STIHL MS 881

2 - 30 Instruction Manual
English

Contents 2 Guide to Using this Manual

0000009211_003_GB
Translation of Original Instruction Manual
1 Introduction................................................. 2
2 Guide to Using this Manual......................... 2
2.1 Symbols used with warnings in
3 Overview..................................................... 3 the text
4 Safety Precautions......................................4
5 Preparing the Saw for Operation.............. 10 WARNING
6 Assembling the Saw................................. 11 ■ This symbol indicates dangers that can cause
7 Engaging and Disengaging the Chain Brake serious injuries or death.
.................................................................. 13 ► The measures indicated can avoid serious
8 Mixing Fuel and Refueling the Chainsaw..13 injuries or death.
9 Starting and Stopping the Engine............. 14
10 Checking the Saw..................................... 16 NOTICE
11 Operating the Saw.................................... 18
12 After Finishing Work..................................23 ■ This symbol indicates dangers that can cause
13 Transporting..............................................23 damage to property.
14 Storing.......................................................24 ► The measures indicated can avoid damage
15 Cleaning....................................................24 to property.
16 Maintenance............................................. 25

Printing inks contain vegetable oils, paper can be recycled.

Printed on chlorine-free paper
17 Repairing...................................................26 2.2 Symbols in Text
18 Troubleshooting........................................ 26 This symbol refers to a chapter in this
19 Specifications............................................28 instruction manual.
20 Bar and Chain Combinations.................... 29
21 Spare Parts and Accessories....................29 3 Overview
22 Disposal.................................................... 30
23 EC Declaration of Conformity................... 30
3.1 Chainsaw

1 Introduction
2
Dear Customer,
Thank you for choosing STIHL. We develop and 3
manufacture our quality products to meet our 1 #
customers’ requirements. The products are
designed for reliability even under extreme con‐ 4
ditions. 8
7
STIHL also stands for premium service quality. 11 6
Our dealers guarantee competent advice and 5
instruction as well as comprehensive service 10 9
29
support.
STIHL expressly commit themselves to a sus‐ 27 28
tainable and responsible handling of natural 30
26
resources. This user manual is intended to help
you use your STIHL product safely and in an
environmentally friendly manner over a long
12
service life. 25
24
We thank you for your confidence in us and hope 13 23
0458-890-8321-B. VA0.A21.
© ANDREAS STIHL AG & Co. KG 2021

you will enjoy working with your STIHL product.

22
14
21
0000-GXX-A370-A0

16
15 17 18
Dr. Nikolas Stihl 19 20

IMPORTANT! READ BEFORE USING AND 1 Carburetor adjusting screws

KEEP IN A SAFE PLACE FOR REFERENCE. For tuning the carburetor.

2 0458-890-8321-B
3 Overview English

2 Front hand guard 20 Rear hand guard

The front hand guard protects the operator's The rear hand guard protects the right hand
left hand from contact with the saw chain and from contact with the saw chain if the chain
is used to engage the chain brake in case of breaks or comes off the bar.
kickback. 21 Control handle
3 Muffler with spark arresting screen The control handle is used to control, hold
Reduces chainsaw noise emissions. and guide the chainsaw.
4 Guide bar 22 Throttle trigger lockout
The guide bar supports and guides the saw Unlocks the throttle trigger.
chain. 23 Air filter
5 Saw chain The air filter filters the air entering the engine.
The saw chain cuts the wood. 24 Spark plug boot
6 Spiked bumper Connects the ignition lead to the spark plug.
Supports the chainsaw against wood while 25 Spark plug
cutting. Ignites the fuel-air mixture in the engine.
7 Tensioning screw 26 Cover
Adjusts the chain tension. Covers the engine.
8 Chain sprocket 27 Decompression valve
The chain sprocket drives the saw chain. Eases the engine starts.
9 Chain catcher 28 Shutter
The chain catcher catches the saw chain if it Serves to select summer or winter operating
breaks or comes off the bar. mode.
10 Chain sprocket cover 29 Filter cover
The chain sprocket cover covers the chain Covers the air filter.
sprocket and fastens the guide bar to the
chain saw. 30 Filter cover lock
Secures the filter cover to the chainsaw.
11 Nuts
Secure the chain sprocket cover to the chain‐ # Serial number
saw.
3.2 Symbols
12 Chain scabbard
The chain scabbard protects from contact Meanings of symbols that may be on the chain‐
with the saw chain. saw:
This symbol marks the fuel tank.
13 Handlebar
The handlebar is used to hold, control and
carry the chainsaw. This symbol marks the chain oil tank.
14 Oil tank cap
The oil tank cap closes the oil tank.
The chain brake is engaged and disen‐
15 Oil pump adjusting screw gaged in this direction.
Serves to adjust the saw chain oil feed rate.
This symbol shows the direction of
16 Starter grip rotation of the chain.
Serves to crank the engine. This symbol marks the oil pump adjust‐
17 Fuel tank cap ing screw and the chain oil feed rate.
Closes the fuel tank. Rotate in this direction to increase chain
18 Master control lever tension.
For starting, running and stopping the engine. Shutter is in winter mode in this position.
19 Throttle trigger
Controls the engine speed. Shutter is in summer mode in this position.

0458-890-8321-B. VA0.A21. 3
English 4 Safety Precautions
This symbol marks the decompression ► Read, understand and save the
valve. instruction manual.

Master Control lever is moved in this direc‐

tion to stop the engine. ► If the chainsaw is passed on to another per‐
Master Control lever is moved in this direc‐ son: Always give them the instruction man‐
tion to stop the engine. ual.
Engine is operated with the Master Control ► Make sure the user meets the following
lever in this position. requirements:
Engine is started with the Master Control – The user must be rested.
lever in this position. – The user must be in good physical condi‐
Engine is made ready for start with the tion and mental health to operate and
Master Control lever in this position. work with the chainsaw. If the user’s
Guaranteed sound power level accord‐ physical, sensory or mental ability is
LWA ing to directive 2000/14/EC in dB(A) in restricted, he or she may work only under
order to make sound emissions of the supervision of or as instructed by a
products comparable. responsible person.
– The user can identify and assess the
4 Safety Precautions dangers of the chainsaw.
– The user must be of legal age or is being
4.1 Warning Signs
trained in a trade under supervision in
Meanings of warning signs on the chainsaw: accordance with national rules and regu‐
Observe safety notices and take the lations.
necessary precautions. – The user has received instruction from a
STIHL servicing dealer or other experi‐
enced user before working with the
Read, understand and save the
instruction manual. chainsaw for the first time.
– The user must not be under the influence
of alcohol, medication or drugs.
Wear safety glasses, hearing protec‐ ► If the user is working with a chainsaw for the
tion and a hard hat. first time: Practice cutting logs on a saw‐
horse or other support.
► If you have any queries: Contact your STIHL
Observe safety notices on kickback servicing dealer for assistance.
and take the necessary precautions. ■ The chainsaw’s ignition system produces an
electromagnetic field. This field may interfere
with some pacemakers. This can result in seri‐
4.2 Intended Use ous or fatal injuries.
► If the user has a pacemaker: Make sure the
The STIHL MS 881 is designed for cutting wood,
pacemaker is not affected.
limbing and felling trees.
4.4 Clothing and Equipment
WARNING
■ Using the chainsaw for purposes for which it is WARNING
not designed may result in serious or fatal inju‐ ■ Long hair can become entangled in the saw
ries and damage to property. during operation. This can result in serious
► Always use the chainsaw as described in this injuries.
User Manual. ► Tie up long hair so that it is above shoulder
level.
4.3 The Operator ■ Objects can be thrown through the air at high
WARNING speed during operation. This can result in per‐
sonal injury.
■ Users without adequate training or instruction
► Wear close-fitting safety glasses.
cannot recognize or assess the risks involved Suitable safety glasses that have
in using the chainsaw. The user or other per‐ been tested and labeled in accord‐
sons may sustain serious or fatal injuries. ance with EN 166 or national stand‐
ards are available from retailers.
4 0458-890-8321-B. VA0.A21.
4 Safety Precautions English
► STIHL recommends that you wear a face can ignite easily flammable materials and
shield. cause a fire.
► Wear a long-sleeved, snug-fitting upper gar‐ ► Keep exhaust gas well away from easily
ment. flammable materials.
■ Noise occurs during operation. Noise can
harm your hearing. 4.6 Safe Condition
► Wear hearing protection. 4.6.1 Chainsaw
The chainsaw is in a safe condition if the follow‐
ing points are observed:
■ Falling objects can cause head injuries. – The chainsaw is not damaged.
► If there is a danger of falling objects – There is no fuel leaking from the chainsaw.
during operation: Wear a safety hard – The fuel tank and oil tank caps are closed.
hat. – The chainsaw is clean.
– The chain catcher is fitted and undamaged.
■ Dust can be whipped up during operation: – The chain brake is operating properly.
Whipped up dust can damage the respiratory – The controls function properly and have not
passages and cause allergic reactions. been modified.
► If dust is whipped up and forms a cloud: – The chain lubrication is operating properly.
Wear a dust respirator mask. – Wear marks on the chain sprocket are not
■ Inappropriate clothing can snag on wood, deeper than 0.5 mm.
brush or the saw. Not wearing suitable cloth‐ – A combination of guide bar and saw chain rec‐
ing may result in serious injury. ommended in this User Manual is mounted.
► Wear snug-fitting clothing. – The guide bar and saw chain are properly
► Do not wear a scarf or jewelry. mounted.
■ The user can come into contact with the rotat‐ – The saw chain is properly tensioned.
ing saw chain during operation. This can result – Only original STIHL accessories designed for
in serious injuries. this chainsaw model are fitted.
► Wear long trousers with cut-retardant inserts. – The accessories are correctly attached.
■ The user can be cut by the wood during oper‐
ation. The user can come into contact with the WARNING
saw chain during cleaning and maintenance ■ If not in safe condition, components may no
work. This can result in personal injury. longer operate correctly, safety devices may
► Wear work gloves made of durable material. be disabled and fuel leakage may occur. This
■ Wearing unsuitable footwear may cause you may result in serous or fatal injury to people.
to slip or stumble. Contact with the rotating ► Work only with an undamaged chainsaw.
saw chain can result in cuts. This can result in ► If fuel is leaking from the chainsaw: Do not
personal injury. use the chainsaw and contact a STIHL
► Wear chainsaw boots with cut retardant dealer for assistance.
inserts. ► Close the fuel tank and oil tank caps.
► If the chainsaw is dirty: Clean the chainsaw.
4.5 Work Area and Surroundings ► Work only with property fitted and undam‐
aged chain catcher.
WARNING ► Never modify your chainsaw. Exception:
■ Bystanders, children and animals are not Mounting a combination of guide bar and
aware of the dangers of the chainsaw or saw chain recommended in this User Man‐
thrown objects. Innocent bystanders, children ual.
and animals may be seriously injured and ► If the controls do not function properly: Do
damage to property may occur. not use your chainsaw.
► Keep bystanders, children and animals away ► Only fit original STIHL accessories designed
from the work area. for this chainsaw model.
► Do not leave the chainsaw unattended. ► Mount the guide bar and saw chain as
► Make sure that children cannot play with the described in this User Manual.
chainsaw. ► Attach accessories as described in this User
■ Hot exhaust gas is emitted through the muffler Manual or in the User Manual for the acces‐
while the engine is running. Hot exhaust gas sories.

0458-890-8321-B. VA0.A21. 5
English 4 Safety Precautions
► Never insert objects in the chainsaw’s open‐ explosion. This can result in serious or fatal
ings. injuries and damage to property.
► Replace worn or damaged labels. ► Protect fuel mixture and gasoline from heat
► If you have any doubts, be sure to consult a and fire.
STIHL dealer. ► Do not spill fuel mixture and gasoline.
► If fuel has been spilled: Wipe up the fuel with
4.6.2 Guide Bar a cloth and do not attempt to start the engine
The guide bar is in a safe condition if the follow‐ until all parts of the saw and the area around
ing points are observed: it are dry.
– Guide bar is not damaged. ► Do not smoke.
– Guide bar is not deformed. ► Never refuel near a fire.
– The minimum groove depth is maintained, ► Shut off the engine and allow it to cool down
19.3. before refueling.
– Bar rails are free from burrs. ► Start the engine at least 3 meters from the
– Bar groove is not pinched or splayed. fueling spot, outdoors only.
WARNING ■ Inhaling fuel fumes and gasoline fumes can
have toxic effects.
■ If the guide bar is not in a safe condition, it can ► Avoid inhaling fuel fumes or gasoline fumes.
no longer support and guide the saw chain ► Refuel in a well-ventilated location.
properly. The rotating saw chain can jump off ■ The chainsaw becomes hot during operation,
the guide bar. This can result in serious or or in a very hot environment. Depending on
fatal injuries. the type of fuel, altitude, ambient temperature
► Work only with an undamaged guide bar. and the temperature of the saw, the fuel
► If the groove depth is less than the minimum expands and can cause a pressure build-up in
depth: Mount a new guide bar. the tank. Fuel may escape as a spray and
► Deburr the guide bar every week. ignite when the fuel tank cap is opened. This
► If you have any queries: Contact your STIHL can result in serious injuries and damage to
servicing dealer. property.
4.6.3 Saw Chain ► Allow the saw to cool down before opening
The saw chain is in a safe condition if the follow‐ the tank cap.
ing points are observed: ► Open the tank cap slowly in stages.
– Chain is not damaged. ■ Clothing that has been in contact with fuel or
– Chain is properly sharpened. gasoline is more easily flammable. This can
– The service marks on the cutters are still visi‐ result in serious or fatal injuries and damage
ble. to property.
► If your clothing comes into contact with fuel
WARNING or gasoline: Change your clothing.
■ If components do not comply with safety ■ Fuel mix, gasoline and two-stroke engine oil
requirements, they will no longer function can harm the environment.
properly and safety devices may be rendered ► Do not spill fuel, gasoline or two-stroke
inoperative. This can result in serious or fatal engine oil.
injuries. ► Dispose of fuel mix, gasoline and two-stroke
► Work only with an undamaged saw chain. engine oil in accordance with local regula‐
► Sharpen the chain properly. tions and environmental requirements.
► If you have any queries: Contact your STIHL ■ Fuel, gasoline or two-stroke engine oil can
servicing dealer for assistance. cause irritation if they come into direct contact
with the skin or eyes.
4.7 Fuel Mixture and Refueling ► Avoid contact with fuel, gasoline and two-
stroke engine oil.
WARNING ► In case of contact with the skin: Wash affec‐
■ This chainsaw requires a fuel mixture of gaso‐ ted areas with plenty of water and soap.
line and two-stroke engine oil. Fuel mixture ► In case of contact with the eyes: Rinse eyes
and gasoline are extremely flammable. If fuel with plenty of water for at least 15 minutes
mixture or gasoline make contact with open and seek medical advice.
fire or hot objects, they can cause a fire or ■ The saw’s ignition system produces sparks.
Unconfined sparks may cause a fire or an

6 0458-890-8321-B. VA0.A21.
4 Safety Precautions English
explosion in an easily combustible or explo‐ ► Operate the chainsaw is a well ventilated
sive environment. This can result in serious or location.
fatal injuries and damage to property. ► In the event of nausea, headache, visual dis‐
► Use the spark plugs described in this instruc‐ turbances, problems with hearing or dizzi‐
tion manual. ness: Stop work and seek medical advice.
► Insert and tighten down the spark plug. ■ The user’s ability to hear and assess noises is
► Connect the spark plug boot and press it restricted when wearing hearing protection
down firmly. with the engine running.
■ The saw can be damaged if it is run on a fuel ► Work calmly and carefully.
mixture consisting of unsuitable gasoline or an ■ The user will not be able to control the chain‐
unsuitable two-stroke engine oil or if an incor‐ saw properly if it is operated with the Master
rect mix ratio of gasoline and two-stroke Control lever in the position . This can result
engine oil is used. in serious injuries.
► Mix the fuel as described in this instruction ► Move the Master Control lever to position .
manual. ► Start the engine as described in this instruc‐
■ The mixture of gasoline and two-stroke engine tion manual.
oil can separate if it is stored for a long period. ■ Do not accelerate the engine with the chain
The saw can be damaged if it is used with a brake engaged since this can damage the
fuel mix that has separated. chain brake.
► Before refueling the saw: Thoroughly mix the ► Disengage the chain brake before you start
fuel. cutting.
► Use a mixture of gasoline and two-stroke ■ The rotating saw chain can cut the operator.
engine oil that is not older than 30 days This can result in serious injuries.
(STIHL MotoMix: 2 years). ► Do not touch the rotating saw chain.
► If the saw chain is blocked by an object: Shut
4.8 Working
off the engine and engage the chain brake.
4.8.1 Sawing Then remove the object causing the block‐
age.
WARNING ■ The rotating chain becomes hot and expands.
■ Always work within calling distance of others If the chain is not lubricated sufficiently and
► in case help is needed. retensioned, it can come off the guide bar or
■ If the engine is not started properly, the user break. This can result in serious injuries and
may lose control of the chainsaw. This can damage to property.
result in serious injuries. ► Use special chain oil.
► Start the engine as described in this instruc‐ ► Check chain tension regularly during cutting
tion manual. work. If chain tension is insufficient: Tension
► If the saw chain is touching the ground or the chain.
objects: Do not start the engine. ■ If the behavior of the saw changes during
■ The user cannot concentrate on the work in operation or feels unusual, it may no longer be
certain situations. The user can lose control of in a safe condition. This can result in serious
the saw, trip or fall and be seriously injured. injuries and damage to property.
► Work calmly and carefully. ► Stop work and contact your STIHL dealer for
► If light and visibility are poor: Do not use your assistance.
saw. ■ Saw vibrations may occur during operation.
► Operate the chain saw alone. ► Wear gloves.
► Do not work above shoulder height. ► Take regular breaks.
► Watch out for obstacles. ► If signs of circulation problems occur: Seek
► Stand on the ground while working and keep medical advice.
a good balance. If it is necessary to work at ■ Sparks may occur if the rotating chain makes
heights: Use a lift bucket or a safe platform. contact with a hard object. Sparks may cause
► If you begin to feel tired: Take a break. a fire in an easily combustible location. This
■ Exhaust gas is produced when the engine is can result in serious or fatal injuries and dam‐
running. Breathing in exhaust gas can have age to property.
toxic effects. ► Do not work in an easily combustible loca‐
► Avoid inhaling exhaust gas. tion.

0458-890-8321-B. VA0.A21. 7
English 4 Safety Precautions
■ Note that the saw chain continues to rotate for ► Remove broken or dead branches from the
a short period after you release the trigger. tree crown before felling.
The rotating saw chain can cut the user. This ► If broken or dead branches cannot be
can result in serious injuries. removed from the crown: Do not fell the tree.
► Wait for the chain to come to a standstill. ► Observe tree crown and crowns of neighbor‐
ing trees and keep clear of falling branches.
■ When the tree falls the trunk can break or
spring back in the direction of the user. This
can result in serious or fatal injuries.
1 2 ► Plan an escape path sideways behind the
tree.
2 1 ► Walk backwards along the escape path and

0000-GXX-1245-A0
observe the falling tree.
► Do not walk backwards down slopes.
■ Obstacles in the work area and on the escape
path can hinder the user. The user may trip
WARNING and fall. This can result in serious or fatal inju‐
■ The guide bar can be pinched when cutting ries.
wood that is under tension. The user can lose ► Remove all obstacles from the work area
control of the saw and be seriously injured. and escape path.
► Make a relieving cut in the compression side ■ If you cut into or through the hinge, stabilizing
(1) first, then perform bucking cut at the ten‐ strap or holding strap too soon, the intended
sion side (2). direction of fall cannot be controlled or the tree
can fall prematurely. This can result in serious
4.8.2 Limbing or fatal injuries and damage to property.
► Do not cut into or through the hinge.
WARNING ► Cut through the stabilizing strap or holding
■ If the underside of the felled tree is limbed strap last.
first, it will no longer be supported on the ► If the tree begins to fall too soon: Abandon
ground by branches. The tree can move dur‐ the felling cut and retreat along the escape.
ing cutting work. This can result in serious or ■ Kickback can occur if the rotating chain in the
fatal injuries. upper quadrant of the bar nose makes contact
► Cut through large limbs on the underside of with a hard felling wedge and is suddenly
the tree only after it has been bucked. braked. This can result in serious or fatal inju‐
► Do not stand on the log while limbing it. ries.
■ A branch may fall to the ground during limbing. ► Use aluminum or plastic felling wedges.
The user may trip, fall or be seriously injured. ■ If the tree does not fall all the way to the
► Limb from the base to the crown of the tree. ground or gets caught on another tree, the
operator cannot finish the operation in a con‐
4.8.3 Felling
trolled manner.
WARNING ► Stop the felling operation and use a cable
winch or suitable vehicle to pull the tree to
■ Inexperienced users cannot assess the dan‐
the ground.
gers of felling a tree. This can result in serious
or fatal injuries and damage to property.
► If you have any queries: Do not fell the tree
yourself.
■ A tree and branches can fall on bystanders or
objects during the felling operation. This can
result in serious or fatal injuries and damage
to property.
► Determine direction of fall so that the area in
which the tree falls is clear.
► Do not allow bystanders, children or animals
within 2.5 tree lengths of the felling site.

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4 Safety Precautions English

4.9 Reactive Forces 4.9.2 Pull-in

4.9.1 Kickback

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0000-GXX-2732-A0
The saw is pulled away from the operator when
Kickback can be caused for the following rea‐ the bottom of the bar is used for cutting.
sons:
– The rotating saw chain in the upper quadrant
WARNING
of the bar nose makes contact with a hard ■ If the rotating chain makes contact with a hard
object and is suddenly braked. object and is suddenly pinched, the saw is
– The rotating saw chain is pinched at the bar abruptly jerked away from the operator. The
nose. operator can lose control of the saw and be
seriously or fatally injured.
The chain brake cannot prevent kickback. ► Hold the saw firmly with both hands.
WARNING ► Operate the saw as described in this instruc‐
tion manual.
■ ► Keep the guide bar straight in the cut.
► Apply the spiked bumper properly.
► Always cut with the chain running at full
speed.
4.9.3 Pushback
0000-GXX-4119-A0

If kickback occurs, the saw can be thrown up

in the direction of the operator. The operator
can lose control of the saw and be seriously or

0000-GXX-1349-A0
fatally injured.
► Hold the saw firmly with both hands.
► Always keep your body out of the plane of
the cutting attachment.
► Use the working techniques described in this The saw is pushed back toward the operator
instruction manual. when the top of the bar is used for cutting.
► Do not cut with the upper quadrant of the bar
nose. WARNING
► Always cut with a properly sharpened and ■ If the rotating chain makes contact with a hard
tensioned saw chain. object and is suddenly pinched, the saw can
► Use a reduced kickback saw chain. be abruptly pushed back toward the operator.
► Use a guide bar with a narrow radius nose. The operator can lose control of the saw and
► Always cut with the chain running at full be seriously or fatally injured.
speed. ► Hold the saw firmly with both hands.
► Operate the saw as described in this instruc‐
tion manual.
► Keep the guide bar straight in the cut.
► Always cut with the chain running at full
speed.

0458-890-8321-B. VA0.A21. 9
English 5 Preparing the Saw for Operation

4.10 Transporting ■ The muffler and engine may be hot after a

period of operation. This can result in burn
WARNING injuries.
■ The saw may turn over or shift during trans‐ ► Wait until the muffler and engine cool down.
port. This can result in serious injuries and ■ Aggressive cleaning agents, a water jet or
damage to property. pointed objects can damage the chainsaw,
► Shut off the engine. guide bar and saw chain. If the chainsaw,
► Engage the chain brake. guide bar or saw chain are not cleaned cor‐
► Fit the scabbard so that it completely covers rectly, components may no longer function
the guide bar. properly or safety devices may be rendered
► Secure the chainsaw with lashing straps or a inoperative. They may cause serious injury to
net to prevent it turning over and moving. persons.
■ ► Clean the chainsaw, guide bar and saw
chain as described in this user manual.
■ If the chainsaw is not maintained as described
in this user manual, components may no lon‐
ger function properly or safety devices may be
rendered inoperative. This may result in
0000-GXX-2733-A0
serous or fatal injury to people.
► Service or repair the chainsaw as described
in this user manual.
■ If the guide bar and saw chain are not main‐
The muffler and engine may be hot after a tained or repaired as described in this user
period of operation. There is a risk of burn manual, components may no longer function
injuries. properly or safety devices may be rendered
► Carry the saw by holding the front handle in inoperative. They may cause serious injury to
your right hand with the guide bar pointing to persons.
the rear. ► Service or repair the guide bar and saw
chain as described in this User Manual.
4.11 Storing ■ The user may be cut by the sharp cutters
WARNING while cleaning or servicing the saw chain. This
may result in injury to the user.
■ Children are not aware of and cannot assess ► Wear work gloves made from resistant mate‐
the dangers of a chainsaw and can be seri‐ rial.
ously injured.
► Shut off the engine. 5 Preparing the Saw for
► Engage the chain brake.
► Fit the scabbard so that it completely covers Operation
the guide bar.
► Store the saw out of the reach of children.
5.1 Preparing the Saw for Opera‐
■ Dampness can corrode the electrical contacts tion
on the saw and metal components. This can Perform the following steps before starting work:
damage the saw. ► Make sure the following components are in a
► Store the saw in a clean and dry condition. safe condition:
– Chainsaw, 4.6.1.
4.12 Cleaning, Maintenance and
– Guide bar, 4.6.2.
Repair – Saw chain, 4.6.3.
WARNING ► Clean the saw, 15.
► Mount the bar and chain, 6.1.1.
■ The saw chain can start up unintentionally if ► Tension the saw chain, 6.2.
the engine is running during cleaning, mainte‐ ► Fill up with chain oil, 6.3.
nance or repair operations. This may result in ► Check the chain brake, 10.4.
serious injury to people and damage to prop‐ ► Refuel the saw, 8.2.
erty.
► Check the controls, 10.5.
► Shut off the engine.
► Check chain lubrication, 10.6.
► Engage the chain brake.

10 0458-890-8321-B. VA0.A21.
6 Assembling the Saw English
► If you cannot carry out these steps: Do not use
► Fit the guide bar and chain on the saw and
your chainsaw and contact your STIHL servic‐
check the following points:
ing dealer for assistance.
– Chain drive links are seated in teeth of
chain sprocket (7).
6 Assembling the Saw – Collar studs (5) are located in slot in tail of
6.1 Mounting and Removing the guide bar (6).
Bar and Chain – Peg of tensioner slide (4) engages hole (8)
in guide bar (6).
6.1.1 Mounting the Bar and Chain The guide bar (6) may be either way round. The
The bar and chain combinations that can be logo on the guide bar (6) may also be upside
used with the chain sprocket are listed in the down.
specifications, 20.1. ► Disengage the chain brake.
► Shut off the engine and engage the chain
brake.

3 6
3
2

0000-GXX-A385-A0
4
0000-GXX-A371-A0

► Turn the tensioning screw (3) clockwise until

1
the chain fits snugly against the bar. Make
► Rotate the nuts (1) counterclockwise until the sure the drive link tangs engage the bar
chain sprocket cover (2) can be removed. groove.
► Remove the chain sprocket cover (2). The guide bar (6) and chain are seated
► Turn the tensioning screw (3) counterclock‐ against the saw.
wise until the tensioner slide (4) butts against ► Fit the sprocket cover (2) so that it is flush with
the left end of the housing. the saw.
► Fit and tighten down the nuts (1) firmly.
6.1.2 Removing the Bar and Chain
► Shut off the engine and engage the chain
brake.
► Rotate the nuts counterclockwise until the
chain sprocket cover can be removed.
► Remove the sprocket cover.
0000-GXX-2954-A0

► Turn the tensioning screw counterclockwise as

far as stop.
The chain is now slack.
► Fit the chain in the bar groove so that the ► Remove the bar and chain.
arrows on the tie straps on the top of the bar
point in the direction of rotation. 6.2 Tensioning the Saw Chain
The saw chain expands or contracts during cut‐
ting work. Chain tension changes as a result.
Check chain tension regularly during operation
5 5 6 and readjust if necessary.
7
► Shut off the engine and engage the chain
8
brake.
0000-GXX-A372-A0

0458-890-8321-B. VA0.A21. 11
English 7 Engaging and Disengaging the Chain Brake

0000-GXX-2931-A0
0000-GXX-2929-A1
1 1
a
3
2
► Loosen the nuts (1). ► Place the cap in the filler opening so that mark
► Disengage the chain brake. (1) lines up with mark (2).
► Hold the bar nose up and turn the tensioning ► Press the cap down and rotate it clockwise as
screw (2) clockwise until the following points far as stop.
apply: The cap snaps into place. The mark (1) points
– Chain sag ‘a’ in the center of the bar is 1 - 2 to mark (3),
mm. ► Check to see if the oil tank cap can be pulled
– The chain can still be pulled easily along the upwards and off.
bar with two fingers. ► If the oil tank cap cannot be pulled upwards
► Keep holding the bar nose up and tighten and off: Fold down the grip on the oil tank cap.
down the nuts (1) firmly. The oil tank is closed.
► If chain sag ‘a’ in the center of the bar is not 1
If the oil tank cap can be pulled upwards and off,
- 2 mm: Readjust chain tension.
perform the following steps:
6.3 Filling Up with Chain Oil ► Place the oil tank cap in the filler opening – in
any position.
Chain oil lubricates and cools the rotating chain.
► Shut off the engine and engage the chain
brake.
► Place your saw on a level surface so that the
1
oil tank cap faces up.
► Use a damp cloth to clean the tank cap and
the area around it.

0000-GXX-3135-A0
2

► Press the cap down and rotate it clockwise as

far as stop.
► Press the cap down and rotate it counterclock‐
wise until mark (1) points to mark (2).
0000-GXX-2930-A0

► Now try again to close the oil tank.

► If the oil tank still cannot be closed properly:
Do not use the chainsaw and contact a STIHL
► Swing the grip on the oil tank cap to the verti‐ dealer for assistance.
cal position. The chainsaw is not in a safe condition.
► Turn the oil tank cap counterclockwise as far
as stop. 7 Engaging and Disengaging
► Remove the oil tank cap.
► Fill up with chain oil, taking care not to spill the Chain Brake
any oil and do not overfill the tank. 7.1 Engaging the Chain Brake
► If the grip on the oil tank cap has dropped into
the closed position: Raise the grip until it is The saw is equipped with a chain brake.
vertical. The chain brake is activated by the inertia of the
front hand guard if the kickback force is high
enough or can be engaged by the operator.

12 0458-890-8321-B. VA0.A21.
8 Mixing Fuel and Refueling the Chainsaw English
► Depending on the required amount of fuel,
determine the correct amounts of two-stroke
engine oil and gasoline in a mix ratio of 50:1.
Examples for fuel mixes:
– 1 liter gasoline, 20 ml two-stroke engine oil
– 3 liters gasoline, 60 ml two-stroke engine oil
– 5 liters gasoline, 100 ml two-stroke engine

0000-GXX-2932-A0
oil
► Pour two-stroke engine oil into a clean
approved fuel canister first and then add gaso‐
► Push the hand guard away from the front han‐ line.
dle with your left hand. ► Thoroughly mix the fuel.
The hand guard engages with an audible click.
The chain brake is engaged.
8.2 Fueling the Saw
► Shut off the engine and engage the chain
7.2 Disengaging the Chain Brake brake.
► Allow chainsaw to cool down.
► Place your chainsaw on a level surface so that
the fuel tank cap faces up.
► Use a damp cloth to clean the tank cap and
the area around it.
► Swing the grip on the fuel tank cap to the verti‐
cal position.
0000-GXX-2933-A0

► Pull the hand guard toward the front handle

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

0000-GXX-2934-A1
8 Mixing Fuel and Refueling
the Chainsaw
WARNING
8.1 Mixing Fuel
■ The chainsaw becomes hot during operation,
This chainsaw requires a fuel mixture of gasoline
or in a very hot environment. Depending on
and two-stroke engine oil in a ratio of 50:1.
the type of fuel, altitude, ambient temperature
STIHL recommends you use STIHL MotoMix. and the temperature of the saw, the fuel
expands and can cause a pressure build-up in
If you mix the fuel yourself, use only STIHL two-
the tank. Fuel may escape as a spray and
stroke engine oil or another high-performance
ignite when the fuel tank cap is opened. This
engine oil in accordance with JASO FB, JASO
can result in serious injuries and damage to
FC, JASO FD, ISO-L-EGB, ISO-L-EGC or ISO-L-
property.
EGD.
► Allow the saw to cool down before opening
STIHL specifies STIHL HP Ultra two-stroke the tank cap.
engine oil or an equivalent high-performance ► Open the tank cap slowly in stages.
engine oil in order to maintain emission limits ► Turn the fuel tank cap about 1/8 of a turn
throughout the machine’s service life. counterclockwise.
► Make sure that the octane number of the gas‐ If the fuel tank is under pressure, you will hear
oline is at least 90 RON and the ethanol con‐ pressure being released.
tent is not more than 10%. ► When the tank is no longer under pressure:
► Make sure the two-stroke engine oil you are Turn the tank cap counterclockwise until the
using meets the requirements. marks on the cap and fuel tank are in align‐
ment.

0458-890-8321-B. VA0.A21. 13
English 9 Starting and Stopping the Engine
► Remove the fuel tank cap.
► Press the cap down and rotate it counterclock‐
wise until mark (1) points to mark (2).
NOTICE
► Now try again to close the fuel tank.
■ Bright light, sunlight and extreme tempera‐ ► If the fuel tank still cannot be closed properly:
tures can cause the fuel mix to separate much Do not use the chainsaw and contact a STIHL
faster. The saw can be damaged if it is used dealer for assistance.
with a fuel mix that has become separated. The chainsaw is not in a safe condition.
► Thoroughly mix the fuel.
► Do not use fuel mix that has been stored for 9 Starting and Stopping the
more than 30 days.
Engine
► Fill the tank to within no more than 15 mm
of the brim, taking care not to spill any fuel. 9.1 Selecting the Correct Starting
► If the grip on the fuel tank cap has dropped Procedure
into the closed position: Raise the grip until it
is vertical. When must the engine be prepared for starting?
The engine must be prepared for starting if one
1 of the following conditions apply:
4 – The engine is at ambient temperature.
1 – The engine stopped when accelerated for the
first time.
– The engine stopped because the fuel tank was
empty.
0000-GXX-2935-A1

► Prepare engine for start and then start the

3 engine.
2
► Place the cap in the filler opening so that mark When can the engine be started without prepara‐
(1) lines up with mark (2). tion?
► Press the cap down and rotate it clockwise as The engine can be started without preparation if
far as stop. it has been running for at least 1 minute and only
The cap snaps into place. The mark (1) is in shut down for a short work break.
line with mark (4) and points to mark (3). ► Start the engine.
► Check to see if the fuel tank cap can be pulled
upwards and off. 9.2 Preparing the engine for start
► If the fuel tank cap cannot be pulled upwards ► Select the correct starting procedure.
and off: Fold the grip flush with the top of the
cap. 2
The fuel tank is closed.
If the fuel tank cap can be pulled upwards and 1
off, perform the following steps:
► Place the fuel tank cap in the filler opening – in
0000-GXX-A373-A0

any position. 3
4
A B C 5
► Engage the chain brake (2).
1 ► Depress the decompression valve (1).
► Press the throttle trigger lockout (5) and keep
pressed.
► Press the throttle trigger (4) and keep pressed.
0000-GXX-3136-A1

► Move the Master Control Lever (3) to posi‐

2 tion .
► Press the cap down and rotate it clockwise as
far as stop.

14 0458-890-8321-B. VA0.A21.
9 Starting and Stopping the Engine English

0000-GXX-A374-A0
0000-GXX-2936-A0
3
4
5

► Hold the chainsaw tight using of the three pos‐ ► Engage the chain brake (2).
sible options: ► Pull off the chain scabbard.
– Place the chainsaw on level ground. Hold ► Depress the decompression valve (1).
the saw firmly on the ground with your left ► Press the throttle trigger lockout (5) and keep
hand on the handlebar – your thumb should pressed.
be under the handlebar. Put the toe of your ► Press the throttle trigger (4) and keep pressed.
right boot into the rear handle and press ► Move the Master Control Lever (3) to posi‐
down. tion .
– Place the chainsaw on level ground. Hold ► Move the Master Control Lever (3) to posi‐
the saw firmly on the ground with your left tion .
hand on the handlebar – your thumb should
be under the handle. Put the heel of your
right boot into the rear handle and press
down.
– Hold the chainsaw firmly with your left hand
on the handlebar – your thumb should be
under the handle. Hold the rear handle

0000-GXX-2936-A0
tightly between your legs, just above the
knees.

► Hold the chainsaw using one of the three pos‐

sible options:
– Place the chainsaw on level ground. Hold
the saw firmly on the ground with your left
hand on the handlebar – your thumb should
be under the handlebar. Put the toe of your
0000-GXX-2937-A0

right boot into the rear handle and press

down.
– Place the chainsaw on level ground. Hold
► Pull the starter grip slowly with your right hand the saw firmly on the ground with your left
until you feel it engage. hand on the handlebar – your thumb should
► Pull the starter grip quickly and allow the be under the handle. Put the heel of your
starter rope to rewind several times until the right boot into the rear handle and press
engine fires and stops. down.
► If the engine does not stop: Move the master – Hold the chainsaw firmly with your left hand
control lever (3) to position so that the on the handlebar – your thumb should be
engine does not flood. under the handle. Hold the rear handle
The engine stops. tightly between your legs, just above the
knees.
9.3 Starting the engine
► Select the correct starting procedure.

0458-890-8321-B. VA0.A21. 15
English 10 Checking the Saw

10 Checking the Saw

10.1 Checking the Chain Sprocket
► Shut off the engine.
► Disengage the chain brake.
► Remove the chain sprocket cover.
► Remove the bar and chain.

0000-GXX-2937-A0
► Pull the starter grip slowly with your right hand
until you feel it engage.
► Pull the starter grip quickly and allow the
starter rope to rewind several times until the

0000-GXX-3162-A0
engine runs. a
► Press the throttle trigger lockout (5) and keep
pressed.
► Blip the throttle trigger (4). ► Use a STIHL gauge to check the wear marks
The master control lever (3) springs to position on the sprocket.
. The engine runs at idling speed. ► If wear marks are deeper than a = 0.5 mm: Do
not use your chainsaw and contact your
NOTICE STIHL servicing dealer for assistance.
The chain sprocket must be replaced.
■ Do not accelerate the engine with the chain
brake engaged since this can damage the 10.2 Checking the Guide Bar
chain brake. ► Shut off the engine and engage the chain
► Disengage the chain brake before you start brake.
cutting. ► Remove the chain and guide bar.
► Disengage the chain brake.
The chainsaw is ready for use.
► If the saw chain rotates while the engine is
idling: See troubleshooting.
Idle speed adjustment is not correct.
► If the engine does not start: Prepare the
engine for the start and then try again to start

0000-GXX-1217-A0
the engine.

9.4 Stopping the Engine

► Measure depth of bar groove with scale on
STIHL filing gauge.
► Install a new guide bar if one of the following
points applies:
3
– Guide bar is damaged.
– Measured bar groove depth is less than
1
0000-GXX-A375-A0

specified minimum depth, 19.3.

2 – Bar groove is pinched or splayed.
► If you have any queries: Contact your STIHL
servicing dealer for assistance.
► Release the throttle trigger (2) and lockout
lever (3). 10.3 Checking the Saw Chain
The saw chain stops running. ► Shut off the engine and engage the chain
► Move the Master Control lever (1) to posi‐ brake.
tion .
The engine stops and the Master Control lever
(1) springs back to position .

16 0458-890-8321-B. VA0.A21.
11 Operating the Saw English

10.5 Checking the Controls

1 Throttle trigger lockout and throttle trigger
2 ► Shut off the engine and engage the chain
brake.
► Attempt to pull the trigger without depressing
the lockout lever.

0000-GXX-1218-A0
► If the trigger can be pulled: Do not use your
chainsaw and contact your STIHL servicing
dealer for assistance.
► Use a STIHL filing gauge (2) to check the There is a malfunction in the throttle trigger
height of the depth gauges (1). The STIHL fil‐ lockout.
ing gauge must match the chain pitch. ► Press down the throttle trigger lockout and
► If a depth gauge (1) projects from the filing hold it there.
gauge (2): Lower the depth gauge (1), 16.3. ► Pull the throttle trigger and release it again.
► If the throttle trigger is stiff or does not spring
1 back to its idle position: Do not use your chain‐
saw and contact your STIHL servicing dealer
for assistance.
2 3 The throttle trigger is defective.
Stopping the engine
► Start the engine.
0000-GXX-1372-A0

► Move the Master Control lever to position .

4
The engine stops and the Master Control lever
springs back to position .
► Make sure the service marks (1 to 4) on the ► If the engine does not stop:
cutters are visible. ► Move the Master Control lever to posi‐
► If one of the service marks is not visible on a
tion .
cutter: Do not use your chainsaw and contact
The engine stops.
your STIHL servicing dealer for assistance.
► Do not use your chainsaw and contact your
► Use a STIHL filing gauge to check that a filing
STIHL servicing dealer for assistance.
angle of 30° has been maintained on all cut‐
The Master Control lever is defective.
ters. The STIHL filing gauge must match the
chain pitch. 10.6 Checking Chain Lubrication
► If a filing angle of 30° has not been main‐ ► Start the engine and disengage the chain
tained: Resharpen the saw chain. brake.
► If you have any queries: Contact your STIHL ► Hold the guide bar over a light surface.
servicing dealer for assistance. ► Open the throttle.
10.4 Testing the Chain Brake Chain oil is thrown off the chain and is visible
on the light surface. Chain lubrication is oper‐
► Shut off the engine and engage the chain
ating properly.
brake.

WARNING
11 Operating the Saw
■ The chain's cutters are very sharp. There is a 11.1 Setting to winter mode
risk of cut injuries. The carburetor may ice up if the engine is oper‐
► Wear work gloves made of durable material. ated at temperatures below +10 °C. The shutter
► Try to pull the chain along the guide bar by must be set to the winter mode so that the carbu‐
hand. retor is additionally heated by warm air from
If the chain cannot be pulled along the bar by around the engine.
hand, the chain brake is functioning.
► If the chain can be pulled along the bar by
hand: Do not use your chainsaw and contact
your STIHL servicing dealer for assistance.
The chain brake is defective.

0458-890-8321-B. VA0.A21. 17
English 11 Operating the Saw

NOTICE
■ The engine may overheat if is operated in win‐
ter mode at temperatures above +10 °C.
► Change setting to summer mode.
3
► Shut off the engine and engage the chain

0000-GXX-A384-A0
brake. 3

1 2
► Push the shutter (2) into the guides (3) as far
as it will go.
You will feel it engage.
► Fit the filter cover (1).

0000-GXX-A383-A0
11.3 Adjusting Carburetor for Opera‐
tion at High Altitude
► Remove the filter cover (1). If you use the chainsaw at high altitude, the
► Pull out the shutter (2). engine will not deliver optimum power. The car‐
buretor setting can be adjusted to obtain opti‐
mum engine power.
► Start the engine and disengage the chain
brake.
3 ► Warm up the engine by opening and closing
the throttle for about 1 minute.
3
0000-GXX-A382-A0

► Push the shutter (2) into the guides (3) as far H

as it will go.
You will feel it engage.

0000-GXX-3132-A0
► Fit the filter cover (1).

11.2 Setting to summer mode

The shutter must be set to summer mode when
working at temperatures above +10 °C.
NOTICE
► Shut off the engine and engage the chain ■ If the chainsaw is again used at a low altitude,
brake. the engine may overheat.
► Carry out the standard setting.
1 2
► Rotate the high speed screw H clockwise
until the engine delivers optimum power.

11.4 Adjusting Carburetor for Cut‐

ting at Temperatures Below –
10°C
0000-GXX-A381-A0

The engine will not accelerate properly if the

chainsaw is used at temperatures below –10°C.
► Remove the filter cover (1). The carburetor can be adjusted to obtain normal
► Pull out the shutter (2). engine acceleration in such conditions.
► Start the engine and disengage the chain
brake.

18 0458-890-8321-B. VA0.A21.
11 Operating the Saw English
► Warm up the engine by opening and closing 11.6 Holding and Controlling the
the throttle for about 1 minute.
Chainsaw

0000-GXX-3131-A0

0000-GXX-2948-A1
NOTICE ► Hold and control your chainsaw with your left
hand on the handlebar and your right hand on
■ Engine power may drop noticeably when the the control handle. Wrap thumb of left hand
chainsaw is subsequently used at tempera‐ around the handlebar and thumb of right hand
tures above –10°C. around the control handle.
► Carry out the standard setting.
► Rotate the low speed screw (L) a quarter 11.7 Sawing
turn counterclockwise.
► If the saw chain runs continuously or the WARNING
engine stops: Adjust idle speed. ■ If kickback occurs, the chainsaw can be
thrown up in the direction of the operator. This
11.5 Adjusting Oil Feed Rate may result in serious or fatal injury to the user.
The chainsaw has an adjustable oil pump. ► Always cut with the chain running at full
speed.
► Do not cut with the upper quadrant of the
guide bar nose.
► Begin the cut with the chain running at full
speed and keep the guide bar vertical.
1
0000-GXX-7209-A0

The oil feed rate is suitable for most applications

when the oil pump adjusting screw (1) is in posi‐ 0000-GXX-2949-A1

tion E (Ematic).
The oil pump feed rate can be adjusted to suit
different bar lengths, wood species and working ► Engage the spiked bumper and use it as a ful‐
techniques. crum.
To increase oil feed rate ► Guide the full width of the guide bar into the
► Shut off the engine and engage the chain wood and reposition the spiked bumper as
brake. required.
► Turn the oil pump adjusting screw (1) clock‐ ► Take the weight of the chainsaw at the end of
wise. the cut.
To reduce oil feed rate
► Shut off the engine and engage the chain
brake.
► Turn the oil pump adjusting screw (1) counter‐
clockwise.

0458-890-8321-B. VA0.A21. 19
English 11 Operating the Saw

11.8 Limbing 11.9.2 Preparing work area at base of tree

► Remove obstacles from work area at tree
base.
► Remove growth from tree base.

0000-GXX-2950-A1

0000-GXX-1247-A0
► Support the chainsaw on the log.
► With the chain running a full speed, pivot the
guide bar downward against the limb.
► Cut through the limb with the top of the guide ► If the tree has large, healthy buttress roots:
bar. Make vertical cut first and then a horizontal
cut, and remove the resulting piece.
11.9.3 Basic information on felling cut

1 2

2 1
0000-GXX-1245-A0

C E
C 1/10

0000-GXX-1251-A1
Ø G
► If the limb is under tension: Make the relieving
cut (1) at the compression side and then per‐
form the bucking cut (2) from the tension side.
C Felling notch
11.9 Felling The felling notch determines the direction of
fall.
11.9.1 Determining direction of fall and
escape path D Hinge
► Determine direction of fall so that the area in The hinge helps control the falling tree. The
which the tree falls is clear. width of the hinge is 1/10 of the trunk diame‐
ter.
E Felling cut
The tree is felled with the felling cut. The fell‐
ing cut is 1/10 of the trunk diameter (at least 3
cm) above the bottom of the felling notch.
F Stabilizing strap
The stabilizing strap supports the tree and
0000-GXX-1246-A0

helps prevent it from falling prematurely. The

width of the stabilizing strap is 1/10 to 1/5 of
B
B

the trunk diameter.

► Observe the following points when planning G Holding strap
escape path (B): The holding strap supports the tree and helps
– Escape path (B) at an angle of 45° to direc‐ prevent it from falling prematurely. The width
tion of fall (A). of the holding strap is 1/10 to 1/5 of the trunk
– No obstacles on the escape path (B). diameter.
– The top of the tree can be observed.
– If the escape path (B) is on a slope, it must
be parallel to the slope.

20 0458-890-8321-B. VA0.A21.
11 Operating the Saw English
11.9.4 Cutting the felling notch
► Cut until depth of kerf is twice the width of the
The felling notch determines the direction in guide bar.
which the tree falls. Country-specific standards ► Swing the saw into plunge-cutting position.
for making the felling notch must be observed. ► Perform the plunge cut
11.9.6 Selecting the Appropriate Felling Cut
The choice of appropriate felling cut depends on
the following conditions:
– The natural inclination of the tree
– The tree’s branch formation
– Damage to the tree
– The tree’s state of health

0000-GXX-1249-A0
– If there is snow on the tree: the snow load
– The direction of slope
– Wind direction and speed
► Position the saw so that the felling notch is an
– Nearby trees, if any
right angles to the direction of fall and the saw
is close to the ground. There are different features of these conditions.
► Make the horizontal cut. Only two features are described in this Instruc‐
► Make the angle cut at 45° to the horizontal cut. tion Manual.

0000-GXX-1253-A0
0000-GXX-1250-A1

1 2

► If the wood is sound and long-fibered: 1 Normal tree

Observe the following points when making A normal tree is vertical and has an even
sapwood cuts: crown.
– The cuts must be the same at both sides.
– The cuts must be at same height as bottom 2 Leaner
of felling notch. A leaner stands at an angle and the crown
– The width of the cuts is 1/10 of the trunk faces in the direction of fall.
diameter. 11.9.7 Felling normal, small diameter tree
The trunk does not splinter when the tree falls.
A normal tree is felled with a felling cut and stabi‐
11.9.5 Plunge cutting lizing strap. This felling cut must be performed if
Plunge cutting is a technique required for felling. the tree diameter is less than the guide bar’s
length.
► Shout a warning.

1.
2.

1.
0000-GXX-1252-A0

3.
0000-GXX-1254-A0

2.

► Begin cut with the lower portion of the guide

bar nose – with chain running at full speed.

0458-890-8321-B. VA0.A21. 21
English 11 Operating the Saw

► Plunge the guide bar into the felling cut until it ► Enlarge felling cut in direction of stabilizing
is visible at the other side of the trunk, strap.
11.9.5.
► Apply the spiked bumper behind the hinge and
use it as a pivot.
6.
► Enlarge felling cut in direction of hinge.
► Enlarge felling cut in direction of stabilizing
strap.

0000-GXX-1257-A0
3.

► Insert a felling wedge. The felling wedge must

match the tree diameter and the width of the
felling cut.

0000-GXX-1255-A0
► Shout a warning.
► With outstretched arms, cut through the stabi‐
lizing strap horizontally from outside at the
► Insert a felling wedge. The felling wedge must same level as the felling cut.
match the tree diameter and the width of the The tree falls.
felling cut.
11.9.9 Felling a small diameter leaner
► Shout a warning.
► With outstretched arms, cut through the stabi‐ A leaner is felled with a felling cut and holding
lizing strap horizontally from outside at the strap. This felling cut must be performed if the
same level as the felling cut. tree diameter is less than the guide bar’s length.
The tree falls. ► Shout a warning.
11.9.8 Felling normal, large diameter tree
1. 2.
A normal tree is felled with a felling cut and stabi‐
lizing strap. This felling cut must be performed if
the tree diameter is greater than the guide bar’s
length.
► Shout a warning.

0000-GXX-1258-A0
► Plunge the guide bar into the felling cut until it
1. 4. 5. is visible at the other side of the trunk,
2.
3. 11.9.5.
► Enlarge felling cut in direction of hinge.
0000-GXX-1256-A0

► Enlarge felling cut in direction of holding strap.

► Apply the spiked bumper at the same height

as the felling cut and use it as a pivot.
► Hold the saw horizontally and swing it into the
felling cut as far as possible.
► Enlarge felling cut in direction of hinge.
0000-GXX-1259-A0

► Enlarge felling cut in direction of stabilizing

strap.
► Move to the other side of the tree.
► Plunge the guide bar into the felling cut at the ► Shout a warning.
same height.
► Enlarge felling cut in direction of hinge.

22 0458-890-8321-B. VA0.A21.
12 After Finishing Work English
► Allow chainsaw to cool down.
► With arms outstretched, cut through the hold‐
► If the saw is wet: Allow the saw to dry.
ing strap from outside at a downward angle.
► Clean the saw.
The tree falls.
► Clean the bar and chain.
11.9.10 Felling a large diameter leaner ► Loosen nuts on the chain sprocket cover.
► Turn the tensioning screw two full turns coun‐
A leaner is felled with a felling cut and holding
terclockwise.
strap. This felling cut must be performed if the
The chain is now slack.
tree diameter is greater than the guide bar’s
► Tighten down nuts on the chain sprocket
length.
cover.
► Shout a warning.
► Fit the scabbard so that it completely covers
the guide bar.

13 Transporting
1.
5. 6.
13.1 Transporting the Chainsaw
2. 3.
4.
► Shut off the engine and engage the chain
brake.
0000-GXX-1260-A0 ► Fit the scabbard so that it completely covers
the guide bar.

► Apply the spiked bumper behind the holding Carrying the saw
strap at the same height as the felling cut and ► Carry the saw by holding the front handle in
use it as a pivot. your right hand with the guide bar pointing to
► Hold the saw horizontally and swing it into the the rear.
felling cut as far as possible. Transporting the saw in a vehicle
► Enlarge felling cut in direction of hinge. ► Secure the saw to prevent turnover and move‐
► Enlarge felling cut in direction of holding strap. ment.
► Move to the other side of the tree.
► Apply the spiked bumper behind the hinge at 14 Storing
the same height as the felling cut and use it as
a pivot. 14.1 Storing the Chainsaw
► Hold the saw horizontally and swing it into the ► Shut off the engine and engage the chain
felling cut as far as possible. brake.
► Enlarge felling cut in direction of hinge. ► Fit the scabbard so that it completely covers
► Enlarge felling cut in direction of holding strap. the guide bar.
► Observe the following points when storing the
saw:
– Saw is out of the reach of children.
– The saw is clean and dry.

15 Cleaning
15.1 Cleaning the chainsaw
0000-GXX-1261-A0

► Shut off the engine and engage the chain

brake.
► Allow the chainsaw to cool down.
► Shout a warning. ► Clean the chainsaw with a damp cloth or
► With arms outstretched, cut through the hold‐ STIHL resin solvent.
ing strap from outside at a downward angle. ► Clean vents with a paintbrush.
The tree falls.

12 After Finishing Work

12.1 After Finishing Work
► Shut off the engine and engage the chain
brake.

0458-890-8321-B. VA0.A21. 23
English 15 Cleaning

by brushing or knocking out. The air filter must

3
1 be cleaned with a cleaning agent.
2 ► Shut off the engine and engage the chain
brake.
► Press the throttle trigger lockout and keep
pressed.
► Press the throttle trigger and keep pressed.

0000-GXX-A376-A0
3 ► Move the Master Control Lever to position .
4
3 ► Release the throttle trigger and throttle trigger
lockout.
► Remove the filter cover (1).
► Pull off the spark plug boot (2). 1 3
► Turn the shroud locks (3) counterclockwise 2
until the cover (4) can be removed.
► Remove cover (4).
► Remove the chain sprocket cover.
► Use a soft brush, damp cloth or STIHL resin

0000-GXX-A377-A0
solvent to clean the chain sprocket cover, cyl‐
inder fins and the inside of the cover and filter
cover.
► Clean the area around the chain sprocket with
► Turn the filter cover lock (1) counterclockwise
a damp cloth or STIHL resin solvent.
until the filter cover (2) can be removed.
► Fit the cover (4).
► Remove filter cover (2).
► Turn the shroud locks (3) clockwise and
► Clean the area around the air filter (3) with a
tighten them firmly.
damp cloth or a soft brush.
The cover (4) is closed.
► Remove the air filter (3).
► Press the spark plug boot (2) firmly home.
► Rinse away coarse dirt from the outside of the
► Fit the filter cover (1).
air filter (3) under running water.
► Fit the chain sprocket cover.
► If the air filter (3) is damaged: Install a new air
15.2 Cleaning the Bar and Chain filter (3).
► Shut off the engine and engage the chain
brake. WARNING
► Remove the bar and chain. ■ If detergents come into contact with the skin or
eyes, the skin or eyes may be irritated.
► Observe the user manual for the detergent.
3 ► Avoid contact with detergents.
1
► If skin contact occurs: Wash affected areas
of skin with plenty of water and soap.
► If eye contact occurs: Flush eyes with plenty
of water for at least 15 minutes and consult a
0000-GXX-2951-A0

doctor.
2 3
► Spray the outside and inside of the air filter
(3) with STIHL special cleaner or a cleaning
► Clean the oil port (1), oil inlet hole (2) and bar agent with a pH value higher than 12.
groove (3) with a soft brush or STIHL resin ► Allow STIHL special cleaner or cleaning agent
solvent. to act for 10 minutes.
► Clean the saw chain with a soft brush or ► Use a soft brush to clean the outside of the air
STIHL resin solvent. filter (3).
► Mount the bar and chain. ► Rinse the outside and inside of the air filter (3)
under running water.
15.3 Cleaning the Air Filter ► Allow the air filter (3) to dry in the air.
Very fine dust can collect in the air filter. The
dust can clog the filter and cannot be removed

24 0458-890-8321-B. VA0.A21.
16 Maintenance English
► Press the spark plug boot (2) firmly home.
3 1 ► Fit the filter cover (1).
2
16 Maintenance
16.1 Maintenance Intervals
The maintenance intervals are dependent on the

0000-GXX-A378-A0
environmental and operating conditions. STIHL
recommends the following maintenance inter‐
vals:
► Push the air filter (3) into place by hand.
Chain brake
► Fit the filter cover (2).
► Have the chain brake serviced by a STIHL
► Turn the filter cover lock (1) clockwise and
servicing dealer at the following intervals:
tighten it down firmly by hand.
– Full-time usage: every 3 months
The filter cover (2) is closed.
– Part-time usage: every 6 months
► Press the throttle trigger lockout and keep
– Occasional usage: every 12 months
pressed.
► Press the throttle trigger and keep pressed. After every 100 hours of operation
► Move the Master Control Lever to position . ► Install a new spark plug.
The master control lever springs back to posi‐ Weekly
tion . ► Check the chain sprocket.
► Check and deburr the guide bar.
15.4 Cleaning the Spark Plug ► Check and sharpen the saw chain.
► Shut off the engine and engage the chain
Monthly
brake.
► Clean the air filter.
► Allow chainsaw to cool down.
► Have oil tank cleaned by a STIHL servicing
dealer.
2 ► Have fuel tank cleaned by a STIHL servicing
1 dealer.
► Have pickup body (filter) in fuel tank cleaned
by a STIHL servicing dealer.
Every 12 months
0000-GXX-A379-A0

► Have pickup body (filter) in fuel tank replaced

by a STIHL servicing dealer.

► Remove the filter cover (1). 16.2 Deburring the Guide Bar
► Pull off the spark plug boot (2). A burr can build up on the outer edge of the
► If area around the spark plug is dirty: Clean it guide bar.
with a damp cloth. ► Remove burr with a flat file or a STIHL guide
► Unscrew the spark plug. bar dressing tool.
► Clean the spark plug with a damp cloth. ► If you have any queries: Contact your STIHL
► If the spark plug is corroded: Install a new servicing dealer.
spark plug.
16.3 Sharpening the Saw Chain
Correctly sharpening saw chains requires a lot of
practice.
STIHL files, STIHL filing aids, STIHL sharpeners
and the brochure “Sharpening STIHL Saw
2 Chains” help you achieve the right results. To
0000-GXX-A380-A0

obtain the brochure visit http://www.stihl.com/

sharpening-brochure.
STIHL recommends you have saw chains
► Fit the spark plug and tighten it down firmly. resharpened by a STIHL servicing dealer.

0458-890-8321-B. VA0.A21. 25
English 17 Repairing

► File down the depth gauges with a flat file so

WARNING
that they are level with the STIHL filing gauge
■ The chain's cutters are very sharp. There is a and parallel to the service mark. The STIHL fil‐
risk of cut injuries. ing gauge must match the chain pitch.
► Wear work gloves made of durable material. ► If you have any queries: Contact your STIHL
servicing dealer for assistance.

17 Repairing
17.1 Repairing the Chain Saw,
Guide Bar and Saw Chain
The chain saw, guide bar and saw chain cannot

0000-GXX-1219-A0
be repaired by the user.
► If the saw, guide bar or saw chain is damaged:
Do not use your saw, guide bar or saw chain,
► File each cutter with a round file so that the and contact your STIHL servicing dealer.
following points are observed:
– Round file matches the chain pitch.
– File from the inside to the outside of the cut‐
ter.
– Hold the file at right angle to the guide bar.
– Maintain a filing angle of 30°.
0000-GXX-1220-A1

18 Troubleshooting
18.1 Troubleshooting Chainsaw
Most malfunctions have the same causes.
► Perform the following operations:
► Clean the air filter.
► Clean or replace the spark plug.
► Adjust saw for winter or summer operation.
► If the malfunction still exists: Take the action described in the following table.

Condition Cause Remedy

Engine does not Insufficient fuel in the ► Mix fuel and refuel the chainsaw.
start. tank.
Engine is flooded. ► Clear the combustion chamber.
Carburetor is too hot. ► Allow chainsaw to cool down.
Carburetor is iced up. ► Allow saw to warm up to +10°C.
Engine idles errati‐ Carburetor is iced up. ► Allow saw to warm up to +10°C.
cally.
Engine stops while Carburetor is iced up. ► Allow saw to warm up to +10°C.
idling

26 0458-890-8321-B. VA0.A21.
18 Troubleshooting English

Condition Cause Remedy

Poor acceleration The chain is over-ten‐ ► Tension the chain properly.
sioned.
Chain lubrication sys‐ ► Increase oil feed rate.
tem is supplying
insufficient chain oil.
Engine does not Saw is not correctly ► Calibrate the saw.
reach maximum tuned to ambient con‐
RPM. ditions.
Engine does not Spark arresting ► Contact your STIHL servicing dealer for assistance.
reach maximum screen in muffler is
power. dirty.
Saw chain does not The chain brake is ► Disengage the chain brake.
rotate when throttle is engaged.
opened. The chain is over-ten‐ ► Tension the chain properly.
sioned.
Bar nose sprocket is ► Clean the bar nose sprocket with STIHL resin solvent.
blocked.
Smoke or burning Chain is not properly ► Sharpen the chain properly.
smell while cutting. sharpened.
Insufficient chain oil ► Fill up with chain oil.
in the tank.
Chain lubrication sys‐ ► Increase oil feed rate.
tem is supplying
insufficient chain oil.
The chain is over-ten‐ ► Tension the chain properly.
sioned.
Chainsaw is not ► Have correct use explained, then practice.
being used properly.
18.2 Adjust to standard setting 18.3 Adjusting Idle Speed
► Shut off the engine and engage the chain
brake.

H L 0000-GXX-2938-A0
0000-GXX-2946-A0

Engine stops while idling

► Carry out the standard setting.
► Turn the high speed screw H clockwise as far
► Start the engine and disengage the chain
as it will go.
brake.
► Turn the high speed screw H 1/2 of a turn
► Warm up the engine by opening and closing
counterclockwise.
the throttle for about 1 minute.
► Turn the low speed screw L clockwise as far
► If the engine continues to stop while idling:
as it will go.
Turn the idle speed screw (LA) half a turn
► Turn the low speed screw L 1/4 of a turn coun‐
clockwise and restart the engine.
terclockwise.
► Turn the idle speed screw (LA) clockwise until
the chain begins to run.
► Turn the idle speed screw (LA) one full turn
counterclockwise.

0458-890-8321-B. VA0.A21. 27
English 19 Specifications

Saw chain runs continuously while engine is

idling
► Carry out the standard setting.
► Start the engine and disengage the chain
brake.
► Warm up the engine by opening and closing
2

0000-GXX-A380-A0
the throttle for about 1 minute.
► Turn the idle speed screw (LA) counterclock‐
wise until the saw chain stops running.
► Turn the idle speed screw (LA) one full turn
► Press the spark plug boot (2) firmly home.
counterclockwise.
► Fit the filter cover (1).
18.4 Clearing the Combustion
Chamber
19 Specifications
► Engage the chain brake. 19.1 STIHL MS 881 Chainsaw
– Displacement: 121.6 cm³
2 – Engine power to ISO 7293: 6.4 kW (8.7 bhp)
1 – Idle speed to ISO 11681: 2800 ± 50 min-1
– Approved spark plug: Bosch WSR 6 F from
STIHL
– Electrode gap of the spark plug: 0.5 mm
– Dry weight without guide bar and saw chain
0000-GXX-A379-A0

9.9 kg
– Max. fuel tank capacity: 1300 cc (1.3 l)
– Max. oil tank capacity: 700 cc (0.7 l)
► Remove the filter cover (1).
► Pull off the spark plug boot (2). 19.2 Chain Sprockets and Chain
► Unscrew the spark plug. Speeds
► Dry the spark plug. The following chain sprockets may be used:
7-tooth for .404"
WARNING – Maximum chain speed according to
■ Unconfined sparks may occur if the starter grip ISO 11681: 27.1 m/s
is pulled after the spark plug boot has been – Chain speed at maximum power: 23.9 m/s
removed. Sparks may cause a fire or an
explosion in an easily combustible or explo‐ 19.3 Minimum Groove Depth of
sive environment. This can result in serious or Guide Bars
fatal injuries and damage to property.
The minimum groove depth depends on the pitch
► Move the Master Control lever to position
of the guide bar.
and hold it there before pulling the starter – .404": 7 mm
grip.
► Move the Master Control lever to position 19.4 Sound Values and Vibration
and hold it there. Values
► Pull the starter grip and guide it back several – Sound pressure level LpA measured according
times. to ISO 22868: 106 dB(A). The K value for the
The combustion chamber is cleared. sound pressure level is 2 dB(A).
► Insert and tighten down the spark plug. – Sound power level LwA measured according to
ISO 22868: 118 dB(A). K-value (uncertainty)
for sound power level is 2 dB(A).
– Vibration level ahv, eq measured according to
ISO 22867
– Handlebar: 8.9 m/s². The K value for the
vibration level is 2 m/s².
– Control handle: 8.9 m/s². The K value for
the vibration level is 2 m/s².

28 0458-890-8321-B. VA0.A21.
20 Bar and Chain Combinations English

For information on compliance with Employers' The measured CO2value was determined on a
Vibration Directive 2002/44/EC see representative engine in accordance with a
www.stihl.com/vib. standardized test procedure under laboratory
conditions and does not represent either an
19.5 REACH explicit or implied guarantee of the performance
REACH is an EC regulation and stands for the of a specific engine.
Registration, Evaluation, Authorisation and The applicable exhaust emission requirements
Restriction of Chemical substances. are fulfilled by the intended usage and mainte‐
For information on compliance with the REACH nance described in this instruction manual. The
regulation see www.stihl.com/reach. type approval expires if the engine is modified in
any way.
19.6 Exhaust Emissions
The CO2value measured in the EU type approval
procedure is specified at www.stihl.com/co2.
20 Bar and Chain Combinations
20.1 STIHL MS 881 Chainsaw
Pitch Drive link Length Guide bar Number of Number of Saw chain
gauge/groove teeth, drive links
width sprocket
nose
53 cm Duromatic - 68
Rollomatic ES 12
63 cm 80
Duromatic -
46 RM (Type
Rollomatic ES 12 3668)
.404“ 1.6 mm 75 cm 91
Duromatic - 46 RS (Type
3946)
Rollomatic ES 12 108
90 cm
Duromatic - 104
105 cm Rollomatic ES 12 123
The cutting length of a guide bar depends on the chainsaw and the saw chain being used. The actual
cutting length of a guide bar may be less than the specified length.

21 Spare Parts and Accesso‐ 22 Disposal

ries 22.1 Disposing of Chainsaw
21.1 Spare parts and accessories Information on disposal is available from STIHL
These symbols indicate original STIHL servicing dealers.
spare parts and original STIHL acces‐ ► Dispose of the chainsaw, guide bar, saw
sories. chain, fuel mix, gasoline, two-stroke engine oil,
STIHL recommends the use of original STIHL accessories and packaging in accordance with
spare parts and accessories. local regulations and environmental require‐
ments.
Despite ongoing market observation, STIHL is
unable to judge the reliability, safety and suitabil‐ 23 EC Declaration of Con‐
ity of other manufacturers' spare parts and
accessories; accordingly, STIHL cannot warrant formity
for the use of those parts. 23.1 STIHL MS 881 Chainsaw
Original STIHL spare parts and original STIHL
ANDREAS STIHL AG & Co. KG
accessories are available from STIHL dealers.
Badstraße 115
D-71336 Waiblingen
Germany

0458-890-8321-B. VA0.A21. 29
English 23 EC Declaration of Conformity

declares under our sole responsibility that

– Category: chainsaw
– manufacturer's brand: STIHL
– Model: MS 881
– serial number: 1124
– Displacement: 121.6 cm³
conforms to the relevant provisions of Directives
2011/65/EU, 2006/42/EC, 2014/30/EU and
2000/14/EC and has been developed and manu‐
factured in compliance with the following stand‐
ards in the versions valid on the date of produc‐
tion: EN ISO 11681‑1, EN 55012 and
EN 61000‑6‑1.
The EC type examination pursuant to Directive
2006/42/EC Art. 12.3(b) was carried out by
DPLF, Deutsche Prüf- und Zertifizierungsstelle
für Land- und Forsttechnik GbR (NB 0363),
Spremberger Straße 1, 64823 Groß‑Umstadt,
Germany
– Certification number K-EG- 2019/9227
The measured and guaranteed sound power lev‐
els were determined according to Directive
2000/14/EC, Annex V, using the ISO 9207
standard.
– Measured sound power level: 120 dB(A)
– Guaranteed sound power level: 122 dB(A)
The technical documents are stored at
ANDREAS STIHL AG & Co. KG Produktzulas‐
sung.
The year of manufacture and serial number are
applied to the chainsaw.
Done at Waiblingen, 10.06.2020
ANDREAS STIHL AG & Co. KG

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

30 0458-890-8321-B. VA0.A21.
23 EC Declaration of Conformity English

0458-890-8321-B. VA0.A21. 31
 *04588908321B*
0458-890-8321-B

www.stihl.com

*04588908321B*
0458-890-8321-B