Stihl STIHL MS 171, 181, 211 STIHL MS 171, 181, 211 (en / fr) [en, fr]

STIHL MS 171, 181, 211

Instruction Manual Notice d’emploi

G Instruction Manual

1 - 57

F Notice d’emploi

58 - 119

Contents

English

Guide to Using this Manual 2 Safety Precautions 3 Reactive Forces 8 Working Techniques 9 Cutting Attachment 18 Mounting the Bar and Chain (side

chain tensioner) 18 Mounting the Bar and Chain (quick

chain tensioner) 19

Original Instruction ManualPrinted on chlorine-free paper

Tensioning the Saw Chain (side chain tensioner) 21

Tensioning the Saw Chain (quick chain tensioner) 22

Checking Chain Tension 22 Fuel 22 Fueling 23 Chain Lubricant 27 Filling Chain Oil Tank 27 Checking Chain Lubrication 28 Chain Brake 28 Winter Operation 29 Starting / Stopping the Engine 30

Printing inks contain vegetable oils, paper can be recycled.

Operating Instructions 34 Taking Care of the Guide Bar 35 Shroud 36 Air Filter System 36 Cleaning the Air Filter 37 Engine Management 37 Adjusting the Carburetor 37 Spark Arresting Screen in Muffler 38 Spark Plug 39 Engine Running Behavior 40

Storing the Machine 40 Checking and Replacing the Chain

Sprocket 40 Maintaining and Sharpening the

Saw Chain 41 Maintenance and Care 45 Main Parts 47 Specifications 49 Ordering Spare Parts 50 Maintenance and Repairs 51 Disposal 51 Important Safety Instructions 51 Key to Symbols 53 STIHL Limited Emission Control

Warranty Statement 54 CSA Standard 56

Dear Customer, Thank you for choosing a quality

engineered STIHL product. It has been built using modern

production techniques and comprehensive quality assurance. Every effort has been made to ensure your satisfaction 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

0458-533-8221-D. VA3.J20.

0000001154_017_GB

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

Guide to Using this Manual

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

Pictograms

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

Depending on the machine and equipment version, 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

Intake air baffle: winter operation

Intake air baffle: summer operation

Handle heating

Actuate decompression valve

Actuate manual fuel pump

Symbols in text

WARNING

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

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 manual.

Direction of chain travel

Ematic; chain oil flow adjustment

Tension saw chain

NOTICE

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

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

Safety Precautions

Special safety precautions must be observed to reduce the risk of personal 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. Nonobservance of the instruction manual may result in serious or even fatal injury.

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 animals 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 system of your chain saw produces an electromagnetic 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.

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 damage to property caused while using unauthorised attachments.

Clothing and Equipment

Wear proper protective clothing and equipment.

Clothing must be sturdy and snug-fitting, but allow complete freedom of movement. Wear snug fitting clothing with cutretardant pads – no loose-fitting 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 cut-retardant material, non-slip soles and steel toe caps.

WARNING

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

Wear "personal" hearing protection – for example, ear defenders.

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

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA115 KN

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

STIHL can supply a comprehensive range of personal protective equipment.

Transport

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. Avoid touching hot parts of the machine, especially the surface of the muffler – risk of burns!

In vehicles: Properly secure the machine to prevent tipping, damage and chain oil or fuel spillage.

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.

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.

Refuelling

Gasoline is an extremely flammable fuel – keep clear of naked flames and fire – do not spill any fuel

– no smoking. 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 ventilated place. Clean the machine immediately if fuel is spilled. Do not spill fuel over your clothing – contaminated clothing must be changed immediately.

The machines can be equipped with the following filler caps as standard:

Cliplock filler cap (bayonet-type)

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

This helps reduce the risk of unit vibrations causing 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!

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 special attention to visible parts such as the tank cap, hose connections and the manual fuel pump (on machines so equipped). If

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA087 LÄ

there are any leaks or damage, do not start the engine – risk of fire. Have your saw repaired by a servicing 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.

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 starting – risk of injury due to rotating chain!

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

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 emergency, switch off the engine immediately by moving 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 procedures and can provide help in an emergency. Helpers at the cutting site must also wear protective 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 produced while using the machine may be hazardous 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.

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

Examine the saw chain periodically at short intervals 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 unintentionally!

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 colourless and odour-

less 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 catalytic 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 problems (e. g., your field of vision gets smaller), hearing problems, dizziness or inability to concentrate, stop work immediately. Such symptoms may be caused by an excessively high concentration of exhaust emissions – risk of accident!

After finishing work

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

Storage

When the machine is not in use, it should be stored in such a way that noone is endangered. Secure the machine against unauthorised use.

Store the machine in a safe, dry room.

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 circulation (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.

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

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 inadvertently!

Exception: adjustment of carburettor and idle speed.

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 accidents!

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 "Specifications".

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

Check that the muffler is in perfect working condition.

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 influences 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 lubricated.

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! Consult a

servicing dealer – do not use the machine until the malfunction has been remedied, see "Chain brake".

Maintenance, replacement, or repair of the emission control devices and systems may be performed by any nonroad engine repair establishment or individual. However, if you make a warranty claim for a component which has not been serviced or maintained properly, STIHL may deny coverage.

For any maintenance please refer to the maintenance chart and to the warranty statement near the end of the instruction manual.

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA036 KN

001BA257 KN

001BA037 KN

Reactive Forces

The most common reactive forces are: kickback, pushback and pull-in.

Dangers of kickback

Kickback can result in fatal cuts.

Kickback occurs if, for example,

– The saw chain in the area of the

upper quarter of the guide bar nose unintentionally comes into contact with wood or a solid object – e. g., unintentionally touches another limb during limbing

– The saw chain at the nose of the

guide bar is briefly pinched in the cut

QuickStop chain brake:

This device reduces the risk of injury in certain situations – it cannot prevent kickback. If activated, the brake stops the saw chain within a fraction of a second – refer to chapter "Chain brake" in this Instruction Manual.

– Be especially careful with small,

tough limbs, undergrowth and

offshoots – the saw chain may

become caught in them

– Never cut several limbs at once – Do not lean too far forward – Do not cut above shoulder height – Use extreme caution when re-

entering a previous cut – Do not attempt plunge cuts if you

are not experienced 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, properly tensioned saw

chain – the depth gauge setting

must not be too large – Use low-kickback saw chains as

well as narrow-radius guide bars

Pull-in (A)

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

Reducing the risk of kickback

– Work cautiously and methodically – Hold the chain saw firmly with both

hands and maintain a secure grip

– Always cut at full throttle – Be awar e of the loc ation of the guide

bar nose

– Do not cut with the guide bar nose

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

When the chain on the bottom of the bar – overbucking – is suddenly pinched, caught or encounters a foreign object in the wood, the chain saw may suddenly

English

001BA038 KN

be drawn forward toward the log – to avoid this, engage the bumper spike firmly in the wood.

Pushback (B)

When the chain on the top of the bar – underbucking – is suddenly pinched, caught or encounters a foreign object in the wood, the chain saw may suddenly be driven straight back toward the operator – to avoid this:

– Do not allow the top of the guide bar

to become jammed

– Do not twist the guide bar in the cut

Be very careful

– With freely hanging limbs – With trunks that are under tension

between other trees because they

fell unfavourably – When working in windbreaks In these cases, do not use a chain saw –

use a hoist, winch or dragline instead. Pull out trunks that are lying about and

have been cut free. Whenever possible, deal with them in open areas.

Dead wood (brittle, rotten or dead wood) poses a significant, highly unpredictable hazard. It is extremely difficult or even practically impossible to recognise the danger. Use aids such as winches or draglines.

When felling close to roads, rail lines, power lines, etc., work with particular care. If necessary, notify police, power companies or railway authorities.

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

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

Cutting

Do not operate your saw with the starting throttle lock engaged. Engine speed cannot be controlled 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.

First-time users are advised to practice cutting logs on a sawhorse – see "When cutting small logs".

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

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA082 KN

001BA033 KN

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. Take care when cutting scrub and young

trees. The saw chain may catch and throw thin shoots in your direction.

To reduce the risk of injury, take special care when cutting shattered wood because of the risk of injury from slivers being caught and thrown in your direction.

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

If the rotating chain makes contact with a rock or other solid object there is a risk of sparking which may cause easily combustible material to catch fire under certain circumstances. Dry plants and scrub are also easily combustible, especially in hot and dry weather conditions. If there is a risk of fire, do not use your chainsaw near combustible

materials, dry plants or scrub. Always contact your local forest authority for information on a possible fire risk.

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 work on a ladder or in a tree – Never work on an insecure support – Do not work above shoulder height – Never operate your power tool with

one hand

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

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

Note when reaching the end of a cut that the saw is no longer supported in the kerf. You have to take the full weight of the machine since it might otherwise go out of control.

When cutting small logs: – 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 possible.

– 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 cuts in the correct

sequence (first at the compression side (1), then at the tension side (2), the saw may otherwise pinch or kick back – risk of injury.

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

N Make relieving cut at the

001BA151 KN

001BA152 KN

001BA189 KN

001BA088 LÄ

1 1

compression side (1)

N 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 touching the ground because the saw chain will otherwise be damaged.

Ripping cut:

Cutting technique in which the spiked bumper is not used – risk of pull-in – start the cut with the guide bar at the shallowest possible angle – take extra care since there is an increased danger of kickback.

Preparing for felling

Check that there are no other persons in the felling area – other than helpers.

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

English

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)

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA040 KN

45°

001BA146 KN

001BA271 KN

A Direction of fall B Escape path (escape routes)

– Establish escape paths for each

worker – approx. 45° diagonally opposite to the direction of fall

– Clear escape paths, eliminate

obstacles

– Put down tools and equipment at a

safe distance – but not on the escape paths

– When felling, stand only to the side

of the falling 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

– Remove largest buttresses: first the

largest buttress – saw first vertically, then horizontally – only if the tree is in sound condition

Felling notch

Preparing the felling notch

The felling notch (C) determines the direction of 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

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA153 KN

001BA150 KN

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

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 direction 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 technique.

N Make a bottom (horizontal) cut N Make the top (angled) cut

approx. 45°- 60° to the bottom cut

Checking the direction of fall

N In sert th e chainsaw with gu ide bar in

the bottom 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.

Sapwood cuts

Sapwood cuts in long-fibered softwood help prevent 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.

Basic information on felling cut

Basic dimensions

1/10

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 diameter – 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

001BA259 KN

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA269 KN

001BA270 KN

001BA260 KN

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) supports 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

– With rotten trunks, leave a wider

strip

Plunge cutting

– For relieving cuts during shortening – For wood carving

N 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 pushback!

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

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 damage the saw chain and cause dangerous kickback.

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

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

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 variants:

left: Normal tree – vertically

upright tree with uniform crown

right: Leaner tree - crown pointing in

direction of fall

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA261 KN

001BA273 KN

001BA263 KN

Felling cut with stabilizing strap (normal tree)

A) Thin trunks Implement this felling cut when the trunk

diameter is smaller than the cutting length of the chainsaw.

Shout a warning before starting the felling cut.

N Plunge cut the felling cut (E) –

plunge the guide bar fully in

N Engage the spiked bumper behind

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

N Make the felling cut up to the

hinge (1)

– Do not cut into the hinge N Make the felling cut up to the

stabilizing strap (2)

– Do not cut into the stabilizing strap

N Set the felling wedge (3) Shout a second warning immediately

before the tree falls. N Cut through the stabilizing strap,

horizontal level with the felling cut, with arms fully extended

B) Thick trunks Implement this felling cut when the trunk

diameter is greater than the cutting length of the machine.

Shout a warning before starting the felling cut.

N Engage the spiked bumper at the

height of the felling cut and use this as the rotation point – reposition the chainsaw as little as possible

N Tip of the guide bar must penetrate

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

N Make the felling cut up to the

hinge (2)

– Do not cut into the hinge N 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

opposite side of the trunk. Ensure that the second cut is at the

same level as the first cut.

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA274 KN

001BA265 KN

001BA266 KN

N Plunge cut the felling cut N Make the felling cut up to the

hinge (4)

– Do not cut into the hinge N Make the felling cut up to the

stabilizing strap (5)

– Do not cut into the stabilizing strap

N Set the felling wedge (6) Shout a second warning immediately

before the tree falls. N Cut through the stabilizing strap,

horizontal level with the felling cut, with arms fully extended

Felling Cut with Holding Strap (Leaner)

A) Thin trunks Implement this felling cut when the trunk

diameter is smaller than the cutting length of the chainsaw.

N Plunge cut the guide bar into the

trunk until it exits on the other side

N Make the felling cut (E) towards the

hinge (1)

– Cut horizontally – Do not cut into the hinge

N Make the felling cut towards the

holding strap (2)

– Cut horizontally – Do not cut into the holding strap.

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

Shout a second warning immediately before the tree falls.

N With outstretched arms, cut through

the holding strap at a downward

angle from outside.

English

001BA267 KN

001BA268 KN

B) Thick trunks

The felling cut must be continued on the opposite side of the trunk.

Ensure that the second cut is at the same level as the first cut.

N Engage the spiked bumper behind

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

N Tip of the guide bar must penetrate

the wood before the holding strap (4) – guide the chainsaw absolutely horizontally and swivel as widely as possible

N Make the felling cut up to the

hinge (5)

– Do not cut into the hinge N Make the felling cut up to the

holding strap (6)

Perform this felling cut when the tree

– Do not cut into the holding strap.

diameter is greater than the cutting length of the chainsaw.

N Engage the spiked bumper behind

the holding strap and use it as a pivot – avoid repositioning the chainsaw more than necessary.

N The guide bar nose enters the

wood (1) before it reaches the hinge – hold the chainsaw horizontally and swing it as far as possible.

– Do not cut into the holding strap or

hinge.

N Make the felling cut up to the

hinge (2)

– Do not cut into the hinge N Make the felling cut up to the

holding strap (3)

– Do not cut into the holding strap.

Shout a second warning immediately before the tree falls.

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

N With outstretched arms, cut through

the holding strap at a downward

angle from outside.

English

001BA248 KN

001BA244 KN

533BA001 KN

001BA185 KN

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.

– The pitch (t) of the saw chain (1),

chain sprocket and the nose sprocket of the Rollomatic 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 cutting attachment may be damaged beyond repair after a short period of operation.

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 correct length which covers the complete guide bar.

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

Mounting the Bar and Chain (side chain tensioner)

Removing the chain sprocket cover

N Unscrew the nut and remove the

chain sprocket cover.

N Turn the screw (1)

counterclockwise until the tensioner

slide (2) butts against the left end of

the housing slot.

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA186 KN

143BA003 KN

001BA187 KN

2310BA013 KN

2310BA014 KN

Disengage the chain brake.

N Pull the hand guard towards the

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

Fitting the chain

N Fit the guide bar over the studs (1) –

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

N Engage the peg of the tensioner

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

N 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.

N Refit the sprocket cover and screw

on the nut only fingertight.

N Go to chapter on "Tensioning the

Saw Chain"

Mounting the Bar and Chain (quick chain tensioner)

Removing the chain sprocket cover

N Swing grip (1) into position (until it

engages) N Turn the wing nut (2) to the left until

it hangs loosely in the chain

sprocket cover (3) N Remove chain sprocket cover (3)

Mounting the tensioning gear

WARNING

Wear work gloves to protect your hands from the sharp cutters.

N Fit the chain – start at the bar nose.

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

N Remove and reverse tensioning

gear (1)

English

2310BA015 KN

2310BA016 KN

2310BA017 KN

001BA186 KN

181BA012 KN

181BA013 KN

N Remove screw (2)

N Position tensioning gear (1) and

guide bar (3) relative to one another

Releasing the chain brake

N Pull hand guard towards the front

handle until it engages audibly – chain brake is released

Fitting the saw chain

N Fit the saw chain – starting at the

nose of the guide bar – pay attention

to the position of the tensioning gear

and the cutting edges N Turn tensioning gear (1) to the right

as far as possible N Turn the guide bar so that the

tensioning gear faces the user

N Place the saw chain on the chain

sprocket (2) N Slide the guide bar over the collar

screw (3); the head of the rear collar

screw must protrude into the oblong

hole

N Insert and tighten screw (2)

WARNING

Put on protective gloves – risk of injury by the sharp cutters.

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

135BA011 KN

2310BA018 KN

142BA063 KN

N Guide the drive link into the bar

groove (see arrow) and turn the tensioning gear to the left as far as possible

N Fit chain sprocket cover, sliding the

guide lugs into the engine housing openings

N turn the adjusting wheel (4) a little

until the chain sprocket cover can be slid completely against the engine housing

N Swing grip (5) into position (until it

engages)

N Fit wing nut and tighten lightly N Next step: see "Tensioning the Saw

Chain"

Tensioning the Saw Chain (side chain tensioner)

Retensioning during cutting work:

N Switch off the engine. N Loosen the nut. N Hold the bar nose up. N Use a screwdriver to turn the

tensioning screw (1) clockwise until

the chain fits snugly against the

underside of the bar. N While still holding the bar nose up,

tighten down the nut firmly. N Go to "Checking Chain Tension". A new chain has to be retensioned more

often than one that has been in use for some time.

N Check chain tension frequently –

see chapter on "Operating

Instructions".

When fitting the chain sprocket cover, the teeth of the adjusting wheel and the tensioning gear must mesh; if necessary,

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA112 KN

142BA064 KN

Tensioning the Saw Chain (quick chain tensioner)

Retensioning during cutting work:

N Shut off the engine. N Pull out the hinged clip and loosen

the wingnut.

N Turn the adjusting wheel (1)

clockwise as far as stop.

N Tighten down the wingnut (2) firmly

by hand.

N Fold down the hinged clip. N Go to "Checking Chain Tension"

A new chain has to be retensioned more often than one that has been in use for some time.

N Check chain tension frequently –

see chapter on "Operating Instructions".

Checking Chain Tension

N Shut off the engine. N Wear work gloves to protect your

hands.

N The chain must fit snugly against

the underside of the bar and it must still be possible to pull the chain along the bar by hand when the chain brake is released.

N If necessary, retension the chain. A new chain has to be retensioned more

often than one that has been in use for some time.

N Check chain tension frequently –

see chapter on "Operating Instructions".

Fuel

This engine is certified to operate on unleaded gasoline and with the mix ratio 50:1.

Your engine requires a mixture of highquality premium gasoline and highquality two-stroke air-cooled engine oil.

Use premium branded unleaded gasoline with a minimum octane rating of 89 (R+M)/2.

Note: Models equipped with a catalytic converter require unleaded gasoline. A few tankfuls of leaded gasoline can reduce the efficiency of the catalytic converter by more than 50%.

Fuel with a lower octane rating may result in preignition (causing "pinging") which is accompanied by an increase in engine temperature. This, in turn, increases the risk of the piston seizure and damage to the engine.

The chemical composition of the fuel is also important. Some fuel additives not only detrimentally affect elastomers (carburetor diaphragms, oil seals, fuel lines etc.), but magnesium castings as well. This could cause running problems or even damage the engine. For this reason it is essential that you use only high-quality fuels!

Fuels with different percentages of ethanol are being offered. Ethanol can affect the running behaviour of the engine and increase the risk of lean seizure.

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA229 KN

Gasoline with an ethanol content of more than 10% can cause running problems and major damage in engines with a manually adjustable carburetor and should not be used in such engines.

Engines equipped with M-Tronic can be run on gasoline with an ethanol content of up to 25% (E25).

Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke aircooled engine oils for mixing.

We recommend STIHL 50:1 two-stroke engine oil since it is specially formulated for use in STIHL engines.

To ensure the maximum performance of your STIHL engine, use a high quality 2cycle engine oil. To help your engine run cleaner and reduce harmful carbon deposits, STIHL recommends using STIHL HP Ultra 2-cycle engine oil or ask your dealer for an equivalent fully synthetic 2-cycle engine oil.

To meet the requirements of EPA and CARB we recommend to use STIHL HP Ultra oil.

Do not use BIA or TCW (two-stroke water cooled) mix oils!

Use only STIHL 50:1 heavy-duty engine oil or an equivalent quality two-stroke engine oil for the fuel mix in models equipped with a catalytic converter.

Take care when handling gasoline. Avoid direct contact with the skin and avoid inhaling fuel vapour.

The canister should be kept tightly closed in order to avoid any moisture getting into the mixture.

The fuel tank and the canister in which fuel mix is stored should be cleaned from time to time.

Fuel mix ratio

Only mix sufficient fuel for a few days work, not to exceed 30 days of storage. Store in approved safety fuel-canisters only. When mixing, pour oil into the canister first, and then add gasoline.

Examples Gasoline Oil (STIHL 50:1 or equiva-

lent high-quality oils) 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)

Dispose of empty mixing-oil canisters only at authorized disposal locations.

Fueling

Preparing the machine

N Before fueling, clean the cap and

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

N Always position the machine so that

the cap is facing upwards

Different markings on filler caps

Filler caps and fuel tanks can be marked differently.

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

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA240 KN

001BA218 KN

001BA219 KN

001BA224 KN

001BA220 KN

001BA221 KN

001BA222 KN

001BA223 KN

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

cap and fuel tank

Filler cap without marking

To open:

N Open bracket until it is vertical

N Turn the filler cap counterclockwise

(approx. 1/4 turn)

N Remove the filler cap

Filling with fuel Take care not to spill fuel while fueling

and do not overfill the tank. STIHL recommends using the STIHL

filling system for fuel (special accessory).

N Fill with fuel

Closing

Bracket is in an upright position: N Position filler cap – position

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

N Push the filler cap down as far as it

will go

N Hold the filler cap down and turn it

clockwise until it engages

N Fold down the bracket as far as it

will go

Checking the lock

– The lug on the bracket must engage

entirely in the recess (arrow)

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA225 KN

001BA227 KN

001BA226 KN

001BA236 KN

001BA232 KN

001BA234 KN

001BA237 KN

N Grip the filler cap – if the filler cap

cannot be moved or removed, then it is closed properly

If the filler cap can be moved or removed The base of the filler cap is twisted in

relation to the upper part.

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

positioned

N Fit filler cap and turn it

counterclockwise until it engages in the seat of the filling port

N Continue to turn the filler cap

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

N Turn the filler cap clockwise and

close it – see the section "Closing" and "Checking the lock"

Filler cap with marking

To open:

N Open bracket

N Turn filler cap (approx. 1/4 turn)

Markings on filler cap and fuel tank must align

N Remove the filler cap

Filling with fuel Take care not to spill fuel while fueling

and do not overfill the tank. STIHL recommends using the STIHL

filling system for fuel (special accessory).

N Fill with fuel

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA234 KN

001BA233 KN

001BA231 KN

001BA235 KN

001BA241 KN

001BA238 KN

001BA239 KN

Closing

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

cap and fuel tank must align

N Push the filler cap down as far as it

will go

N Hold the filler cap down and turn it

clockwise until it engages

N Close bracket lock

Filler cap is locked

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.

N 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 exterior marking

right: Base of filler cap is in the cor-

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

N Fit filler cap and turn it

counterclockwise until it engages in the seat of the filling port

N Continue to turn the filler cap

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

N Turn the filler cap clockwise and

close it – see section "Closing"

Then the markings on filler cap and fuel tank will align

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

001BA158 KN

Chain Lubricant Filling Chain Oil Tank

For automatic and reliable lubrication of the chain and guide bar – use only an environmentally compatible quality chain and bar lubricant. Rapidly biodegradable STIHL BioPlus is recommended.

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 formulated chain lubricant.

WARNING

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

NOTICE

Waste oil does not have the necessary lubricating properties and is unsuitable for chain lubrication.

Preparations

N Thoroughly clean the oil filler cap

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

N Position the machine so that the

filler cap is facing up.

N Open the filler cap.

Fill up with chain oil.

N 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 nozzle for chain oil (special accessory).

N 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, contact your dealer for assistance if necessary STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer.

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

English

143BA024 KN

143BA011 KN

143BA012 KN

Checking Chain Lubrication

The saw chain must always throw off a small amount of oil.

NOTICE

Never operate your saw without chain lubrication. If the chain runs dry, the whole cutting attachment will be irretrievably damaged within a very short time. Always check chain lubrication and the oil level in the tank before starting work.

Every new chain has to be broken in for about 2 to 3 minutes.

After breaking in the chain, check chain tension and adjust if necessary – see "Checking Chain Tension".

Chain Brake

Locking the chain

– in an emergency – when starting – at idling speed

The chain brake is activated by pushing the hand guard toward the bar nose with your left hand – or by inertia in certain kickback situations: The chain is stopped and locked.

Releasing the chain brake

N Pull the hand guard back toward the

front handle,

NOTICE

Always disengage chain brake before accelerating the engine (except when checking its operation) and before starting cutting work.

High revs with the chain brake engaged (chain locked) will quickly damage the powerhead and chain drive (clutch, 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 accelerated toward the bar nose – even if your left hand is not behind the hand guard, e.g. during felling cut.

MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C

+ 94 hidden pages

Stihl STIHL MS 171, 181, 211 STIHL MS 171, 181, 211 (en / fr) [en, fr]

Specifications and Main Features

Frequently Asked Questions

User Manual