and Sharpening the Saw Chain

28 Maintaining and Sharpen‐

ing the Saw Chain

28.1 Sawing effortlessly with a prop‐ erly sharpened saw chain

A properly sharpened saw chain cuts through wood effortlessly even with very little pushing.

Never use a dull or damaged saw chain – this leads to increased physical strain, increased vibration load, unsatisfactory cutting results and increased wear. ► Clean the saw chain ► Check the saw chain for cracks and damaged

rivets

► Replace damaged or worn chain components

and adapt these parts to the remaining parts in terms of shape and level of wear – rework accordingly

Carbide-tipped (Duro) saw chains are especially wear-resistant. For an optimal sharpening result, STIHL recommends STIHL servicing dealers.

► Use a screwdriver to remove the E-clip (1) ► Remove the washer (2) ► Remove rim sprocket (3) ► Inspect transport profile on the clutch drum (4)

– if there are also heavy signs of wear, also replace the clutch drum

► Remove clutch drum or spur chain

sprocket (5) including needle cage (6) from the crankshaft – with QuickStop Super chain brake, press throttle trigger lockout before‐ hand

WARNING

Compliance with the angles and dimensions lis‐ ted below is absolutely necessary. An improperly sharpened saw chain – especially depth gauges that are too low – can lead to increased kickback tendency of the chain saw – risk of injury!

28.2 Chain pitch

27.2 Install spur chain sprocket / rim

► Clean crankshaft stub and needle cage and

► Slide needle cage onto the crankshaft stub ► After refitting, turn the clutch drum and/or spur

► Refit the rim sprocket – cavities toward the

► Refit washer and E-clip on the crankshaft

sprocket

lubricate with STIHL lubricant (special acces‐ sory)

chain sprocket approx. 1 full turn so that the carrier for the oil pump drive engages – with QuickStop Super chain brake, press throttle trigger lockout beforehand

outside

The chain pitch marking (a) is embossed in the area of the depth gauge of each cutter.

Marking (a) Chain pitch Inches mm 7 1/4 P 6.35 1 or 1/4 1/4 6.35 6, P or PM 3/8 P 9.32 2 or 325 0.325 8.25 3 or 3/8 3/8 9.32 4 or 404 0.404 10.26

34 0458-209-0121-B

Page 35

689BA021 KN

689BA025 KN

001BA203 KN

28 Maintaining and Sharpening the Saw Chain English

The diameter of file to be used depends on the chain pitch – see table "Sharpening tools".

The angles of the cutter must be maintained dur‐ ing resharpening.

28.4 File holder

28.3 Sharpening and side plate angles

► Use a file holder

Always use a file holder (special accessory, see table "Sharpening tools") when sharpening saw chains by hand. File holders have markings for the sharpening angle.

Use only special saw chain files! Other files are

A Sharpening angle

STIHL saw chains are sharpened with a 30° sharpening angle. Ripping chains, which are sharpened with a 10° sharpening angle, are exceptions. Ripping chains have an X in the des‐ ignation.

B Side plate angle

unsuitable in terms of shape and type of cutting.

28.5 To check the angles

The correct side plate angle results automatically when the specified file holder and file diameter are used.

Tooth shapes Angle (°) A B Micro = semi-chisel tooth, e. g., 63 PM3, 26 RM3, 36 RM Super = full chisel tooth, e. g., 63 PS3, 26 RS, 36 RS3 Ripping chain, e. g., 63 PMX, 36 RMX

The angles must be identical for all cutters in the saw chain. Varying angles: Rough, uneven run‐ ning of the saw chain, increased wear – even to the point of saw chain breakage.

0458-209-0121-B 35

30 75

30 60

10 75

STIHL filing gauge (special accessory, see table "Sharpening tools") – a universal tool for check‐ ing sharpening and side plate angles, depth gauge setting, and tooth length, as well as clean‐ ing grooves and oil inlet holes.

28.6 Proper sharpening

► Select sharpening tools in accordance with

chain pitch ► Clamp guide bar if necessary ► Block saw chain – push the hand guard for‐

ward ► To advance the saw chain, pull the hand

guard toward the handlebar: The chain brake

is disengaged. With the Quickstop Super

chain brake system, additionally press the

throttle trigger lockout ► Sharpen frequently, removing little material –

two or three strokes of the file are usually suffi‐

cient for simple resharpening

Page 36

689BA018 KN

90°

689BA043 KN

689BA023 KN

689BA061 KN

English 28 Maintaining and Sharpening the Saw Chain

28.7 Depth gauge setting

The depth gauge determines the depth to which the cutter penetrates the wood and thus the chip thickness.

a Required distance between depth gauge and

cutting edge

When cutting softwood outside of the frost sea‐ son, the distance can be increased by up to

0.2 mm (0.008").

► Guide the file: horizontally (at a right angle to

the side surface of the guide bar) in accord‐ ance with the specified angle – according to the markings on the file holder – rest the file

holder on the tooth head and the depth gauge ► File only from the inside outward ► The file only sharpens on the forward stroke –

lift the file on the backstroke ► Do not file tie straps and drive links ► Rotate the file a little periodically in order to

avoid uneven wear ► To remove file burr, use a piece of hardwood ► Check angle with file gauge

All cutters must be equally long.

With varying cutter lengths, the cutter heights also vary and cause rough running of the saw chain and chain breakage. ► All cutters must be filed down equal to the

length of the shortest cutter – ideally, one

should have this done by a servicing dealer

using an electric sharpener

Chain pitch Depth gauge Distance (a) Inches (mm) mm (Inches) 1/4 P (6.35) 0.45 (0.018) 1/4 (6.35) 0.65 (0.026) 3/8 P (9.32) 0.65 (0.026)

0.325 (8.25) 0.65 (0.026) 3/8 (9.32) 0.65 (0.026)

0.404 (10.26) 0.80 (0.031)

28.8 Lowering the depth gauges

The depth gauge setting is lowered when the cutter is sharpened. ► Check the depth gauge setting after each

sharpening

► Lay the appropriate file gauge (1) for the chain

pitch on the saw chain and press it against the cutter to be checked – if the depth gauge pro‐ trudes past the file gauge, the depth gauge

36 0458-209-0121-B

must be reworked

Saw chains with humped drive link (2) – upper part of the humped drive link (2) (with service

Page 37

689BA051 KN

689BA044 KN

689BA052 KN

28 Maintaining and Sharpening the Saw Chain English

mark) is lowered at the same time as the depth gauge of the cutter.

WARNING

The rest of the humped drive link must not be filed; otherwise, this could increase the tendency of the chain saw to kick back.

► Lay the file gauge on the saw chain – the high‐

est point of the depth gauge must be flush with the file gauge

► After sharpening, clean the saw chain thor‐

oughly, removing any filings or grinding dust – lubricate the saw chain thoroughly

► In the event of extended periods of disuse,

store saw chains in cleaned and oiled condi‐ tion

► Rework the depth gauge so that it is flush with

the file gauge

► Afterwards, dress the leading edge of the

depth gauge parallel to the service mark (see

arrow) – when doing this, be careful not to fur‐

ther lower the highest point of the depth gauge

WARNING

Depth gauges that are too low increase the kick‐ back tendency of the chain saw.

0458-209-0121-B 37

Page 38

English 29 Maintenance and Care

Sharpening tools (special accessories) Chain pitch Round file^Round file File holder File gauge Taper square

file

Sharpening

set

Inches (mm) mm (Inches)Part number Part number Part number Part number Part number

1/4P (6.35) 3.2 (1/8) 5605 771

3206

5605 750 4300

0000 893 4005

0814 252 3356

5605 007 1000

1/4 (6.35) 4.0 (5/32) 5605 772 40065605 750 43271110 893 40000814 252 33565605 007

1027

3/8 P (9.32) 4.0 (5/32) 5605 772

4006

0.325 (8.25) 4.8 (3/16) 5605 772

4806

3/8 (9.32) 5.2 (13/64) 5605 772

5206

0.404 (10.26) 5.5 (7/32) 5605 772

5506

consisting of file holder with round file, taper square file and file gauge

5605 750 4327 5605 750 4328 5605 750 4329 5605 750 4330

1110 893 4000 1110 893 4000 1110 893 4000 1106 893 4000

0814 252 3356 0814 252 3356 0814 252 3356 0814 252 3356

5605 007 1027 5605 007 1028 5605 007 1029 5605 007 1030

29 Maintenance and Care

The following maintenance intervals apply for normal operat‐ ing conditions only. When working under difficult conditions (high accumulation of dust, highly resinous lumber, lumber from tropical trees, etc.) or longer than normal each day, the specified intervals must be shortened accordingly. If you only

use the tool occasionally, extend the intervals accordingly.

Weekly

Before starting work

Whenever tank is refilled

Monthly

If faulty

Annually

If damaged

As required

Complete machine Visual inspection (condition,

X X

leaks) Clean X

At the end of work and/or daily

Throttle trigger, throttle trigger

Function test X X lockout, choke lever, stop switch, master control lever (dependent on equipment)

Chain brake Function test X X

Have checked by dealer

Manual fuel pump (if present) check X

Fuel pick-up body / filter in fuel tank

Have repaired by a specialist

dealer

check X

Clean, replace filter insert X X

replace X X X Fuel tank Clean X Lubricating oil tank Clean X

STIHL recommends STIHL servicing dealer

When using professional chainsaws (with a power output of 3.4 kW or more) for the first time,

tighten the cylinder block screws after 10 to 20 hours of operation

38 0458-209-0121-B

Page 39

29 Maintenance and Care English

use the tool occasionally, extend the intervals accordingly.

Weekly

Monthly

If faulty

Annually

If damaged

Before starting work

Whenever tank is refilled

As required

Chain lubrication check X

At the end of work and/or daily

Saw chain Check, pay attention to

X X

sharpness

Checking the chain tension X X

sharpen X Guide bar Check (wear, damage) X

Clean and turn over X

Deburr X

replace X X Chain sprocket check X Air filter Clean X X

replace X Anti-vibration elements check X X

Have replaced by servicing

dealer

Air intake on fan housing Clean X X X Cylinder fins Clean X X X Carburetor Check idle adjustment – saw

X X

chain must not rotate

Set the idle speed; if required

have the chainsaw repaired

by a specialist dealer

Spark plug Adjust electrode gap X

Replace after 100 hours of

operation Accessible screws and nuts

(except adjusting screws)

Tighten

Chain catcher check X

replace X Safety information label replace X

STIHL recommends STIHL servicing dealer

When using professional chainsaws (with a power output of 3.4 kW or more) for the first time,

tighten the cylinder block screws after 10 to 20 hours of operation

0458-209-0121-B 39

Page 40

209BA023 KN

English

30 Minimize Wear and Avoid

Damage

Observing the instructions in this manual helps reduce the risk of unnecessary wear and dam‐ age to the power tool.

The power tool must be operated, maintained and stored with the due care and attention described in this owner's manual.

The user is responsible for all damage caused by non-observance of the safety precautions, oper‐ ating and maintenance instructions in this man‐ ual. This includes in particular:

Alterations or modifications to the product not

–

approved by STIHL. Using tools or accessories which are neither

–

30.2 Parts Subject to Wear and Tear

Some parts of the power tool are subject to nor‐ mal wear and tear even during regular operation in accordance with instructions and, depending on the type and duration of use, have to be replaced in good time. Among other parts, this includes:

Saw chain, guide bar

–

Drive components (clutch, clutch drum, chain

–

sprocket) Filters (air, oil, fuel)

–

Starter mechanism

–

Spark plug

–

Components of antivibration system

–

31 Main Parts

30 Minimize Wear and Avoid Damage

approved or suitable for the product or are of a poor quality. Using the product for purposes for which it

–

was not designed. Using the product for sports or competitive

–

events. Consequential damage caused by continuing

–

to use the product with defective components.

30.1 Maintenance Work

All the operations described in the "Maintenance Chart" must be performed on a regular basis. If these maintenance operations cannot be per‐ formed by the owner, they should be performed by a servicing dealer.

STIHL recommends that you have servicing and repair work carried out exclusively by an author‐ ized STIHL servicing dealer. STIHL dealers are regularly given the opportunity to attend training courses and are supplied with the necessary technical information.

If these maintenance operations are not carried out as specified, the user assumes responsibility for any damage that may occur. Among other parts, this includes:

Damage to the engine due to neglect or defi‐

–

cient maintenance (e.g. air and fuel filters), incorrect carburetor adjustment or inadequate cleaning of cooling air inlets (intake ports, cyl‐ inder fins). Corrosion and other consequential damage

–

resulting from improper storage. Damage to the machine resulting from the use

–

of poor quality replacement parts.

40 0458-209-0121-B

1 Carburetor Box Cover Twist Lock

2 Carburetor adjusting screws

3 Spark plug boot

4 Chain sprocket cover

5 Chain sprocket

6 Chain brake

7 Chain tensioner

8 Chain catcher

9 Bumper spike

10 Guide bar

11 Oilomatic saw chain

12 Oil filler cap

Page 41

32 Specifications English

13 Muffler

14 Front hand guard

15 Front handle (handlebar)

16 Decompression valve (depending on equip‐

ment version)

17 Starter grip

18 Master Control lever

19 Fuel tank twist lock

20 Throttle trigger

21 Throttle lock

22 Rear handle

23 Rear hand guard

# Serial number

32 Specifications

32.1 Engine

STIHL single cylinder two-stroke engine

32.1.1 MS 290

Displacement: Cylinder bore: 46 mm

Piston stroke: 34 mm Engine power according to ISO 7293:

Idle speed:

32.1.2 MS 310

Displacement: Cylinder bore: 47 mm

Piston stroke: 34 mm Engine power according to ISO 7293:

Idle speed:

32.1.3 MS 390

Displacement: Cylinder bore: 49 mm

Piston stroke: 34 mm Engine power according to ISO 7293:

Idle speed:

32.2 Ignition system

Electronic magneto ignition

Spark plug (suppressed): Bosch WSR 6 F,

Electrode gap: 0.5 mm

56.5 cm

3.0 kW (4.1 HP) at 9500 rpm 2800 rpm

59.0 cm

3.2 kW (4.4 HP) at 9500 rpm 2800 rpm

64.1 cm

3.4 kW (4.1 HP) at 9500 rpm 2800 rpm

NGK BPMR 7 A

32.3 Fuel system

All position diaphragm carburetor with integral fuel pump

Fuel tank capacity:

560 cm3 (0.56 l)

32.4 Chain lubrication

Fully automatic, speed-controlled oil pump with reciprocating piston – additional manual oil flow control

Oil tank capacity:

330 cm3 (0.33 l)

32.5 Weight

Dry, without cutting attachment MS 290: 5.9 kg MS 310: 5.9 kg MS 390: 5.9 kg

32.6 Cutting attachment

Actual cutting length may be less than the speci‐ fied length

32.6.1 Rollomatic guide bars

Bar lengths (pitch .325"): 32, 37, 40, 45, 50 cm Cutting length 3/8" pitch): 32, 37, 40, 45, 50,

Groove width: 1.6 mm

32.6.2 Saw chains .325"

Rapid Micro 3 (26 RM3) Type 3634 Rapid Micro (26 RM) Type 3629 Rapid Super (26 RS) Type 3639 Pitch: 0.325" (8.25 mm) Drive link gauge: 1.6 mm

32.6.3 Saw chains 3/8"

Rapid Micro (36 RM) Type 3652 Rapid Super (36 RS) Type 3621 Rapid Super 3 (36 RS3) Type 3626 Pitch: 3/8" (9.32 mm) Drive link gauge: 1.6 mm

32.6.4 Chain sprockets

7-tooth for 3/8" (spur chain sprocket) Max. chain speed to ISO 11681:

Chain speed at maximum power output: 7-tooth for 3/8" (rim sprocket) Max. chain speed to ISO 11681:

Chain speed at maximum power output: 7-tooth for .325“ (spur chain sprocket) Max. chain speed to ISO 11681:

Chain speed at maximum power output: 7-tooth for 0.325" (rim sprocket) Max. chain speed to ISO 11681:

63 cm

27.5 m/s

21.7 m/s

27.5 m/s

21.7 m/s

27.5 m/s

21.7 m/s

27.8 m/s

to ISO 11681 +/- 50 rpm

0458-209-0121-B 41

Page 42

English 33 Ordering Spare Parts

Chain speed at maximum power output:

22.0 m/s

32.7 Noise and Vibration Data

For further details on compliance with Vibration Directive 2002/44/EC see www.stihl.com/vib.

32.7.1 Sound pressure level L ISO 22868

MS 290: 102 dB(A) MS 310: 102 dB(A) MS 390: 102 dB(A)

32.7.2

MS 290: 116 dB(A) MS 310: 115 dB(A) MS 390: 116 dB(A)

32.7.3 Vibration measurement a

Handle, left Handle,

MS 290: MS 310: MS 390:

The K‑factor in accordance with Directive 2006/42/EC is 2.0 dB(A) for the sound pressure level and sound power level; the K‑factor in accordance with Directive 2006/42/EC is

2.0 m/s2 for the vibration level.

Sound power level Lw to ISO 22868

ISO 22867

4.6 m/s

4.3 m/s

5.9 m/s

peq

hv,eq

right

5.7 m/s

4.7 m/s

5.1 m/s

32.8 REACH

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

For information on compliance with the REACH regulation (EC) No. 1907/2006 see

www.stihl.com/reach

32.9 Exhaust Emissions

The CO2 value measured in the EU type appro‐ val procedure is specified at

www.stihl.com/co2

in the product-specific technical data.

The measured CO2 value 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 User Manual. The oper‐ ating license shall be void if the engine is modi‐ fied in any way.

33 Ordering Spare Parts

Please enter your saw model, serial number as well as the part numbers of the guide bar and saw chain in the spaces provided. This will make re-ordering simpler.

The guide bar and saw chain are subject to nor‐ mal wear and tear. When purchasing these parts, always quote the saw model, the part numbers and names of the parts.

Model

Serial number

Guide bar part number

Chain part number

34 Maintenance and Repairs

Users of this machine may only carry out the maintenance and service work described in this user manual. All other repairs must be carried out by a servicing dealer.

When repairing the machine, only use replace‐ ment parts which have been approved by STIHL for this power tool or are technically identical. Only use high-quality replacement parts in order to avoid the risk of accidents and damage to the machine.

STIHL recommends the use of original STIHL replacement parts.

Original STIHL parts can be identified by the STIHL part number, the { logo and the STIHL parts symbol K (the symbol may appear alone on small parts).

35 Disposal

Observe all country-specific waste disposal rules and regulations.

42 0458-209-0121-B

Page 43

000BA073 KN

36 EC Declaration of Conformity English

Guaranteed sound power level

MS 290: 117 dB(A) MS 310: 116 dB(A) MS 390: 117 dB(A)

The EC type examination was carried out by

DPLF Deutsche Prüf- und Zertifizierungsstelle für Landund Forsttechnik GbR (NB 0363) Spremberger Straße 1 D‑64823 Groß-Umstadt

STIHL products must not be thrown in the gar‐ bage can. Take the product, accessories and packaging to an approved disposal site for envi‐ ronment-friendly recycling.

Contact your STIHL servicing dealer for the lat‐ est information on waste disposal.

Certification No. MS 290: K-EG- 2009/3142 MS 310: K-EG- 2009/3091 MS 390: K-EG- 2009/3143

Technical documents deposited at:

ANDREAS STIHL AG & Co. KG Produktzulassung

36 EC Declaration of Con‐

formity

ANDREAS STIHL AG & Co. KG Badstr. 115 D‑71336 Waiblingen

Germany

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

Done at Waiblingen, 03.02.2020

ANDREAS STIHL AG & Co. KG

declares under our sole responsibility that

Designation: Chainsaw Make: STIHL Series: MS 290

MS 310

MS 390 Serial identification number: 1127 Displacement MS 290:

MS 310: MS 390:

56.5 cm

59.0 cm

64.1 cm

Dr. Jürgen Hoffmann

Director Product Certification & Regulatory Affairs

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, EN 61000‑6‑1

The measured and the guaranteed sound power level have been determined in accordance with Directive 2000/14/EC, Annex V, and standard ISO 9207.

Measured sound power level

MS 290: 116 dB(A) MS 310: 115 dB(A) MS 390: 116 dB(A)

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Stihl MS 290, MS 310, MS 390 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Guide to Using this Manual

1.1 Pictograms

2 Safety Precautions English

1.2 Symbols in text

1.3 Engineering improvements

2.1 General

2.2 Intended use

2.3 Clothing and Equipment

2.4 Transporting

2.5 Cleaning

2.6 Accessories

2.7 Refuelling

2.8 Before Starting Work

2.9 Starting the chain saw

2.10 During operation

2.11 After finishing work

2.12 Storage

2.13 Vibrations

2.14 Maintenance and repairs

3 Reactive Forces English

3.1 Dangers of kickback

3.2 Kickback occurs if, e. g.,

English 4 Working Techniques

3.3 Quickstop chain brake:

3.6 Pushback (B)

3.4 To reduce the risk of kickback

3.5 Pull-in (A)

3.7 Exercise extreme caution

4.1 Sawing

4.2 Preparing for felling

4.3 Felling notch

4.4 Sapwood cuts

4.5 Basic information on felling cut

4.6 Selecting the appropriate felling cut

4.7 Felling cut with stabilizing strap (normal tree)

4.8 Felling Cut with Holding Strap (Leaner)

5 Cutting Attachment English

5.1 Chain Scabbard

English 6 Mounting the Bar and Chain

6.3 Fitting the chain

6.1 Removing the chain sprocket cover

6.2 Disengaging the chain brake.

7 Tensioning the Chain

8 Checking Chain Tension English

9 Fuel

9.1 STIHL MotoMix

9.2 Mixing fuel

English 10 Fueling

9.3 Storing fuel mixture

10.3 Filler cap without marking

10.1 Preparing the machine

10.2 Different markings on filler caps

10.4 Filler cap with marking

English 11 Chain Lubricant

12.2 Fill up with chain oil.

12 Filling Chain Oil Tank

12.1 Preparations

14 Chain Brake English

14.1 Saw chain, lock

14.2 Disengage the chain brake.

14.4 Chain Brake Maintenance

15 Winter Operation

15.1 At temperatures below +10 °C

15.2 At temperatures above +20 °C

16 Information Before You Start English

17.1 Starting the engine

16.2 Adjust Master Control lever

English 18 Operating Instructions

17.4 If the engine does not start

18.1 During the break-in period

17.2 Switching off the engine

18.2 During work

19 Oil Quantity Control English

18.3 After finishing work

English 21 Air Filter System

21.1 Fabric filter