Stihl MSA 300.0 User manual

STIHL MSA 300.0, 300.0 C Instruction Manual
Notice d’emploi

GInstruction Manual
1 - 57
FNotice d’emploi
58 - 122

Original Instruction ManualPrinted on chlorine-free paper
Printing inks contain vegetable oils, paper can be recycled.
© ANDREAS STIHL AG & Co. KG 2021 0458-009-8201-A. VA0.J21. 0000009923_001_GB
0458-009-8201-A
English
1
This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Guide to Using this Manual
. . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.1 Signal Words
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.2 Symbols in Text
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 Main Parts
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.1 Chain Saw and Battery
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.2 Optional Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Safety Symbols on the Products
. . . . . . . . . . . . . . . . . . . . . 5
4.1 Chain Saw
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.2 Battery
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5 IMPORTANT SAFETY INSTRUCTIONS
. . . . . . . . . . . . . 6
5.1 Intended Use
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.2 Operator
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.3 Personal Protective Equipment
. . . . . . . . . . . . . . . . . . . . . . 8
5.4 Chain Saw
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.5 Using the Chain Saw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Kickback and Other Reactive Forces
. . . . . . . . . . . . . . . 15
6.1 Reactive Forces
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2 Kickback
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.3 Pull-in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.4 Pushback
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7 Proper Techniques for Basic Bucking, Limbing,
Pruning and Felling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.1 Intended Uses
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.2 Bucking
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.3 Limbing
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.4 Pruning
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.5 Cutting Logs Under Tension
. . . . . . . . . . . . . . . . . . . . . . . . 24
7.6 Felling
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8 Battery Safety
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.1 Warnings and Instructions
. . . . . . . . . . . . . . . . . . . . . . . . . . 28
9 Maintenance, Repair and Storage
. . . . . . . . . . . . . . . . . . 30
9.1 Warnings and Instructions
. . . . . . . . . . . . . . . . . . . . . . . . . . 30
10 Before Starting Work
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
10.1 Preparing the Chain Saw for Operation
. . . . . . . . . . . . 31
11 Charging the Battery
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
11.1 Setting up the Charger
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
11.2 Charging
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
12 LED Diagnostics
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
12.1 STIHL AP Battery
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
13 Assembling the Chain Saw
. . . . . . . . . . . . . . . . . . . . . . . . . 34
13.1 Cutting Attachment
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
13.2 Mounting and Removing the Guide Bar and
Chain
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
13.3 Tensioning the Chain
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
13.4 Lubricating the Saw Chain and Guide Bar
. . . . . . . . . . 36
14 The Chain Brake
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
14.1 Engaging the Chain Brake
. . . . . . . . . . . . . . . . . . . . . . . . . 38
14.2 Disengaging the Chain Brake
. . . . . . . . . . . . . . . . . . . . . . 38
14.3 Maintaining the Chain Brake
. . . . . . . . . . . . . . . . . . . . . . . 39
15 Inserting and Removing the Battery
. . . . . . . . . . . . . . . . 39
15.1 Inserting the Battery
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
15.2 Removing the Battery
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
16 Switching the Chain Saw On and Off
. . . . . . . . . . . . . . . 40
16.1 Switching On
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
16.2 Switching Off
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
17 Checking the Chain Saw
. . . . . . . . . . . . . . . . . . . . . . . . . . . 41
17.1 Checking the Operation of the Chain Brake
. . . . . . . . 41
17.2 Testing the Controls
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
17.3 Testing Chain Lubrication
. . . . . . . . . . . . . . . . . . . . . . . . . . 42
18 During Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
18.1 Selecting the Power Level
. . . . . . . . . . . . . . . . . . . . . . . . . 42
19 After Finishing Work
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
19.1 Preparing for Transportation or Storage
. . . . . . . . . . . . 43
20 Transporting the Chain Saw and Battery
. . . . . . . . . . . 44
20.1 Chain Saw
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

0458-009-8201-A
2
English 1 Introduction
Thank you for your purchase. The information contained in
this manual will help you receive maximum performance and
satisfaction from your STIHL chain saw and, if followed,
reduce the risk of injury from its use.
SAVE THIS MANUAL!
Have your authorized STIHL servicing dealer show you how
to operate your chain saw. Observe all applicable federal,
state and local safety regulations, standards and
ordinances.
Do not lend or rent your chain saw without this instruction
manual. Allow only persons who have the proper training
and fully understand the information in this manual to
operate the chain saw.
For further information, or if you do not understand any of
the instructions in this manual, please go to www.stihl.ca or
contact your authorized STIHL servicing dealer.
2.1 Signal Words
This manual contains safety information that requires your
special attention. Such information is introduced with the
following symbols and signal words:
20.2 Battery
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
21 Storing the Chain Saw and Battery
. . . . . . . . . . . . . . . . . 44
21.1 Chain Saw
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
21.2 Battery
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
22 Cleaning
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
22.1 Cleaning the Chain Saw and Battery
. . . . . . . . . . . . . . . 45
22.2 Cleaning the Guide Bar and Saw Chain
. . . . . . . . . . . . 45
22.3 Cleaning the Air Filter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
23 Inspection and Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . 47
23.1 Inspecting and Maintaining the Chain Saw
. . . . . . . . . 47
23.2 Inspecting and Maintaining the Chain Sprocket
. . . . . 47
23.3 Inspecting and Maintaining the Guide Bar
. . . . . . . . . . 47
23.4 Inspecting, Maintaining and Sharpening the Saw
Chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
24 Troubleshooting Guide
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
24.1 Chain Saw and Battery
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
25 Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
25.1 STIHL MSA 300, MSA 300 C
. . . . . . . . . . . . . . . . . . . . . . . 54
25.2 Chain Sprockets
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
25.3 Minimum Groove Depth of Guide Bars
. . . . . . . . . . . . . 54
25.4 Depth Gauge Setting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
25.5 Symbols on the Chain Saw
. . . . . . . . . . . . . . . . . . . . . . . . . 54
25.6 Engineering Improvements
. . . . . . . . . . . . . . . . . . . . . . . . . 55
25.7 EMC Compliance Statement for Power Tool and
Charger
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
26 CSA Standard
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
26.1 Chain Saw Class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
26.2 Definition of the Chain Saw Classes according to
CSA Z62.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
27 Combinations of Guide Bars and Saw Chains
. . . . . . 56
27.1 STIHL MSA 300, MSA 300 C
. . . . . . . . . . . . . . . . . . . . . . . 56
28 Replacement Parts and Equipment
. . . . . . . . . . . . . . . . . 57
28.1 Genuine STIHL Replacement Parts
. . . . . . . . . . . . . . . . 57
29 Disposal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
29.1 Disposal of the Power Tool
. . . . . . . . . . . . . . . . . . . . . . . . . 57
29.2 Battery Recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
1 Introduction
Because a chain saw is a high-speed wood-
cutting tool, special safety precautions must be
observed to reduce the risk of personal injury.
Read this instruction manual thoroughly before
use and periodically thereafter. Follow all safety
precautions. Careless or improper use of the
chain saw can cause serious or fatal injury.
2 Guide to Using this Manual

0458-009-8201-A 3
English 3 Main Parts
DANGER
Indicates a hazardous situation that, if not avoided, will
result in death or serious injury.
WARNING
Indicates a hazardous situation that, if not avoided, could
result in death or serious injury.
NOTICE
Indicates a risk of property damage, including damage to the
machine or its individual components.
2.2 Symbols in Text
The following symbol is included to assist you with the use
of the manual:
3.1 Chain Saw and Battery
1 Rear Hand Guard
Helps protect the operator's right hand in the event the
chain breaks or comes off the bar.
2 Bumper Spike
Helps hold the saw steady against the wood during
cutting.
Refers to a designated chapter or sub-chapter in this
instruction manual.
3 Main Parts
31
29 30
11 12 13
23
28
25
22
24
15
14
14
17
16
18
19
20
21
1
8
5
#
#
3
4
9
2
6
7
2726
10
0000099173_001

0458-009-8201-A
4
English 3 Main Parts
3 Saw Chain
Toothed cutting tool consisting of cutters, tie straps and
drive links.
4 Guide Bar
Supports and guides the saw chain.
5 Chain Catcher
Helps contain the saw chain and reduce the risk of
operator contact in the event the chain breaks or comes
off the bar.
6 Tensioning Gear
Shifts the guide bar and tensions or loosens the saw
chain.
7 Chain Sprocket
Drives the saw chain.
8 Chain Sprocket Cover
Covers the chain sprocket.
9Nuts
Tighten the chain sprocket cover.
10 Bumper
For mounting an additional bumper spike.
11 Chain Scabbard
Covers the guide bar and saw chain to reduce the risk of
injury from inadvertent contact during transportation and
storage.
12 Front Hand Guard
Helps protect the operator's left hand from projecting
branches and contact with the saw chain. Serves as the
activation lever for the chain brake.
13 Front Handle
Handle for the operator's left hand.
14 Locking Levers
Secure the battery in the battery compartment.
15 Battery Compartment
Holds the battery.
16 Trigger Switch Lockout
Prevents activation of the trigger switch until depressed.
17 Rear Handle
Handle for the operator's right hand.
18 Trigger Switch
Switches the motor on and off.
19 Retaining Button
For switching the chain saw on.
20 Mounting Recess
Mounting area for a Smart Connector 2 A.
21 Power Level Selector
For selecting the power level.
22 Oil Filler Cap
For closing the oil tank.
23 Gunning Sight
Helps the operator determine the direction of fall when
making a felling notch.
24 Oil Flow Adjusting Screw
For adjusting the amount of chain oil.
25 "STATUS" LED
Indicates the operational status of the chain saw. When
the LED is flashing it indicates that the saw is in standby
mode and ready for use.
26 "TEMPERATURE" LED
Indicates that the chain saw is too hot when illuminated.
27 "CHAIN BRAKE" LED
Indicates that the chain brake is engaged when
illuminated.
28 "POWER LEVEL" LEDs
Indicate the chain saw's power level.
29 Battery
Supplies electrical power to the motor.
30 Battery LEDs
Indicate the battery's state of charge and display error
messages regarding potential malfunctions in the battery
or power tool.

0458-009-8201-A 5
English 4 Safety Symbols on the Products
31 Push Button
Activates the battery's LEDs.
# Rating Plate
Contains electrical information and the product's serial
number.
3.2 Optional Features
Optional features are not available on all models.The chain
saw may be equipped with the following features:
1"CHAINOIL" LED
Indicates that the oil tank is empty or the bar and chain
are not receiving oil when illuminated.
4.1 Chain Saw
The following safety symbols are found on the chain saw:
4.2 Battery
The following safety symbols are found on the AP series
battery:
4 Safety Symbols on the Products
To reduce the risk of injury, follow the specified
safety precautions.
1
0000099174_001
Read and follow all safety precautions in the
instruction manual. Improper use can lead to
serious or fatal personal injury or property
damage.
To reduce the risk of serious personal injury and
hearing loss, always wear proper eye protection,
hearing protection and an approved protective
helmet, @5.3.
To reduce the risk of serious or fatal injuries to
the operator or bystanders from loss of control,
always hold the chain saw firmly with both hands
when you are working, @5.5.2.
To reduce the risk of serious or fatal
injuries to the operator or bystanders
from loss of control, always hold the
chain saw firmly with both hands when
you are working, @5.5.2.
Avoid contact of the bar tip with any object. This
can cause the bar to kick suddenly up and back,
which may result in serious or fatal injury. Always
use two hands to operate the saw, @6.
To reduce the risk of injury or property damage
from unintended activation, remove the battery
any time the saw is not in use, @5.5.
To reduce the risk of injury, follow the specified
safety precautions.

0458-009-8201-A
6
English 5 IMPORTANT SAFETY INSTRUCTIONS
Batteries sold separately.
5.1 Intended Use
WARNING
￭ This chain saw is designed for trees, branches and limbs.
Use of the chain saw for operations different than intended
could result in serious injury or death.
– Cut wood only. For example, do not use chain saw
for cutting metal, plastic or masonry.
– Read and follow the operating and use instructions
in this manual for approved applications and
recommended working techniques.
￭ For cutting larger trees, logs or branches, a more
powerful, faster saw may be necessary to reduce the risk
of binding, stalling or other risks caused by a change in
conditions during longer cutting times.
– Before starting any felling operation, fully charge
your STIHL AP battery.
￭ Before starting any bucking, limbing, pruning or felling
operation, ensure that all necessary cuts can be
completed using the charge remaining in the STIHL
AP series battery. If you are unsure:
– Have multiple charged batteries available for use;
– Select a more powerful chain saw;
– Select a more powerful battery; or
– Consult a reputable tree service professional.
￭ Read and follow the operating and use instructions in this
manual for approved applications and recommended
working techniques.
￭ The saw chain has many sharp cutters. If they contact
your flesh, they will cut you even if the chain is not moving.
– Always wear heavy-duty work gloves when handling
the saw or its chain.
– Keep hands, feet and other parts of your body away
from the chain.
￭ Reactive forces, including kickback, can be dangerous.
– Pay special attention to the sections of this
instruction manual dealing with reactive forces.
￭ Observe all applicable federal, state and local safety
regulations, standards and ordinances.
￭ Improper use could result in personal injury or property
damage, including damage to the chain saw.
– Use the chain saw and battery only as described in
this manual.
– Never attempt to modify or override the chain saw's
controls or safety devices in any way.
– Never use a chain saw that has been modified or
altered from its original design.
Read and follow all safety precautions in the
battery's instruction manual and the manual for
the STIHL tool powered by this battery. Improper
use can lead to serious or fatal personal injury or
property damage.
To reduce the risk of personal injury or property
damage from fire, explosion or burns, including
chemical burns, do not disassemble, crush,
drop, damage or heat above 212 °F (100 °C).
Never expose to fire or incinerate, @8.1.
To reduce the risk of personal injury or property
damage from fire, use and store only within an
ambient temperature range of 14 °F to
122 °F (-10 °C to 50 °C), @8.1.
To reduce the risk of personal injury or property
damage from a short circuit, fire or explosion,
keep dry. Never immerse in water or other
liquids, @8.1.
5 IMPORTANT SAFETY
INSTRUCTIONS

0458-009-8201-A 7
English 5 IMPORTANT SAFETY INSTRUCTIONS
– Be sure to read and follow the warnings and
instructions for your battery and charger before
charging or starting work.
￭ This power tool may be powered by a STIHL AP series
battery. For approved battery types, see chapter @25.
Batteries, chargers and other accessories are sold
separately.
5.2 Operator
WARNING
￭ Working with the chain saw can be strenuous. The
operator must be in good physical condition and mental
health. To reduce the risk of personal injury from fatigue
and loss of control:
– Check with your doctor before using the chain saw if
you have any health condition that may be
aggravated by strenuous work.
– Do not operate the chain saw while under the
influence of any substance (drug, alcohol or
medication, etc.) that might impair vision, balance,
dexterity or judgment.
– Be alert. Do not operate the chain saw when you are
tired. Take a break if you become tired.
– Do not permit minors to use the chain saw.
– Bystanders, especially children, and animals should
not be allowed in the area where the chain saw is in
use.
￭ Prolonged use of a chain saw (or other power tools)
exposing the operator to vibration may produce white
finger disease (Raynaud's phenomenon) or carpal tunnel
syndrome. These conditions reduce the hand's ability to
feel and regulate temperature. They produce numbness
and burning sensations and may also cause nerve and
circulation damage as well as tissue necrosis.
￭ All factors which contribute to white finger disease are not
known. Cold weather, smoking and diseases or physical
conditions that affect blood vessels and blood transport,
as well as high vibration levels and long periods of
exposure to vibration, are mentioned as factors in the
development of white finger disease.
￭ To reduce the risk of white finger disease and carpal
tunnel syndrome:
– Wear gloves while working and keep your hands
warm.
– Keep the chain saw well maintained. An improperly
maintained chain saw or one with loose components
will tend to have higher vibration levels.
– Keep the saw chain sharp. A dull chain will increase
cutting time, and pressing a dull chain through wood
will increase the vibration transmitted to your hands.
– Maintain a firm grip at all times, but do not squeeze
the handles with constant, excessive pressure. Take
frequent breaks.
￭ These precautions do not guarantee that you will not
sustain white finger disease or carpal tunnel syndrome.
– Closely monitor the condition of your hands and
fingers if you are a regular operator.
– Seek medical advice immediately if any of the above
symptoms appear.
￭ According to STIHL's current knowledge, the electric
motor of this chain saw should not interfere with a
pacemaker.
– However, persons with a pacemaker or other
implanted medical device should consult their
physician and device manufacturer before operating
this chain saw.

0458-009-8201-A
8
English 5 IMPORTANT SAFETY INSTRUCTIONS
5.3 Personal Protective Equipment
WARNING
￭ To reduce the risk of personal injury:
– Always wear proper clothing and protective apparel,
including proper eye protection.
￭ Loss of control and severe cut injuries may result if hair,
clothing or apparel make contact with the moving saw
chain or otherwise become entangled in the components
of the saw. To reduce the risk of severe personal injury:
– Wear a long-sleeve shirt or jacket.
– Avoid loose-fitting jackets, scarves, neckties, flared
or cuffed pants, jewelry and any other apparel that
could be caught on branches, brush or the moving
chain.
– Secure hair above shoulder level before starting
work.
￭ To reduce the risk of eye injury:
– To reduce the risk of injury to your face, STIHL
recommends that you also wear a face shield or face
screen over your goggles or protective glasses.
￭ To reduce the risk of head injury from falling branches or
other objects encountered during work:
– Wear an approved protective helmet.
￭ Prolonged exposure to power tool noise may result in
permanent hearing damage. To reduce the risk of hearing
damage:
￭ Good footing is very important. To help maintain a secure
footing and reduce the risk of injury while working:
￭ To improve your grip and help protect your hands:
5.4 Chain Saw
WARNING
￭ To reduce the risk of electric shock:
– Do not immerse the chain saw in water or other
fluids.
– Store the chain saw indoors.
￭ The saw chain has many sharp cutters. Contacting the
cutters may result in serious laceration injuries, even if the
chain is not moving. To reduce the risk of such injuries:
– Keep hands, feet and other parts of your body away
from the chain.
– Wear heavy-duty work gloves when handling the
chain saw or its chain.
– Never touch a moving chain with your hand or any
other part of your body.
– Wear sturdy and snug-fitting clothing that
also allows complete freedom of
movement.
– Wear the type of overalls, long pants or
chaps that contain pads of cut-retardant
material.
– Always wear goggles or close-fitting
protective glasses with adequate top and
side protection that are impact-rated and
marked as complying with CSA Z94.
– Wear sound barriers (ear plugs or ear
muffs).
– Regular operators should have their
hearing checked periodically.
– Be particularly alert and cautious when
using hearing protection. Your ability to
hear shouts, alarms or other audible
warnings is restricted.
– Wear sturdy boots with non-slip soles.
Steel-toed safety boots are
recommended. Do not wear sandals, flip-
flops, open-toed or similar footwear.
– Always wear heavy-duty non-slip work
gloves made of leather or another wear-
resistant material when handling the
chain saw or its chain.

0458-009-8201-A 9
English 5 IMPORTANT SAFETY INSTRUCTIONS
– Cover the guide bar with a chain scabbard before
transporting or storing the chain saw.
￭ Reactive forces, including kickback, can be dangerous.
– Pay special attention to the section of this instruction
manual on "Kickback and Other Reactive Forces,"
@6.
￭ To reduce the risk of personal injury to the operator and
bystanders:
￭ Although certain unauthorized attachments may fit your
STIHL chain saw, their use may be extremely dangerous.
Only attachments supplied by STIHL or expressly
approved by STIHL for use with this specific model are
recommended.
– Use only attachments supplied or expressly
approved by STIHL.
– Never modify this chain saw in any way.
– Never attempt to modify or override the chain saw's
controls or safety devices in any way.
– Never use a chain saw that has been modified or
altered from its original design.
￭ If the chain saw is dropped or subjected to similar heavy
impacts:
– Check that it is undamaged, in good condition and
functioning properly before continuing work.
– Check that the controls and safety devices, including
the chain brake, are working properly, @17.1.
– Check the LEDs for error messages, @24.1.
– Check that the battery has not been damaged.
Never use or charge a malfunctioning, damaged,
cracked, leaking or deformed battery.
– Never work with a damaged or malfunctioning chain
saw or battery. In case of doubt, have the chain saw
and battery checked by your authorized STIHL
servicing dealer.
￭ If the chain saw or battery is damaged, not working
properly, has been left outdoors or dropped into water or
other liquid, its components may no longer function
properly and safety devices may be inoperative. To
reduce the risk of personal injury and property damage:
– Take the chain saw and battery to your authorized
STIHL servicing dealer to be checked before further
operation.
￭ Genuine STIHL replacement parts are specifically
designed to match your chain saw and meet safety and
performance requirements. Use of parts that are not
authorized or approved by STIHL may cause serious or
fatal injury or property damage.
– STIHL recommends that only identical STIHL
replacement parts be used.
5.5 Using the Chain Saw
5.5.1 Before Operation
WARNING
￭ Misuse or unauthorized use may result in personal injury
and property damage.
– Use the chain saw only as described in this
instruction manual.
￭ For proper assembly of the bar and chain:
– Read and follow the instructions on mounting the
guide bar and chain, @13.2.1.
￭ The chain, guide bar and sprocket must match each other
in gauge and pitch. Before mounting or replacing:
– Read the information on guide bar and chain
combinations, @27.
– Read and follow the instructions on kickback and
other reactive forces, @6.
– Always release the trigger switch,
engage the chain brake by moving the
front hand guard to and remove the
battery before assembling, transporting,
adjusting, inspecting, cleaning,
servicing, maintaining or storing the
chain saw, and any other time it is not in
use.

0458-009-8201-A
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English 5 IMPORTANT SAFETY INSTRUCTIONS
– Select the shortest bar that will meet your cutting
needs. Longer bars add weight and may be more
difficult to control.
￭ Proper tension of the chain is extremely important to
maximize cutting performance and reduce the risk of
personal injury from chain breakage, derailment or
reactive forces:
– Never cut with a loose chain. If the chain becomes
loose while cutting, switch off the motor, engage the
chain brake and remove the battery from the chain
saw before tightening the chain. Never attempt to
adjust the chain while the battery is inserted.
– Read and follow the chain tensioning instructions,
@13.3.
– Always make sure the chain sprocket cover is
tightened securely after tensioning the chain in order
to secure the bar. Never start the chain saw with the
chain sprocket cover loose or missing.
– Check chain tension once more after tightening the
chain sprocket cover.
– Check chain tension periodically thereafter at
regular intervals (only after engaging the chain brake
and removing the battery).
￭ Using a chain saw that is modified, damaged, improperly
adjusted or maintained, or not completely and securely
assembled can lead to a malfunction and increase the risk
of serious personal injury or death.
– Never operate a chain saw that is modified,
damaged, improperly maintained or not completely
and securely assembled.
– Always check your chain saw for proper condition
and operation before starting work, particularly the
trigger switch, trigger switch lockout, front hand
guard, chain brake and cutting attachment.
– Ensure that the trigger switch and trigger switch
lockout move freely and always spring back to the
locked position when released. The trigger switch
must not engage until the trigger switch lockout is
depressed.
– Never attempt to modify or override the controls or
safety devices in any way.
– If your saw or any part is damaged or does not
function properly, take it to your authorized STIHL
servicing dealer. Do not use the saw until the
problem has been corrected.
￭ Before inserting the battery:
– Check the contacts in the battery compartment for
corrosion or other foreign matter and keep clean.
– Never insert or use a malfunctioning, damaged,
cracked, leaking or deformed battery.
– Read and follow the instructions on switching on the
chain saw, @16.1.
￭ To help reduce the risk of serious personal injury or death
from unintentional starting:
– Be sure the trigger switch and trigger switch lockout
are in the off position when inserting the battery.
– Avoid contacting the trigger switch lockout and
trigger switch when grasping the rear handle of the
chain saw.
– Release the trigger switch and trigger switch lockout
and engage the chain brake before removing the
battery.
– Never leave the chain saw unattended when the
battery is inserted.
– Never store the battery in the chain saw.
– Remove the battery and engage the
chain brake before assembling,
transporting, adjusting, inspecting,
cleaning, servicing, maintaining or
storing the chain saw, and any time it is
not in use.

0458-009-8201-A 11
English 5 IMPORTANT SAFETY INSTRUCTIONS
￭ Before disengaging the chain brake and switching on your
chain saw, take the following steps to reduce the risk of
personal injury from reactive forces, loss of control or
inadvertent contact with the chain:
– Be sure that the guide bar and chain are clear of you
and all other obstructions and objects, including the
ground.
– Never attempt to switch on the chain saw when the
guide bar is in a cut or kerf. Doing so could lead to
reactive forces and injury.
– Read and follow the instructions on switching on the
chain saw, @16.1.
5.5.2 Holding and Controlling the Chain Saw
WARNING
￭
￭ To reduce the risk of personal injury from unintentional
starting when grasping the rear handle or carrying the
chain saw:
– Wrap the fingers of your right hand tightly around the
rear handle, identified by shading in the
illustration (1). Avoid grasping the chain saw outside
the shaded area or contacting the trigger switch or
retaining button.
￭
￭ To maintain a firm grip and properly control your chain
saw:
– Keep the handles clean and dry at all times. Keep
them free of moisture, pitch, oil, grease and resin.
￭ To reduce the risk of serious or fatal injuries to the
operator or bystanders from loss of control:
– Place your left hand on the front handle and your
right hand on the rear handle (see illustration). Left-
handers must follow these instructions too.
– Wrap your fingers tightly around the handles,
keeping the handles cradled between your thumb
and forefinger.
1
0000085388_002
– Avoid contacting any object with the
upper quadrant of the tip of the guide
bar. It may cause kickback to occur.
– Always hold the chain saw firmly with
both hands when you are working.
0000080803_003

0458-009-8201-A
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English 5 IMPORTANT SAFETY INSTRUCTIONS
– Position the chain saw in such a way that all parts of
your body are clear of the cutting attachment
whenever the battery is inserted. Stand to the left of
the cut while bucking, outside of the cutting plane
(see illustration).
– Read and follow all warnings and instructions in the
chapter Kickback and Other Reactive Forces, @6.
￭ Operating the chain saw with one hand is extremely
dangerous. One-handed operation makes it difficult to
oppose and absorb reactive forces (pushback, pull-in,
kickback) without losing control of the chain saw. It also
makes it difficult to prevent the bar and chain from skating
or bouncing along a limb or log. To reduce the risk of
serious or fatal injury to the operator or bystanders from
loss of control:
￭ To reduce the risk of serious or fatal cut injuries to the
operator or bystanders from loss of control, keep proper
footing and balance at all times:
– Take special care in overgrown or wet terrain and
always watch for hidden obstacles such as tree
stumps, roots, rocks, holes and ditches to avoid
stumbling.
– Be extremely cautious when working on slopes or
uneven ground.
– For better footing, always clear away fallen
branches, scrub and cuttings. Freshly debarked logs
and other material can increase the danger of
slipping, tripping or falling.
– Use extreme caution when cutting small-size brush,
branches and saplings because slender material
may catch the chain and spring toward you or pull
you off balance.
￭ To reduce the risk of injury from loss of control:
– Do not overreach. Keep proper footing and balance
at all times.
– Never switch on the chain saw when the guide bar is
in a cut or kerf. Doing so could lead to reactive forces
and injury. Instead, remove the guide bar from the
cut and re-enter at full speed, taking care to avoid
contacting any object with the tip of the guide bar.
￭ The bumper spike is designed to provide greater control
of the chain saw while cutting. If you work without the
bumper spike, the chain saw may pull you forward
suddenly. This could cause loss of control or, if the tip of
the guide bar strikes an object, kickback.
– Always work with the bumper spike to maintain
better control of the saw.
￭ Applying pressure to the chain saw when reaching the end
of a cut may cause the bar and rotating chain to accelerate
out of the kerf, go out of control and strike the operator or
some other object. To reduce the risk of injury:
– Use caution when approaching the end of a cut.
– Never put pressure on the chain saw when reaching
the end of a cut.
– STIHL recommends that first-time chain saw users
cut logs on a sawhorse.
5.5.3 Working Conditions
WARNING
￭ Operate your chain saw only under good visibility during
favorable daylight conditions.
– Postpone the work if the weather is windy, foggy,
rainy or inclement.
– Never cut near power lines.
– Never attempt to operate the chain saw
with one hand.
– Never work on a ladder, roof, in a tree or
while standing on any other insecure
support.
– Never operate the chain saw above
shoulder height.
0000-GXX-1889-A0

0458-009-8201-A 13
English 5 IMPORTANT SAFETY INSTRUCTIONS
￭ Your chain saw is a one-person machine.
– Do not allow other persons in the general work area.
– Bystanders, especially children, and animals should
not be allowed in the area where it is in use.
– Switch off the motor immediately if you are
approached.
￭ To reduce the risk of injury to bystanders and
unauthorized users:
– Never leave the chain saw unattended when the
battery is inserted.
– Switch off the chain saw, engage the chain brake
and remove the battery during work breaks and any
other time the chain saw is not in use.
￭ Sparks generated from the operation of the chain saw may
be capable of igniting combustible gases, liquids, vapors,
dusts or other combustible materials and substances. To
reduce the risk of fire and explosion:
– Never operate the chain saw in a location where
combustible gases, liquids, vapors, dusts or other
combustible materials and substances are present.
– Read and follow recommendations issued by
government authorities (e.g., CCOHS) for identifying
and avoiding the hazards of combustible gases,
liquids, vapors, dusts or other combustible materials
and substances.
￭ If a rotating chain strikes a rock or other hard object,
sparks may be created, which can ignite flammable
materials under certain circumstances. Flammable
materials can include dry vegetation and brush,
particularly when weather conditions are hot and dry.
– When there is a risk of fire or wildfire, do not use your
chain saw around flammable materials or around dry
vegetation or brush.
– Contact your local fire authorities or the Canadian
Forest Service if you have any question about
whether vegetation and weather conditions are
suitable for the use of a chain saw.
￭ Using this chain saw and sharpening its chain can
generate dust, oil mist and other substances containing
chemicals known to cause respiratory problems, cancer,
birth defects and other reproductive harm.
– Consult governmental agencies such as ECCC,
CCOHS and PHAC and other authoritative sources
on hazardous materials if you are unfamiliar with the
risks associated with the particular substances you
are cutting or with which you are working.
￭ Inhalation of certain dusts, especially organic dusts such
as mold or pollen, can cause susceptible persons to have
an allergic or asthmatic reaction. Substantial or repeated
inhalation of dust or other airborne contaminants,
especially those with a smaller particle size, may cause
respiratory or other illnesses. This includes wood dust,
especially from hardwoods, but also from some softwoods
such as Western Red Cedar.
– Control dust (such as saw dust) and mists (such as
oil mist from chain lubrication) at the source where
possible.
– Always work with a properly sharpened chain, which
produces wood chips rather than fine dust.
– To the extent possible, operate the chain saw so that
the wind or operating process directs any dust, mist
or other particulate matter raised by the chain saw
away from the operator.
– When respirable dust or other particulate matter
cannot be kept at or near background levels, always
wear a respirator that is approved by NIOSH and
rated for worksite-specific conditions. Follow the
recommendations of governmental authorities (e.g.,
CCOHS/PHAC) and occupational and trade
associations.

0458-009-8201-A
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English 5 IMPORTANT SAFETY INSTRUCTIONS
￭ If the vegetation being cut or the surrounding ground is
coated with a chemical substance, such as pesticide or
herbicide:
– Read and follow the instructions and warnings that
accompanied the substance coating the vegetation
or surrounding ground.
￭ Breathing asbestos dust is dangerous and can cause
severe or fatal illness, respiratory illness or cancer,
including mesothelioma. The use and disposal of
asbestos-containing products is strictly regulated by
CCOHS and ECCC.
– Do not use your chain saw to cut or disturb asbestos
or asbestos-containing products.
– Stop work immediately and contact the relevant
state and local authorities and/or ECCC, your
employer or local CCOHS representative if you
have reason to believe that you might be disturbing
asbestos.
￭ Repeated contact with waste oil can cause skin cancer
and its use is harmful to the environment.
– Do not use waste oil to lubricate the bar and chain of
your STIHL chain saw.
5.5.4 Operating Instructions
WARNING
￭ To reduce the risk of severe personal injuries from
unintentional starting:
– Never touch a chain with your hand or any part of
your body when the battery is inserted, even when
the chain is not rotating.
– Avoid contacting the trigger switch lockout and
trigger switch when grasping the rear handle of the
chain saw.
￭ The chain continues to move for a short period after the
trigger switch is fully released.
– Wait for the chain to stop and engage the chain
brake before walking with the chain saw or putting it
down.
￭ In the event of an emergency:
– Switch off the motor immediately, engage the chain
brake and remove the battery.
￭ Your chain saw is equipped with a chain catcher. It is
designed to reduce the risk of personal injury in the event
of a thrown or broken chain.
– Never operate the chain saw with a damaged or
missing chain catcher.
￭ Contacting foreign objects while sawing might cause the
chain to break or be thrown, or cause the chain saw to
propel dangerous debris or kick back in the direction of the
operator. To reduce the risk of severe or fatal personal
injury caused by contact with foreign objects:
– Inspect the tree, log or branch before cutting.
– Remove any foreign objects to ensure that the wood
is free of materials such as nails, spikes, cables, or
wires.
– Before starting a cut, ensure that it can be completed
without contacting surrounding objects or structures
such as fencing or stonework.
￭ Check the chain and guide bar at regular short intervals
during operation, or immediately if there is a change in
cutting behavior:
– Switch off the motor, activate the chain brake and
remove the battery.
– Check the condition and tension of the chain. Look
for damage to the chain or guide bar.
– If the chain cannot be properly tensioned, or if other
components of the saw are worn or damaged, stop
work immediately and take your chain saw to an
authorized STIHL servicing dealer for inspection,
repair or maintenance.

0458-009-8201-A 15
English 6 Kickback and Other Reactive Forces
DANGER
￭ To reduce the risk of electrocution:
6.1 Reactive Forces
WARNING
￭ Reactive forces may occur any time the chain is rotating.
Reactive forces can cause serious or fatal personal injury.
￭ The powerful forces used to cut wood can be reversed and
work against the operator. If the rotating saw chain is
suddenly and significantly slowed or stopped by contact
with any solid object such as a log or branch, or is
pinched, the reactive forces may occur instantly.
￭ These reactive forces may result in loss of control, which,
in turn, may cause serious or fatal injury.
– An understanding of the causes of these reactive
forces may help you avoid the element of surprise
and loss of control. Surprise contributes to
accidents.
The most common reactive forces are:
– Kickback
– Pull-in
– Pushback
6.2 Kickback
6.2.1 Kickback
WARNING
￭ When this occurs, the energy driving the chain can create
a force that moves the chain saw in a direction opposite to
the chain movement at the point where the chain is slowed
or stopped. This may fling the bar up and back in a
lightning fast reaction mainly in the plane of the bar and
can cause severe or fatal injury to the operator.
￭ Kickback may occur, for example, when the chain near the
upper quadrant of the bar nose contacts the wood or is
pinched during limbing, or when it is incorrectly used to
begin a plunge or boring cut.
￭ The greater the force of the kickback reaction, the more
difficult it becomes for the operator to control the chain
saw. Many factors influence the occurrence and force of
the kickback reaction. These include chain speed, the
speed at which the bar and chain contact the object, the
– Never operate this chain saw in the
vicinity of any wires or cables that may
be carrying electric current.
– Never cut near power lines.
– Do not rely on the chain saw's insulation
against electric shock.
6 Kickback and Other Reactive Forces
Kickback may occur when the moving chain near
the upper quadrant of the bar nose contacts a
solid object or is pinched.
0000-GXX-1374-A0

0458-009-8201-A
16
English 6 Kickback and Other Reactive Forces
location and angle of contact, the condition of the chain,
and how quickly the chain is slowed or stopped, among
other factors.
– The type of bar and chain you use is an important
factor in the occurrence and force of the kickback
reaction. Some STIHL bar and chain types are
designed to reduce kickback forces.
– STIHL recommends the use of reduced kickback
bars and low kickback chains.
6.2.2 Chain Saw Kickback Standards
The following standards apply with respect to kickback:
– CSA Z62.1
– CSA Z62.3
These standards, referred to as "the chain saw kickback
standards" in this chapter, set certain performance and
design criteria related to chain saw kickback.
To comply with the chain saw kickback standards, electric
chain saws:
– must, in their original condition, meet a 45° computer-
derived kickback angle when equipped with certain cutting
attachments; and
– must be equipped with at least two devices to reduce the
risk of kickback injury, such as a chain brake, low kickback
chain, reduced kickback bar, etc.
The computer-derived angles for electric chain saws are
measured by applying a computer program to test results
from a kickback test machine.
WARNING
￭ Compliance with the chain saw kickback standards does
not mean that the bar and saw chain will rotate at most 45°
in a real life kickback.
￭ The computer-derived angles of the chain saw standards
may bear no relationship to actual kickback bar rotation
angles that may occur in a real life cutting situation.
￭ Devices designed to reduce the risk of kickback injuries
may lose some of their effectiveness when they are no
longer in their original condition, especially if they have
been improperly maintained.
– Read and follow the safety precautions and
instructions in this manual.
– When working, always position the chain saw such
that your body is clear of the cutting attachment and
outside of the cutting plane.
– Follow the maintenance and service instructions in
this manual.
￭ For the chain saw to meet the chain saw kickback
standards, use only the following cutting attachments:
– Compliant bar and chain combinations listed in
Combinations of Guide Bars and Saw Chains,
@27.1;
– Other replacement bar and saw chain combinations
marked in accordance with the standards for use on
the chain saw; or
– Replacement saw chain designated "low kickback
saw chain."
6.2.3 Devices for Reducing the Risk of Kickback Injury
The STIHL Quickstop chain brake and STIHL's green-
labeled, reduced kickback bars and green-labeled, low
kickback chains are designed to reduce the risk of kickback
injury.
1. STIHL Quickstop Chain Brake

0458-009-8201-A 17
English 6 Kickback and Other Reactive Forces
There are two mechanisms for activating the chain brake if
it is in a properly maintained condition:
– Manual Activation: If a kickback occurs, the chain saw
moves upwards toward the user in a rotating motion
around the front handle. The brake is designed to engage
if the left hand contacts the front hand guard, which is the
activation lever for the brake, and pushes it forward.
– Inertia Activation: All STIHL chain saws are equipped with
an inertia Quickstop chain brake. If the kickback impulse
is strong enough, this alone is sufficient to engage the
brake even without contacting the front hand guard.
WARNING
￭ To reduce the risk of kickback injury:
– Never use a saw if the chain brake does not function
properly.
– When in doubt, take the saw to an authorized STIHL
servicing dealer for inspection and/or repair.
– Do not use the saw until the problem has been
corrected.
￭ In a kickback situation, the front hand guard helps protect
your left hand from contacting the chain. Removal of the
front hand guard on a chain saw equipped with a
Quickstop chain brake will reduce this protection and also
disable the chain brake, increasing the risk of kickback
injury.
– Never operate your saw without a properly
functioning front hand guard. If the front hand guard
is missing, manual activation and inertia activation of
the chain brake will be completely disabled.
– Never attempt to remove, modify or disable the front
hand guard or any other component of the chain
brake.
￭ No Quickstop or other chain brake device prevents
kickback. These devices are designed to reduce the risk
of injury, if activated, in certain kickback situations. To
reduce the risk of severe personal injury or death from
kickback:
– Always follow the instructions in this manual and
follow good working technique. For example,
position your body clear of the cutting attachment
whenever the motor is running. Stand to the left of
the cut while bucking, outside of the cutting plane.
See chapter Holding and Controlling the Chain Saw,
@5.5.2.
– Maintain as much distance as possible, and never
less than 45 degrees, between the bar and your
body to ensure that the Quickstop has sufficient time
to activate and stop the chain before reaching any
part of your body.
– Follow the other precautions provided in chapter
@5.3.
￭ An improperly maintained chain brake may increase the
time needed to stop the chain after activation, or may not
activate at all. For the Quickstop to reduce the risk of
kickback injury, it must be properly maintained and in
good working order.
– Read and follow the instructions on engaging and
disengaging the chain brake, @14, and
maintaining and repairing it, @14.3.
2. Low Kickback Saw Chain and Reduced Kickback Bars
0000-GXX-1890-A0

0458-009-8201-A
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English 6 Kickback and Other Reactive Forces
STIHL offers a variety of guide bars and chains. STIHL
reduced kickback bars and low kickback chains are
designed to reduce the risk of kickback injury. Other chains
are designed to achieve higher cutting performance or
sharpening ease, but are more prone to kickback and may
kick back with more energy, making it more difficult to
control the chain saw.
STIHL has developed a color code system to help you
identify the STIHL reduced kickback bars and low kickback
chains.
– Cutting attachments with green labels on the packaging
are designed to reduce the risk of kickback injury.
– Matching green-marked or labeled chain saws with green-
labeled bars and green-labeled chains provides
compliance with the computed kickback angle
requirements of the chain saw standards when the
products are in their original condition.
– Products with yellow labels are for users with
extraordinary cutting needs, who have experience and
specialized training for dealing with kickback.
STIHL recommends the use of its green-labeled reduced
kickback bars, green-labeled low kickback chains and a
chain saw equipped with a STIHL Quickstop chain brake for
both experienced and inexperienced operators.
STIHL recommends green-labeled bars and chains for all
chain saws. See your "STIHL Bar and Chain Information"
leaflet for details.
New bar and chain combinations may be developed after
publication of this literature, which will, in combination with
certain electric chain saws, comply with the chain saw
standards as well.
WARNING
￭ Use of bar and chain combinations not listed in the STIHL
Bar and Chain Information leaflet (or other combinations
that do not comply with the chain saw standards) may
increase kickback forces as well as the propensity for
kickback and increase the risk of kickback injury.
– Please ask your authorized STIHL servicing dealer
to properly match your chain saw with the
appropriate bar and chain combination to reduce the
risk of kickback injury.
￭ Reduced kickback bars and low kickback chains do not
prevent kickback, but they are designed to reduce the risk
of kickback injury.
– STIHL recommends green-labeled bars and green-
labeled chains for all chain saws and all users.
￭ Even if your saw is equipped with a Quickstop chain
brake, a reduced kickback bar and/or low kickback chain,
this does not eliminate the risk of injury from kickback.
– Observe all safety precautions discussed in this
manual to avoid kickback situations.
a. Low Kickback Saw Chain
Some types of chain have specially designed components to
reduce the propensity for kickback and the force of kickback
if it occurs. STIHL has developed low kickback chain for your
chain saw.
A "low kickback chain" is a chain that has met the kickback
performance requirements of CSA Z62.3 when tested
according to the provisions specified in CSA Z62.3.
WARNING
￭ Some low kickback chains have not been tested with all
chain saw and bar combinations. There are potential saw,
bar and low kickback chain combinations which have not