Stihl MS 194 T User manual

STIHL MS 194 T
Instruction Manual2 - 26

Contents
1 Introduction................................................. 2
2 Guide to Using this Manual.........................2
3 Overview..................................................... 2
4 Safety Precautions......................................4
5 Preparing the Saw for Operation.............. 10
6 Assembling the Saw................................. 10
7 Engaging and Disengaging the Chain Brake
.................................................................. 12
8 Mixing Fuel and Refueling the Chainsaw..12
9 Starting and Stopping the Engine............. 14
10 Checking the Saw..................................... 15
11 Operating the Saw.................................... 17
12 After Finishing Work..................................19
13 Transporting..............................................19
14 Storing.......................................................19
15 Cleaning....................................................19
16 Maintenance............................................. 21
17 Repairing...................................................22
18 Troubleshooting........................................ 22
19 Specifications............................................24
20 Bar and Chain Combinations.................... 25
21 Spare Parts and Accessories....................25
22 Disposal.................................................... 25
23 EC Declaration of Conformity................... 26
1 Introduction
Dear Customer,
Thank you for choosing STIHL. We develop and
manufacture our quality products to meet our
customers’ requirements. The products are
designed for reliability even under extreme con‐
ditions.
STIHL also stands for premium service quality.
Our dealers guarantee competent advice and
instruction as well as comprehensive service
support.
STIHL expressly commit themselves to a sus‐
tainable and responsible handling of natural
resources. This user manual is intended to help
you use your STIHL product safely and in an
environmentally friendly manner over a long
service life.
We thank you for your confidence in us and hope
you will enjoy working with your STIHL product.
Dr. Nikolas Stihl
IMPORTANT! READ BEFORE USING AND
KEEP IN A SAFE PLACE FOR REFERENCE.
2 Guide to Using this Manual
2.1 Symbols used with warnings in
the text
WARNING
■ This symbol indicates dangers that can cause
serious injuries or death.
► The measures indicated can avoid serious
injuries or death.
NOTICE
■ This symbol indicates dangers that can cause
damage to property.
► The measures indicated can avoid damage
to property.
2.2 Symbols in Text
This symbol refers to a chapter in this
instruction manual.
3 Overview
3.1 Chainsaw
3
8
76
54
12
13
#
9
2
14 15
16
20
21
25
28
27
26
24 23 22
17
18
19
11
10
1
0000-GXX-7572-A0
1 Carburetor Adjusting Screws
For tuning the carburetor.
English
2 0458-568-8321-B
© ANDREAS STIHL AG & Co. KG 2021
0458-568-8321-B. VA0.C21.
Printed on chlorine-free paper Printing inks contain vegetable oils, paper can be recycled.
Translation of Original Instruction Manual 0000008722_005_GB

2 Top Handle
For operating, holding, controlling and carry‐
ing the chainsaw.
3 Spiked Bumper
Toothed stop for holding saw steady against
wood while cutting.
4 Guide Bar
Supports and guides the saw chain.
5 Saw Chain
Cuts the wood.
6 Tensioning Screw
Adjusts chain tension.
7 Chain Sprocket
Toothed wheel that drives the chain.
8 Muffler with Spark Arresting Screen
Reduces chainsaw noise emissions.
9 Chain Sprocket Cover
Covers the chain sprocket and secures the
guide bar to the chainsaw.
10 Nut
Secures chain sprocket cover to chainsaw.
11 Chain Catcher
Reduces risk of operator contact with the
chain if it comes off the bar or breaks.
12 Front Hand Guard
Helps protect operator’s left hand from con‐
tact with the saw chain, serves to engage the
chain brake and activates the chain brake by
inertia in certain kickback situations.
13 Master Control Lever
For starting, running and stopping the engine.
14 Throttle Lever
Controls engine speed.
15 Throttle Trigger Lockout
Unlocks the throttle trigger.
16 Shroud
Covers the engine.
17 Shroud Lock
Secures shroud to chainsaw
18 Air filter
Filters the air entering the engine.
19 Ring
For hanging up the saw while working in the
tree.
20 Spark Plug Boot
Connects ignition lead to spark plug
21 Spark Plug
Ignites fuel-air mixture in the engine.
22 Manual Fuel Pump
Eases engine starts.
23 Choke Lever
Enriches mixture for engine starts.
24 Starter Grip
Serves to crank the engine.
25 Handlebar
For holding and controlling the chainsaw.
26 Oil Tank Cap
Closes the oil tank.
27 Fuel Tank Cap
Closes the fuel tank.
28 Chain Scabbard
Helps protect user from contact with saw
chain.
# Serial Number
3.2 Symbols
Meanings of symbols that may be on the chain‐
saw:
This symbol marks the fuel tank.
This symbol marks the chain oil tank.
The chain brake is engaged or disen‐
gaged in this direction.
This symbol shows the direction of
rotation of the chain.
Rotate in this direction to increase chain
tension.
This symbol denotes the manual fuel
pump.
Master Control lever is moved in this direc‐
tion to stop the engine.
Master Control lever is moved to this posi‐
tion to stop the engine.
Engine is operated with the Master Control
lever in this position.
Engine is started with the Master Control
lever in this position.
Engine is made ready for start with the
choke lever in this position.
Engine is started with the choke lever in
this position.
L
W
A
Guaranteed sound power level accord‐
ing to directive 2000/14/EC in dB(A) in
order to make sound emissions of
products comparable.
3 Overview English
0458-568-8321-B 3

4 Safety Precautions
4.1 Warning Symbols
Meanings of warning signs on the chainsaw:
Observe safety notices and take the
necessary precautions.
Read, understand and save the
instruction manual.
Wear safety glasses, hearing protec‐
tion and a hard hat.
Wear long trousers with cut-retardant
inserts and cut-retardant sleeves on
both arms.
Hold the saw firmly with both hands.
Observe safety notices on kickback
and take the necessary precautions.
Only persons who have been
trained in the use of a tree
service chainsaw may use this
chainsaw.
4.2 Intended Use
The STIHL MSA 194 T tree service chainsaw is
designed for tree surgery work and cutting in the
crown of the standing tree.
The chainsaw must not be used for cutting work
on the ground.
WARNING
■Using the chainsaw for purposes for which it is
not designed may result in serious or fatal inju‐
ries and damage to property.
►Use the chainsaw as described in this
instruction manual.
4.3 The Operator
WARNING
■Persons who have not been trained in tree
surgery and maintenance techniques with a
tree service chainsaw cannot recognize or
assess the dangers of the chainsaw. The user
or other persons may sustain serious or fatal
injuries.
► Read, understand and save the
instruction manual.
► Only persons who have been trained
in the use of a tree service chainsaw
may use this chainsaw.
► If the chainsaw is passed on to another per‐
son: Always give them the instruction man‐
ual.
►Make sure the user meets the following
requirements:
–The user must be rested.
–The user must be in good physical con‐
dition and mental health to operate and
work with the chainsaw.
–The user is able to recognize and
assess the risks involved in using the
chainsaw.
–The user must be of legal age or is
being trained in a trade under supervi‐
sion in accordance with national rules
and regulations.
–The user has received instruction from a
STIHL servicing dealer or other experi‐
enced user before working with the
chainsaw for the first time.
–The user must not be under the influ‐
ence of alcohol, medication or drugs.
► If you have any queries: Contact a STIHL
servicing dealer for assistance.
■ The chainsaw’s ignition system produces an
electromagnetic field. This field may interfere
with some pacemakers. This can result in seri‐
ous or fatal injuries.
►If the user has a pacemaker: Make sure the
pacemaker is not affected.
4.4 Clothing and equipment
WARNING
■Long hair may be pulled into the chainsaw
while working. This may result in serious injury
to the user.
►Tie up and confine long hair above your
shoulders.
■ Objects can be thrown at high speed during
operation. This may result in injury to the user.
► Wear close-fitting safety glasses.
Suitable safety glasses are tested in
accordance with EN 166 or national
regulations and available commer‐
cially with the corresponding mark‐
ing.
►STIHL recommends wearing a face mask.
► Wear a long-sleeved, close fitting top.
English 4 Safety Precautions
4 0458-568-8321-B

■ Noise is generated during operation. Noise
can damage your hearing.
► Wear ear protection.
■ Falling objects can cause head injuries.
► If objects are likely to fall while work‐
ing: wear a hard hat.
■ Dust can be whipped up during operation:
Whipped up dust can damage the respiratory
passages and cause allergic reactions.
►If dust is whipped up or forms a cloud:
Wear a dust respirator mask.
■ Unsuitable clothing can snag on wood or
scrub and may become caught in the chain
saw. Users not wearing suitable clothing are at
risk of serious injury.
►Wear close-fitting clothing.
► Remove scarves and jewelry.
■ The user may come into contact with the mov‐
ing saw chain while working. This may result
in serious injury to the user.
► Wear long trousers with cut-retard‐
ant inserts and cut-retardant sleeves
on both arms.
■ The user may cut himself or herself on wood
while working. The user may come into con‐
tact with the saw chain during cleaning or
servicing. This may result in injury to the user.
►Wear work gloves made from resistant
material.
■ Wearing unsuitable footwear may cause the
user to slip. If the user comes into contact with
the moving saw chain, he or she may suffer
cuts. This may result in injury to the user.
►Wear chainsaw boots with cut protection.
■ When working in a tree there is risk of the
operator falling. This may result in serious or
fatal injury to the user.
►Use personal fall protection equipment.
4.5 Work Area and Surroundings
WARNING
■Bystanders, children and animals are not
aware of the dangers of the chainsaw or
thrown objects. Innocent bystanders, children
and animals may be seriously injured and
damage to property may occur.
►Keep bystanders, children and animals
away from the work area.
► Do not leave the chainsaw unattended.
► Make sure that children cannot play with
the chainsaw.
■ Hot exhaust gas is emitted through the muffler
while the engine is running. Hot exhaust gas
can ignite easily flammable materials and
cause a fire.
►Keep exhaust gas well away from easily
flammable materials.
4.6 Safe Condition
4.6.1 Chainsaw
The chainsaw is in a safe condition if the follow‐
ing points are observed:
–The chainsaw is not damaged.
–There is no fuel leaking from the chainsaw.
–The fuel tank and oil tank caps are closed.
–The chainsaw is clean.
–The chain catcher is fitted and undamaged.
–The chain brake is operating properly.
–The controls function properly and have not
been modified.
–The chain lubrication is operating properly.
–Wear marks on the chain sprocket are not
deeper than 0.5 mm.
–A combination of guide bar and saw chain rec‐
ommended in this User Manual is mounted.
–The guide bar and saw chain are properly
mounted.
–The saw chain is properly tensioned.
–Only original STIHL accessories designed for
this chainsaw model are fitted.
–The accessories are correctly attached.
WARNING
■If not in safe condition, components may no
longer operate correctly, safety devices may
be disabled and fuel leakage may occur. This
may result in serous or fatal injury to people.
►Work only with an undamaged chainsaw.
► If fuel is leaking from the chainsaw: Do not
use the chainsaw and contact a STIHL
dealer for assistance.
►Close the fuel tank and oil tank caps.
► If the chainsaw is dirty: Clean the chainsaw.
► Work only with property fitted and undam‐
aged chain catcher.
► Never modify your chainsaw. Exception:
Mounting a combination of guide bar and
saw chain recommended in this User Man‐
ual.
►If the controls do not function properly: Do
not use your chainsaw.
► Only fit original STIHL accessories
designed for this chainsaw model.
4 Safety Precautions English
0458-568-8321-B 5

► Mount the guide bar and saw chain as
described in this User Manual.
► Attach accessories as described in this
User Manual or in the User Manual for the
accessories.
►Never insert objects in the chainsaw’s
openings.
► Replace worn or damaged labels.
► If you have any doubts, be sure to consult a
STIHL dealer.
4.6.2 Guide Bar
The guide bar is in a safe condition if the follow‐
ing points are observed:
–Guide bar is not damaged.
–Guide bar is not deformed.
–The minimum groove depth is maintained,
19.3.
–Bar rails are free from burrs.
–Bar groove is not pinched or splayed.
WARNING
■ If the guide bar is not in a safe condition, it can
no longer support and guide the saw chain
properly. The rotating saw chain can jump off
the guide bar. This can result in serious or
fatal injuries.
►Work only with an undamaged guide bar.
► If the groove depth is less than the mini‐
mum depth: Mount a new guide bar.
► Deburr the guide bar every week.
► If you have any queries: Contact your
STIHL servicing dealer.
4.6.3 Saw Chain
The saw chain is in a safe condition if the follow‐
ing points are observed:
–Chain is not damaged.
–Chain is properly sharpened.
–The service marks on the cutters are still visi‐
ble.
WARNING
■If components do not comply with safety
requirements, they will no longer function
properly and safety devices may be rendered
inoperative. This can result in serious or fatal
injuries.
►Work only with an undamaged saw chain.
► Sharpen the chain properly.
► If you have any queries: Contact your
STIHL servicing dealer for assistance.
4.7 Fuel Mixture and Refueling
WARNING
■This chainsaw requires a fuel mixture of gaso‐
line and two-stroke engine oil. Fuel mixture
and gasoline are extremely flammable. If fuel
mixture or gasoline make contact with open
fire or hot objects, they can cause a fire or
explosion. This can result in serious or fatal
injuries and damage to property.
►Protect fuel mixture and gasoline from heat
and fire.
► Do not spill fuel mixture and gasoline.
► If fuel has been spilled: Wipe up the fuel
with a cloth and do not attempt to start the
engine until all parts of the saw and the
area around it are dry.
►Do not smoke.
► Never refuel near a fire.
► Shut off the engine and allow it to cool
down before refueling.
► Start the engine at least 3 meters from the
fueling spot, outdoors only.
■ Inhaling fuel fumes and gasoline fumes can
have toxic effects.
► Avoid inhaling fuel fumes or gasoline
fumes.
► Refuel in a well-ventilated location.
■ The chainsaw becomes hot during operation,
or in a very hot environment. Depending on
the type of fuel, altitude, ambient temperature
and the temperature of the saw, the fuel
expands and can cause a pressure build-up in
the tank. Fuel may escape as a spray and
ignite when the fuel tank cap is opened. This
can result in serious injuries and damage to
property.
► Allow the saw to cool down before opening
the tank cap.
► Open the tank cap slowly in stages.
■ Clothing that has been in contact with fuel or
gasoline is more easily flammable. This can
result in serious or fatal injuries and damage
to property.
►If your clothing comes into contact with fuel
or gasoline: Change your clothing.
■ Fuel mix, gasoline and two-stroke engine oil
can harm the environment.
► Do not spill fuel, gasoline or two-stroke
engine oil.
► Dispose of fuel mix, gasoline and two-
stroke engine oil in accordance with local
regulations and environmental require‐
ments.
English 4 Safety Precautions
6 0458-568-8321-B

■ Fuel, gasoline or two-stroke engine oil can
cause irritation if they come into direct contact
with the skin or eyes.
►Avoid contact with fuel, gasoline and two-
stroke engine oil.
► In case of contact with the skin: Wash
affected areas with plenty of water and
soap.
►In case of contact with the eyes: Rinse eyes
with plenty of water for at least 15 minutes
and seek medical advice.
■The saw’s ignition system produces sparks.
Unconfined sparks may cause a fire or an
explosion in an easily combustible or explo‐
sive environment. This can result in serious or
fatal injuries and damage to property.
►Use the spark plugs described in this
instruction manual.
► Insert and tighten down the spark plug.
► Connect the spark plug boot and press it
down firmly.
■ The saw can be damaged if it is run on a fuel
mixture consisting of unsuitable gasoline or an
unsuitable two-stroke engine oil or if an incor‐
rect mix ratio of gasoline and two-stroke
engine oil is used.
►Mix the fuel as described in this instruction
manual.
■ The mixture of gasoline and two-stroke engine
oil can separate if it is stored for a long period.
The saw can be damaged if it is used with a
fuel mix that has separated.
►Before refueling the saw: Thoroughly mix
the fuel.
► Use a mixture of gasoline and two-stroke
engine oil that is not older than 30 days
(STIHL MotoMix: 2 years).
4.8 Working
4.8.1 Cutting
WARNING
■Always work within calling distance of others
in case help is needed.
► Make sure than persons outside the work
area are within calling distance.
■ If the engine is not started properly, the user
may lose control of the chainsaw. This can
result in serious injuries.
►Start the engine as described in this instruc‐
tion manual.
► If the saw chain is touching the ground or
objects: Do not start the engine.
■ The user cannot concentrate on the work in
certain situations. The user can lose control of
the saw, stumble or fall and be seriously
injured.
► Work calmly and carefully.
► If light and visibility are poor: Do not use
your saw.
► Operate the chainsaw alone.
► Do not work above shoulder height.
► Watch out for obstacles.
► If you begin to feel tired: Take a break.
■ When working in a tree there is risk of the saw
falling to the ground. This can result in serious
injuries and damage to property.
►Secure the chainsaw with a rope tied to the
ring.
■ Exhaust gas is produced when the engine is
running. Breathing in exhaust gas can have
toxic effects.
►Avoid inhaling exhaust gas.
► Operate the chainsaw is a well ventilated
location.
► In the event of nausea, headache, visual
disturbances, problems with hearing or diz‐
ziness: Stop work and seek medical advice.
■The user’s ability to hear and assess noises is
restricted when wearing hearing protection
with the engine running.
►Work calmly and carefully.
■ The user will not be able to control the chain‐
saw properly if it is operated with the Master
Control lever in position . This can result in
serious injuries.
►Check that the Master Control lever is in
position during operation.
► Start the engine as described in this instruc‐
tion manual.
■ Do not accelerate the engine with the chain
brake engaged since this can damage the
chain brake.
►Disengage the chain brake before you start
cutting.
■ The rotating saw chain can cut the operator.
This can result in serious injuries.
► Do not touch the rotating saw chain.
► If the saw chain is blocked by an object:
Shut off the engine and engage the chain
brake. Then remove the object causing the
blockage.
■The rotating chain becomes hot and expands.
If the chain is not lubricated sufficiently or not
re-tensioned at regular intervals, it may come
off the guide bar or break. This can result in
serious injuries and damage to property.
►Use special chain oil.
4 Safety Precautions English
0458-568-8321-B 7

► Check oil level in tank regularly during cut‐
ting work. Before the oil tank runs empty:
Fill up with chain oil.
►Check chain tension regularly during cutting
work. If chain tension is insufficient: Ten‐
sion the chain.
■If the behavior of the saw changes during
operation or feels unusual, it may no longer be
in a safe condition. This can result in serious
injuries and damage to property.
►Stop work and contact your STIHL dealer
for assistance.
■ Saw vibrations may occur during operation.
► Wear gloves.
► Take regular breaks.
► If signs of circulation problems occur: Seek
medical advice.
■ Sparks may occur if the rotating chain makes
contact with a hard object. Sparks may cause
a fire in an easily combustible location. This
can result in serious or fatal injuries and dam‐
age to property.
►Do not work in an easily combustible loca‐
tion.
■ Note that the saw chain continues to rotate for
a short period after you release the trigger.
The rotating saw chain can cut the user. This
can result in serious injuries.
►Wait for the chain to come to a standstill.
WARNING
B
2
1
0000-GXX-8685-A0
A
■The guide bar can be pinched when cutting
wood that is under tension. The user can lose
control of the saw and be seriously injured.
►Make a relieving cut (1) in the compression
side (A) first, then perform bucking cut (2),
offset in direction of trunk, at the tension
side (B).
4.8.2 Felling
WARNING
■Inexperienced users cannot assess the dan‐
gers of felling a tree. This can result in serious
or fatal injuries and damage to property.
►If you have any queries: Do not fell the tree
yourself.
■ Parts of the tree being removed 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 part of the tree being removed
falls is clear.
►Do not allow bystanders, children or ani‐
mals within 2.5 tree lengths of the work
area.
4.9 Reactive Forces
4.9.1 Kickback
0000-GXX-7574-A0
Kickback can be caused for the following rea‐
sons:
–The rotating saw chain in the upper quadrant
of the bar nose makes contact with a hard
object and is suddenly braked.
–The rotating saw chain is pinched at the bar
nose.
The chain brake cannot prevent kickback.
WARNING
0000-GXX-7575-A0
■If kickback occurs, the saw can be thrown up
in the direction of the operator. Due to the spe‐
cial handle design (closely spaced handles)
there is a risk of the operator losing control of
the chainsaw and sustaining serious or fatal
injuries.
► Hold the saw firmly with both hands.
► Hold the saw firmly with both hands.
► Always keep your body out of the plane of
the cutting attachment.
English 4 Safety Precautions
8 0458-568-8321-B

► Use the working techniques described in
this instruction manual.
► Do not cut with the upper quadrant of the
bar nose.
► Always cut with a properly sharpened and
tensioned saw chain.
► Use a reduced kickback saw chain.
► Use a guide bar with a narrow radius nose.
► Always cut with the chain running at full
speed.
4.9.2 Pull-in
0000-GXX-1348-A0
The saw is pulled away from the operator when
the bottom of the bar is used for cutting.
WARNING
■ If the rotating chain makes contact with a hard
object and is suddenly pinched, the saw is
abruptly jerked away from the operator. The
operator can lose control of the saw and be
seriously or fatally injured.
►Hold the saw firmly with both hands.
► Operate the saw as described in this
instruction manual.
► Keep the guide bar straight in the cut.
► Apply the spiked bumper properly.
► Always cut with the chain running at full
speed.
4.9.3 Pushback
0000-GXX-1349-A0
The saw is pushed back toward the operator
when the top of the bar is used for cutting.
WARNING
■If the rotating chain makes contact with a hard
object and is suddenly pinched, the saw can
be abruptly pushed back toward the operator.
The operator can lose control of the saw and
be seriously or fatally injured.
►Hold the saw firmly with both hands.
► Operate the saw as described in this
instruction manual.
► Keep the guide bar straight in the cut.
► Always cut with the chain running at full
speed.
4.10 Transporting
WARNING
■ The saw may turn over or shift during trans‐
port. This can result in serious injuries and
damage to property.
►Shut off the engine.
► Engage the chain brake.
► Fit the scabbard so that it completely cov‐
ers the guide bar.
► Secure the chainsaw with lashing straps,
belts or a net to prevent it turning over and
moving.
0000-GXX-7576-A1
■The muffler and engine may be hot after a
period of operation. There is a risk of burn
injuries.
►Carry the saw by holding the top handle in
your left hand with the guide bar pointing to
the rear.
4.11 Storing
WARNING
■Children are not aware of and cannot assess
the dangers of a chainsaw and can be seri‐
ously injured.
►Shut off the engine.
► Engage the chain brake.
► Fit the scabbard so that it completely cov‐
ers the guide bar.
► Store the saw out of the reach of children.
■ Dampness can corrode the electrical contacts
on the saw and metal components. This can
damage the saw.
►Store the saw in a clean and dry condition.
4 Safety Precautions English
0458-568-8321-B 9

4.12 Cleaning, Maintenance and
Repair
WARNING
■The saw chain can start up unintentionally if
the engine is running during cleaning, mainte‐
nance or repair operations. This may result in
serious injury to people and damage to prop‐
erty.
►Shut off the engine.
► Engage the chain brake.
■ The muffler and engine may be hot after a
period of operation. This can result in burn
injuries.
►Wait until the muffler and engine cool down.
■ Aggressive cleaning agents, a water jet or
pointed objects can damage the chainsaw,
guide bar and saw chain. If the chainsaw,
guide bar or saw chain are not cleaned cor‐
rectly, components may no longer function
properly or safety devices may be rendered
inoperative. They may cause serious injury to
persons.
► Clean the chainsaw, guide bar and saw
chain as described in this user manual.
■ If the chainsaw is not maintained as described
in this user manual, components may no lon‐
ger function properly or safety devices may be
rendered inoperative. This may result in
serous or fatal injury to people.
►Service or repair the chainsaw as described
in this user manual.
■ If the guide bar and saw chain are not main‐
tained or repaired as described in this user
manual, components may no longer function
properly or safety devices may be rendered
inoperative. They may cause serious injury to
persons.
►Service or repair the guide bar and saw
chain as described in this User Manual.
■ The user may be cut by the sharp cutters
while cleaning or servicing the saw chain. This
may result in injury to the user.
►Wear work gloves made from resistant
material.
5 Preparing the Saw for
Operation
5.1 Preparing the Saw for Opera‐
tion
Perform the following steps before starting work:
► Make sure the following components are in a
safe condition:
–Chainsaw, 4.6.1.
–Guide bar, 4.6.2.
–Saw chain, 4.6.3.
►Clean the saw, 15.1.
►Mount the bar and chain, 6.1.1.
►Tension the saw chain, 6.2.
►Fill up with chain oil, 6.3.
►Check the chain brake, 10.4.
►Refuel the saw, 8.2.
►Check the controls, 10.5.
►Check chain lubrication, 10.6.
► If you cannot carry out these steps: Do not use
your chainsaw and contact your STIHL servic‐
ing dealer for assistance.
6 Assembling the Saw
6.1 Mounting and Removing the
Bar and Chain
6.1.1 Mounting the bar and chain
The bar and chain combinations that can be
used with the chain sprocket are listed in the
specifications, 20.1.
► Shut off the engine and engage the chain
brake.
3
1
2
4
0000-GXX-7577-A0
► Rotate the nut (1) counterclockwise until the
chain sprocket cover (2) can be removed.
► Remove the chain sprocket cover (2).
► Turn the tensioning screw (3) counterclock‐
wise until the tensioner slide (4) butts against
the left end of the housing.
78
5
6
0000-GXX-7553-A0
English 5 Preparing the Saw for Operation
10 0458-568-8321-B

► Fit the guide bar and chain on the saw and
check the following points:
–Collar stud (5) is located in slot in tail of
guide bar (6).
–Peg of tensioner slide (4) engages hole (8)
in guide bar (6).
The guide bar (6) may be either way round. The
logo on the guide bar (6) may also be upside
down.
7
6
0000-GXX-7569-A0
► Fit the chain on the chain sprocket (7) so that
the chain’s drive links mesh with the sprock‐
et’s teeth.
► Fit the chain in the bar groove so that the
arrows on the tie straps on the top of the bar
point in the direction of rotation.
3
6
0000-GXX-7554-A0
► Turn the tensioning screw (3) clockwise until
the chain fits snugly against the bar. Make
sure the drive link tangs engage the bar
groove.
The guide bar (6) and chain are seated
against the saw.
► Fit the sprocket cover (2) so that it is flush with
the saw.
► Fit and tighten down the nut (1).
6.1.2 Removing the bar and chain
► Shut off the engine and engage the chain
brake.
► Rotate the nut counterclockwise until the chain
sprocket cover can be removed.
► Remove the sprocket cover.
► Turn the tensioning screw counterclockwise as
far as stop.
The chain is now slack.
► Remove the bar and chain.
6.2 Tensioning the Saw Chain
The saw chain expands or contracts during cut‐
ting work. Chain tension changes as a result.
Check chain tension regularly during operation
and readjust if necessary.
► Shut off the engine and engage the chain
brake.
2
1
0000-GXX-7555-A0
a
► Loosen the nut (1).
► Disengage the chain brake.
► Hold the bar nose up and turn the tensioning
screw (2) clockwise until the following points
apply:
–Chain sag ‘a’ in the center of the bar is 1 - 2
mm.
–The chain can still be pulled easily along the
bar with two fingers.
► Keep holding the bar nose up and tighten
down the nut (1) firmly.
► If chain sag ‘a’ in the center of the bar is not 1
- 2 mm: Readjust chain tension.
6.3 Filling Up with Saw Chain Oil
The saw chain oil lubricates and cools the rotat‐
ing chain.
STIHL recommends you use a STIHL saw chain
oil or an equivalent chain oil approved for chain‐
saws.
► Shut off the engine and engage the chain
brake.
► Place your chainsaw on a level surface so that
the oil tank cap faces up.
► Use a damp cloth to clean the oil tank cap and
the area around it.
0000-GXX-2930-A0
► Swing the grip on the oil tank cap to the verti‐
cal position.
6 Assembling the Saw English
0458-568-8321-B 11

► Turn the oil tank cap counterclockwise as far
as it will go.
► Remove the oil tank cap.
► Fill up with saw chain oil, taking care not to
spill any oil and not to overfill the tank.
► If the grip on the oil tank cap has dropped into
the closed position: Raise the grip until it is
vertical.
23
1
0000-GXX-2931-A0
1
► Place the oil tank cap in the filler opening so
that mark (1) lines up with mark (2).
► Press the oil tank cap down and rotate it clock‐
wise as far as it will go.
The oil tank cap snaps into place. The mark
(1) points to mark (3).
► Check to see if the oil tank cap can be pulled
upwards and off.
► If the oil tank cap cannot be pulled upwards
and off: Fold down the grip on the oil tank cap.
The oil tank is closed.
If the oil tank cap can be pulled upwards and off,
perform the following steps:
► Place the oil tank cap in the filler opening – in
any position.
1
0000-GXX-3135-A0
2
► Press the oil tank cap down and rotate it clock‐
wise as far as it will go.
► Press the oil tank cap down and rotate it coun‐
terclockwise until mark (1) points to mark (2).
► Now try again to close the oil tank.
► If the oil tank still cannot be closed properly:
Do not use the chainsaw and contact a STIHL
dealer for assistance.
The chainsaw is not in a safe condition.
7 Engaging and Disengaging
the Chain Brake
7.1 Engaging the Chain Brake
The saw is equipped with a chain brake.
The chain brake is activated by the inertia of the
front hand guard if the kickback force is high
enough or it can be engaged by the operator.
0000-GXX-7578-A0
► Push the hand guard away from the handlebar
with your left hand.
The hand guard engages with an audible click.
The chain brake is engaged.
7.2 Disengaging the Chain Brake
0000-GXX-7579-A0
► Pull the hand guard back towards the handle
with your left hand.
The hand guard engages with an audible click.
The chain brake is disengaged.
8 Mixing Fuel and Refueling
the Chainsaw
8.1 Mixing Fuel
This chainsaw requires a fuel mixture of gasoline
and two-stroke engine oil in a ratio of 50:1.
STIHL recommends you use STIHL MotoMix.
If you mix the fuel yourself, use only STIHL two-
stroke engine oil or another high-performance
engine oil in accordance with JASO FB, JASO
FC, JASO FD, ISO-L-EGB, ISO-L-EGC or ISO-L-
EGD.
STIHL specifies STIHL HP Ultra two-stroke
engine oil or an equivalent high-performance
English 7 Engaging and Disengaging the Chain Brake
12 0458-568-8321-B

engine oil in order to maintain emission limits
throughout the machine’s service life.
► Make sure that the octane number of the gas‐
oline is at least 90 RON and the ethanol con‐
tent is not more than 10%.
► Make sure the two-stroke engine oil you are
using meets the requirements.
► Depending on the required amount of fuel,
determine the correct amounts of two-stroke
engine oil and gasoline in a mix ratio of 50:1.
Examples for fuel mixes:
–1 liter gasoline, 20 ml two-stroke engine oil
–3 liters gasoline, 60 ml two-stroke engine oil
–5 liters gasoline, 100 ml two-stroke engine
oil
► Pour two-stroke engine oil into a clean
approved fuel canister first and then add gaso‐
line.
► Thoroughly mix the fuel.
8.2 Fueling the Saw
► Shut off the engine and engage the chain
brake.
► Allow chainsaw to cool down.
► Place your chainsaw on a level surface so that
the fuel tank cap faces up.
► Use a damp cloth to clean the tank cap and
the area around it.
► Swing the grip on the fuel tank cap to the verti‐
cal position.
0000-GXX-2934-A1
WARNING
■ The chainsaw becomes hot during operation,
or in a very hot environment. Depending on
the type of fuel, altitude, ambient temperature
and the temperature of the saw, the fuel
expands and can cause a pressure build-up in
the tank. Fuel may escape as a spray and
ignite when the fuel tank cap is opened. This
can result in serious injuries and damage to
property.
► Allow the saw to cool down before opening
the tank cap.
► Open the tank cap slowly in stages.
► Turn the fuel tank cap about 1/8 of a turn
counterclockwise.
If the fuel tank is under pressure, you will hear
pressure being released.
► When the tank is no longer under pressure:
Turn the tank cap counterclockwise until the
marks on the cap and fuel tank are in align‐
ment.
► Remove the fuel tank cap.
NOTICE
■ Bright light, sunlight and extreme tempera‐
tures can cause the fuel mix to separate much
faster. The saw can be damaged if it is used
with a fuel mix that has become separated.
►Thoroughly mix the fuel.
► Do not use fuel mix that has been stored for
more than 30 days.
► Fill the tank to within no more than 15 mm
of the brim, taking care not to spill any fuel.
► If the grip on the fuel tank cap has dropped
into the closed position: Raise the grip until it
is vertical.
23
1
0000-GXX-2935-A1
14
► Place the cap in the filler opening so that mark
(1) lines up with mark (2).
► Press the cap down and rotate it clockwise as
far as stop.
The cap snaps into place. The mark (1) is in
line with mark (4) and points to mark (3).
► Check to see if the fuel tank cap can be pulled
upwards and off.
► If the fuel tank cap cannot be pulled upwards
and off: Fold the grip flush with the top of the
cap.
The fuel tank is closed.
If the fuel tank cap can be pulled upwards and
off, perform the following steps:
► Place the fuel tank cap in the filler opening – in
any position.
8 Mixing Fuel and Refueling the Chainsaw English
0458-568-8321-B 13

0000-GXX-3136-A1
1
2
ABC
► Press the cap down and rotate it clockwise as
far as stop.
► Press the cap down and rotate it counterclock‐
wise until mark (1) points to mark (2).
► Now try again to close the fuel tank.
► If the fuel tank still cannot be closed properly:
Do not use the chainsaw and contact a STIHL
dealer for assistance.
The chainsaw is not in a safe condition.
9 Starting and Stopping the
Engine
9.1 Selecting the correct starting
procedure
When must the engine be prepared for starting?
The engine must be prepared for starting if one
of the following conditions apply:
–The engine is at ambient temperature.
–The engine stopped when accelerated for the
first time.
–The engine stopped because the fuel tank was
empty.
►Prepare engine for start, 9.2 and then start
the engine, 9.3.
When can the engine be started without prepara‐
tion?
The engine can be started without preparation if
it has been running for at least 1 minute and only
shut down for a short work break.
►Starting the engine, 9.3.
9.2 Preparing Engine for Start
► Select the correct starting procedure.
1
2
3
4
5
6
0000-GXX-7580-A0
► Engage the chain brake (1).
► Pull off the chain guard (scabbard).
► Press the manual fuel pump bulb (6) at least
ten times.
► Press down the throttle trigger lockout (3) and
hold it there.
► Pull the throttle trigger (4) and hold it there.
► Move the Master Control lever (2) to posi‐
tion .
► Release the throttle trigger (4) and lockout
lever (5).
►Move the choke lever (5) to position .
0000-GXX-7581-A0
► Stand the saw on a level surface.
► Hold the saw firmly with your right hand on the
top handle – wrap your thumb around the han‐
dle.
► Press the saw against the ground with your
right hand.
► Hold the saw steady with your right knee on
the shroud.
► Pull the starter grip slowly with your left hand
until you feel it engage.
► Pull the starter grip quickly and allow the
starter rope to rewind several times until the
engine fires and stops.
►Move the choke lever (5) to position .
9.3 Starting the Engine
► Select the correct starting procedure.
1
2
3
4
5
6
0000-GXX-7582-A0
► Engage the chain brake (1).
► Pull off the chain guard (scabbard).
►Move the choke lever (5) to position .
► Press down the throttle trigger lockout (3) and
hold it there.
► Pull the throttle trigger (4) and hold it there.
English 9 Starting and Stopping the Engine
14 0458-568-8321-B

► Move the Master Control lever (2) to posi‐
tion .
0000-GXX-7581-A0
► Stand the saw on a level surface.
► Hold the trimmer firmly with your right hand on
the top handle – wrap your thumb around the
handle.
► Press the saw against the ground with your
right hand.
► Hold the saw steady with your right knee on
the shroud.
► Pull the starter grip slowly with your left hand
until you feel it engage.
► Pull the starter grip quickly and allow the
starter rope to rewind several times until the
engine runs.
► Press down the throttle trigger lockout (3) and
hold it there.
► Blip the throttle trigger (4).
The Master Control lever (2) springs to posi‐
tion . The engine runs at idling speed.
NOTICE
■ Do not accelerate the engine with the chain
brake engaged since this can damage the
chain brake.
►Disengage the chain brake before you start
cutting.
► Disengage the chain brake.
Your saw is ready for operation.
► If the saw chain rotates while the engine is
idling: See troubleshooting.
Idle speed adjustment is not correct.
► If the engine does not start: Prepare the
engine for the start and then try again to start
the engine.
9.4 Stopping the engine
2
3
1
0000-GXX-7583-A0
► Release the throttle trigger (3) and lockout
lever (2).
The saw chain stops running.
► Move the Master Control lever (1) to posi‐
tion .
The engine stops and the Master Control lever
(1) springs back to position .
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-7568-A0
► If there are visible wear marks: Do not use the
chainsaw and contact your STIHL servicing
dealer for assistance.
The chain sprocket must be replaced.
10.2 Checking the Guide Bar
► Shut off the engine and engage the chain
brake.
► Remove the chain and guide bar.
0000-GXX-1217-A0
10 Checking the Saw English
0458-568-8321-B 15

► Measure depth of bar groove with scale on
STIHL filing gauge.
► Install a new guide bar if one of the following
points applies:
–Guide bar is damaged.
–Measured bar groove depth is less than
specified minimum depth, 19.3.
–Bar groove is pinched or splayed.
► If you have any queries: Contact your STIHL
servicing dealer for assistance.
10.3 Checking the Saw Chain
► Shut off the engine and engage the chain
brake.
1
0000-GXX-1218-A0
2
► Use a STIHL filing gauge (2) to check the
height of the depth gauges (1). The STIHL fil‐
ing gauge must match the chain pitch.
► If a depth gauge (1) projects from the filing
gauge (2): Lower the depth gauge (1), 16.3.
0000-GXX-1372-A0
1
23
4
► Make sure the service marks (1 to 4) on the
cutters are visible.
► If one of the service marks is not visible on a
cutter: Do not use your chainsaw and contact
your STIHL servicing dealer for assistance.
► Use a STIHL filing gauge to check that a filing
angle of 30° has been maintained on all cut‐
ters. The STIHL filing gauge must match the
chain pitch.
► If a filing angle of 30° has not been main‐
tained: Resharpen the saw chain.
► If you have any queries: Contact your STIHL
servicing dealer for assistance.
10.4 Testing the Chain Brake
► Shut off the engine and engage the chain
brake.
WARNING
■ The chain's cutters are very sharp. There is a
risk of cut injuries.
► Wear work gloves made of durable mate‐
rial.
► Try to pull the chain along the guide bar by
hand.
If the chain cannot be pulled along the bar by
hand, the chain brake is functioning.
► If the chain can be pulled along the bar by
hand: Do not use your chainsaw and contact
your STIHL servicing dealer for assistance.
The chain brake is defective.
10.5 Checking the Controls
Throttle trigger lockout and throttle trigger
► Shut off the engine and engage the chain
brake.
► Attempt to pull the trigger without depressing
the lockout lever.
► If the trigger can be pulled: Do not use the
chainsaw and contact your STIHL servicing
dealer for assistance.
The throttle trigger lockout is defective.
► Press down the throttle trigger lockout and
hold it there.
► Pull the throttle trigger and release it again.
► If the throttle trigger is stiff or does not spring
back to its idle position: Do not use the chain‐
saw and contact your STIHL servicing dealer
for assistance.
The throttle trigger is defective.
Stopping the engine
► Start the engine.
► Move the Master Control lever (1) to posi‐
tion .
The engine stops and the Master Control lever
springs back to position .
► If the engine does not stop:
►Move the choke lever to position .
The engine stops.
► Do not use the chainsaw and contact your
STIHL servicing dealer for assistance.
The Master Control lever is defective.
10.6 Checking Chain Lubrication
► Start the engine and disengage the chain
brake.
► Hold the guide bar over a light surface.
► Open the throttle.
Chain oil is thrown off the chain and is visible
on the light surface. Chain lubrication is oper‐
ating properly.
English 10 Checking the Saw
16 0458-568-8321-B

11 Operating the Saw
11.1 Adjusting Carburetor for Opera‐
tion at High Altitude
If you use the chainsaw at high altitude, the
engine will not deliver optimum power. The car‐
buretor setting can be adjusted to obtain opti‐
mum engine power.
► Start the engine and disengage the chain
brake.
► Warm up the engine by opening and closing
the throttle for about 1 minute.
0000-GXX-3132-A0
H
NOTICE
■ If the chainsaw is again used at a low altitude,
the engine may overheat.
► Carry out the standard setting.
► Rotate the high speed screw H clockwise
until the engine delivers optimum power.
11.2 Adjusting Carburetor for Cut‐
ting at Temperatures Below –
10°C
The engine will not accelerate properly if the
chainsaw is used at temperatures below –10°C.
The carburetor can be adjusted to obtain normal
engine acceleration in such conditions.
► Start the engine and disengage the chain
brake.
► Warm up the engine by opening and closing
the throttle for about 1 minute.
0000-GXX-3131-A0
L
NOTICE
■ Engine power may drop noticeably when the
chainsaw is subsequently used at tempera‐
tures above –10°C.
►Carry out the standard setting.
► Rotate the low speed screw (L) a quarter
turn counterclockwise.
► If the saw chain runs continuously or the
engine stops: Adjust idle speed.
11.3 Holding and Controlling the
Chainsaw
0000-GXX-7585-A0
► Hold and control your saw with your left hand
on the handlebar and your right hand on the
top handle. Wrap thumb of left hand around
the handlebar and thumb of right hand around
the top handle.
WARNING
■ The risk of kickback is increased if you use the
chainsaw with one hand. If kickback occurs,
the saw can be thrown up in the direction of
the operator. The operator can lose control of
the saw and be seriously or fatally injured.
►Do not cut with the upper quadrant of the
bar nose.
► Never support yourself on the limb being
cut.
► Never attempt to hold falling limbs.
The saw may be used with one hand if the fol‐
lowing points apply:
–Two-handed cutting is not possible.
–One hand is required for support during the
cut.
–The saw can be held firmly with one hand.
–All parts of your body are clear of the cutting
attachment.
11 Operating the Saw English
0458-568-8321-B 17

11.4 Cutting
WARNING
■ If kickback occurs, the saw can be thrown up
in the direction of the operator. This can result
in serious or fatal injuries.
►Always cut with the chain running at full
speed.
► Do not cut with the upper quadrant of the
bar nose.
► Begin the cut with the chain running at full
speed and keep the guide bar vertical.
0000-GXX-7586-A0
► Engage the spiked bumper and use it as a ful‐
crum.
► Guide the full width of the bar into the wood
and reposition the spiked bumper as required.
► Take the weight of the saw at the end of the
cut.
11.5 Limbing
► With the chain running a full speed, pivot the
guide bar downward against the limb.
2
1
0000-GXX-C575-A0
3
A
B
► Make a relieving cut (1) in the compression
side (A) first, then perform a bucking (2) cut at
the tension side (B) from above, directly above
the first cut.
► Make the last cut (3) close to the trunk without
damaging the bark.
11.6 Felling
11.6.1 Basic information on felling cut
A
A
B
B
C
C
0000-GXX-A332-A0
A Felling notch
The felling notch determines the direction of
fall.
B Hinge
The hinge controls the part of the tree being
removed as it drops to the ground. The width
of the hinge is 1/10 of the trunk diameter.
C Felling cut
The tree is felled with the felling cut.
11.6.2 Cutting the felling notch
The felling notch determines the direction in
which the part of the tree being removed falls.
Country-specific standards for making the felling
notch must be observed.
90°
0000-GXX-A333-A0
► Position the saw so that the felling notch is at
right angles to the direction of fall.
► Make the horizontal cut.
► Make the angle cut at 45° to the horizontal cut.
11.6.3 Making the felling cut
0000-GXX-A335-A0
► Make horizontal felling cut, taking care not to
cut through the hinge.
English 11 Operating the Saw
18 0458-568-8321-B

► Shout a warning.
► Push the part of the tree being removed down‐
ward over the hinge.
The part of the tree to be removed falls.
12 After Finishing Work
12.1 After Finishing Work
► Shut off the engine and engage the chain
brake.
► Allow chainsaw to cool down.
► If the saw is wet: Allow the saw to dry.
► Clean the saw.
► Clean the air filter.
► Clean the bar and chain.
► Loosen nut on the chain sprocket cover.
► Turn the tensioning screw two full turns coun‐
terclockwise.
The chain is now slack.
► Tighten down the nut on the chain sprocket
cover.
► Fit the scabbard so that it completely covers
the guide bar.
13 Transporting
13.1 Transporting the Chainsaw
► Shut off the engine and engage the chain
brake.
► Fit the scabbard so that it completely covers
the guide bar.
► Carry the saw by holding the top handle in
your left hand with the guide bar pointing to
the rear.
► Transporting the saw in a vehicle: Secure the
saw to prevent turnover and movement.
11
0000-GXX-7588-A0
The chainsaw can be carried by attaching the
ring (1) to your waist belt or a rope.
14 Storing
14.1 Storing the Chainsaw
► Shut off the engine and engage the chain
brake.
► Fit the scabbard so that it completely covers
the guide bar.
► Observe the following points when storing the
saw:
–Saw is out of the reach of children.
–The saw is clean and dry.
15 Cleaning
15.1 Cleaning the Saw
► Shut off the engine and engage the chain
brake.
► Allow chainsaw to cool down.
► Clean the saw with a damp cloth or STIHL
resin solvent.
► Clean cooling air slots with a soft brush.
1
2
0000-GXX-7589-A00000-GXX-7589-A0
► Rotate the shroud lock (1) a half turn counter‐
clockwise.
► Remove the shroud (2).
► Remove the chain sprocket cover.
► Use a soft brush, damp cloth or STIHL resin
solvent to clean the inside of the shroud.
► Clean the area around the sprocket with a
damp cloth or STIHL resin solvent.
► Place the shroud (2) in position.
► Rotate the shroud lock (1) clockwise until you
hear a click.
The shroud lock (1) is secure.
► Fit the chain sprocket cover.
15.2 Cleaning the Bar and Chain
► Shut off the engine and engage the chain
brake.
► Remove the bar and chain.
1
23
3
0000-GXX-7565-A0
► Clean the oil inlet hole (1), oil port (2) and bar
groove (3) with a soft brush or STIHL resin
solvent.
12 After Finishing Work English
0458-568-8321-B 19

► Clean the saw chain with a soft brush or
STIHL resin solvent.
► Mount the bar and chain.
15.3 Cleaning the Spark Plug
► Shut off the engine and engage the chain
brake.
► Allow the chainsaw to cool down.
12
3
0000-GXX-7589-A00000-GXX-7590-A0
► Turn the cover lock (2) counterclockwise 1/2
turn.
► Remove cover (1).
► Pull off the spark plug boot (3).
► If the area around the spark plug is soiled:
Clean it with a cloth.
► Unscrew the spark plug.
► Clean the spark plug with a cloth.
► If the spark plug is corroded: Replace the
spark plug.
3
0000-GXX-7589-A00000-GXX-7591-A0
► Insert and tighten down the spark plug.
► Press the spark plug boot (3) firmly home.
► Fit the cover (1).
► Rotate the shroud lock (2) clockwise until you
hear a click.
The cover lock (2) is secure.
15.4 Cleaning the Air Filter
15.4.1 Cleaning the fabric air filter
► Shut off the engine and engage the chain
brake.
1
2
3
0000-GXX-7589-A00000-GXX-7592-A0
► Rotate the shroud lock (1) a half turn counter‐
clockwise.
► Remove the shroud (2).
► Remove the air filter (3).
► Knock out the filter (3).
► Clean the filter (3) with a soft brush.
► If the filter (3) is damaged. Install a new filter
(3).
► Blow out the filter with compressed air from
the clean air side.
WARNING
■ Cleaning agent may cause irritation if it con‐
tacts the skin or eyes.
► Observe the information supplied with the
cleaning agent.
► Avoid contact with cleaning agents.
► In case of contact with the skin: Wash
affected areas with plenty of water and
soap.
►In case of contact with the eyes: Rinse eyes
with plenty of water for at least 15 minutes
and seek medical advice.
►If the air filter is very dirty:
1
2
3
0000-GXX-7589-A00000-GXX-7593-A0
► Install the filter (3).
► Place the shroud (2) in position.
► Rotate the shroud lock (1) clockwise until you
hear a click.
The shroud lock (1) is secure.
15.4.2 Cleaning the fleece air filter
► Shut off the engine and engage the chain
brake.
English 15 Cleaning
20 0458-568-8321-B