Read Instruction Manual thoroughly before use and
follow all safety precautions – improper use can cause
serious or fatal injury.
ADVERTENCIA
Antes de usar la máquina lea y siga todas las precauciones
de seguridad dadas en el manual de instrucciones – el uso
incorrecto puede causar lesiones graves o mortales.
This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process
with electronic systems.
Thank you for your purchase. The information contained in
33
this manual will help you receive maximum performance and
33
satisfaction from your STIHL lawn mower and, if followed,
34
reduce the risk of injury from its use.
36
SAVE THIS MANUAL!
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40
40
Have your authorized STIHL servicing dealer show you how
40
to operate your lawn mower.
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Do not lend or rent your lawn mower without this instruction
manual. Allow only persons who have the proper training
40
and fully understand the information in this manual to
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operate the lawn mower.
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For further information, or if you do not understand any of
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the instructions in this manual, please go to
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www.stihlusa.com or contact your authorized STIHL
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servicing dealer.
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Because a lawn mower is a high-speed cutting
tool and is battery-powered, 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
lawn mower can cause serious or fatal injury.
2Guide to Using this Manual
2.1Signal Words
This manual contains safety information that requires your
special attention. Such information is introduced with the
following symbols and signal words:
DANGER
Indicates a hazardous situation that, if not avoided, will
result in death or serious injury.
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3 Main Parts
English
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.
2.2Symbols in Text
The following symbol is included to assist you with the use
of the manual:
Refers to a designated chapter or sub-chapter in this
instruction manual.
3Main Parts
3.1Lawn Mower and Battery
2
1
15
3
6
4
5
14
13
16
17
#
19
7
8
#
#
26
11
20
21
22
23
24
25
9
10
0458-818-8621-A
18
12
1 Switch Lever Lockout
Prevents activation of the switch lever until depressed.
2 Switch Lever
Switches the mower blade on and off.
3 Handle
For controlling the lawn mower.
0000-GXX-7730-A1
3
English
4 Safety Symbols on the Products
4 Self-Propel Lever
Activates drive system.
5Knob
Enables upper handle to be folded down.
6 Speed Lever
Controls the drive speed.
7 Rear Discharge Cover
Helps prevent the ejection of cuttings during mowing.
8 Handle Knob
Enables lower and upper handle to be folded down.
9 Battery Compartment Cover
Covers and protects battery compartment, spare battery
storage compartment, ECO-switch, battery and fuse key.
10 Cover
Designed for transporting the unit and covering the
housing.
11 Mowing Blade
Metal blade for cutting and mulching grass.
12 Side Discharge Guide
Guide cuttings towards the ground during mowing.
13 Side Discharge Cover
Helps prevent the ejection of cuttings during mowing.
14 Cutting Height Adjustment Lever
Used to set the height of the mowing blade.
15 Grass Bag
Collects cuttings during mowing.
16 Rear Discharge Chute
Ejects cuttings into the grass bag during mowing.
17 Mulch Insert
Prevents the ejection of cuttings to the rear discharge
chute.
18 Trailing Shield
Designed to reduce the risk of injury from thrown objects
and/or blade contact.
19 Battery
Supplies electrical power to the motor.
20 Push Button
Activates the battery's LEDs.
21 Battery LEDs
Indicate the battery's state of charge and display error
messages regarding potential malfunctions in the battery
or power tool.
22 Spare Battery Compartment
Holds the spare battery.
23 Fuse Key Socket
Socket for connecting the fuse key to the lawn mower.
24 Fuse Key
Interrupts the circuit between the battery and motor.
25 Battery Compartment
Holds the battery.
26 ECO-Switch
Turns the ECO-mode on or off.
# Rating Plate
Contains electrical information and the product's serial
number.
4Safety Symbols on the Products
4.1Lawn Mower
The following safety symbols are found on the lawn mower:
To reduce the risk of injury, follow the specified
safety precautions.
Read and follow all safety precautions in the
instruction manual. Improper use can lead to
serious or fatal personal injury or property
damage.
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4 Safety Symbols on the Products
English
To reduce the risk of eye injury, always wear
proper eye protection, @ 5.5.
To reduce the risk of personal injury or property
damage from a short circuit, fire or explosion,
keep the lawn mower dry. Protect it from rain,
water, liquids and damp conditions. Never
immerse the lawn mower in water or other
liquids, @ 5.6.
To reduce the risk of laceration injuries, keep
hands, feet and other body parts away from the
mowing blade. Never put hands or feet under the
lawn mower, particularly during operation. Never
attempt to clear clippings or debris from the
mowing blade or discharge chutes without first
switching off the mower and removing the fuse
key and battery, @ 5.7.4.
DANGER - Keep Hands and Feet Away.
To reduce the risk of injury, keep hands and feet
away from rotating parts. Do not operate unless
discharge covers or grass bag are securely in
place. If damaged, replace discharge covers
immediately, @ 5.7.4.
The rotating mowing blade may throw or fling
foreign objects directly or by ricochet. To reduce
the risk of personal injury from thrown objects,
inspect the mowing area and remove stones,
pieces of metal, glass, wire and other objects that
could be thrown by the mowing blade, @ 5.7.4.
To reduce the risk of personal injury
from thrown objects, keep bystanders
at least 50 ft. (15 m) away, @ 5.7.4.
To reduce the risk of injury or property damage
from unintended activation, remove the battery
any time the lawn mower is not in use, @ 5.7.
4.2Battery
The following safety symbols are found on the AK series
battery:
To reduce the risk of injury, follow the specified
safety precautions.
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, @ 6.
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), @ 6.
To reduce the risk of personal injury or property
damage from a short circuit, fire or explosion,
keep dry. Protect from rain, water, liquids and
damp conditions. Never immerse in water or
other liquids, @ 6.
Batteries sold separately.
0458-818-8621-A
To reduce the risk of injury from loss of control,
mow parallel to the slope, never up or down.
Take particular care when changing direction on
slopes, @ 5.7.4.
5
English
5 IMPORTANT SAFETY INSTRUCTIONS
5IMPORTANT SAFETY
INSTRUCTIONS
5.1General Safety Warnings and Instructions
This section contains the prescribed general safety
warnings and instructions for electric lawn mowers.
Additional important warnings and instructions are provided
in subsequent sections of this manual.
WARNING
When using electric lawn mowers, basic safety precautions
should always be followed to reduce the risk of fire, electric
shock and personal injury, including the following:
READ ALL INSTRUCTIONS BEFORE USING THE LAWN
MOWER!
1)Avoid Dangerous Environment – Don’t use lawn mowers
in damp or wet locations.
2)Don’t Use In Rain.
3)Keep Children Away – All bystanders should be kept at a
distance from work area.
4)Dress Properly – Do not wear loose clothing or jewelry.
They can be caught in moving parts. Substantial footwear
is recommended. Never wear sandals, tennis shoes, flip
flops or similar footwear or go barefoot. Wear heavy-duty
work gloves (e.g. made of leather or other wear-resistant
material) when transporting the mower or carrying out
work on the mower blade.
5)Use Protective Glasses – Always use an approved face or
dust mask if operation is dusty.
6)Use the Right Appliance – Do not use the lawn mower for
any job except that for which it is intended.
7)Do Not Force the Lawn Mower – It will do the job better
and more safely at the rate for which it was designed.
8)Do Not Overreach – Keep proper footing and balance at
all times.
9)Stay Alert – Watch what you are doing. Use common
sense. Do not operate the lawn mower when you are tired.
10)Disconnect the Lawn Mower – Disconnect the lawn
mower from the power supply by removing the fuse key
and battery when not in use, before servicing, when
changing accessories such as blades, and the like.
11)Store Lawn Mower Indoors – When not in use, lawn
mower should be stored indoors in a dry and locked place
– out of reach of children.
12)Maintain the Lawn Mower With Care – Keep cutting
edges sharp and clean for optimal performance and to
reduce the risk of injury. Follow instructions for lubricating
and changing accessories. Inspect lawn mower
periodically and, if damaged, have it repaired by an
authorized service facility.
13)Keep handles dry, clean and free from oil and grease.
14)Keep guards in place and in working order.
15)Keep blades sharp.
16)Keep hands and feet away from cutting area.
17)Objects struck by lawn mower blade can cause severe
injuries to persons. The lawn should always be carefully
examined and cleared of all objects prior to each mowing.
18)If lawn mower strikes a foreign object, follow these steps:
– Stop lawn mower. Release switch lever.
– Remove fuse key and battery.
– Inspect for damage.
– Have any damage repaired by an authorized service
facility before restarting and operating the lawn mower.
19)Use identical replacement blades only.
SAVE THESE INSTRUCTIONS
5.2General Safety Warnings and Instructions for
Battery-Powered Products
This section contains the prescribed general safety
warnings and instructions for battery-powered products
contained in UL 2595.
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5 IMPORTANT SAFETY INSTRUCTIONS
English
WARNING
Read all safety warnings and instructions. Failure to follow
the warnings and instructions may result in electric shock,
fire, explosion and/or serious injury or property damage.
1)Prevent unintentional starting. Ensure the switch lever is
in the off-position before inserting the battery.
2)Remove the fuse key and battery before picking up or
carrying the mower and before making any adjustments,
changing accessories or storing. Such preventive safety
measures reduce the risk of starting the mower
accidentally.
3)Recharge only with the charger specified by STIHL. A
charger that is suitable for one type of battery may create
a risk of fire when used with another battery.
4)Use the mower only with the specifically designated
batteries. Use of any other battery may create a risk of fire
or explosion and personal injury or property damage.
5)When the battery is not in use, keep it away from other
metal objects, like paper clips, coins, keys, nails or other
small metal objects that can make a connection from one
terminal to another. Do not store it in a metal container.
Shorting the battery terminals together may cause burns
or a fire or explosion.
6)Under abusive conditions, liquid may be ejected from the
battery; avoid contact. If contact accidentally occurs, flush
with water. If liquid contacts eyes, additionally seek
medical help. Liquid ejected from the battery may cause
irritation, chemical burns or respiratory illness from
inhalation
7)Do not use a battery or mower that is damaged or
modified. Damaged or modified batteries may exhibit
unpredictable behaviour resulting in fire, explosion and
risk of injury or property damage.
8)Do not expose a battery or the mower to fire or excessive
temperature. Exposure to fire or temperature above 212°
F (100° C) may cause fire and explosion.
9)Follow all charging instructions and do not charge the
battery outside of the ambient temperature range
specified. Charging improperly or outside the specified
range may damage the battery and increase the risk of
fire.
10)Have servicing performed by a qualified repair person
using only authorized replacement parts. This will help
maintain the safety and performance of the product.
SAVE THESE INSTRUCTIONS
5.3Intended Use
WARNING
■ This lawn mower is intended for manual lawn mowing.
Use of the lawn mower for operations different than
intended could result in serious injury or death.
– Use this lawn mower only for mowing dry grass. Do
not mow wet grass.
– Do not use it for any other purposes.
■ Improper use could result in personal injury or property
damage, including damage to the lawn mower.
– Use the lawn mower and battery only as described
in this manual.
– Never attempt to modify or override the lawn
mower's controls or safety devices in any way.
– Never use a lawn mower that has been modified or
altered from its original design.
– 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 only by a STIHL AK
series battery.
■ The STIHL AK series battery is designed for use only with
compatible STIHL power tools.
Batteries, chargers and other accessories are sold
separately.
0458-818-8621-A
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5 IMPORTANT SAFETY INSTRUCTIONS
5.4Operator
WARNING
■ Working with the lawn mower 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 lawn mower
if you have any health condition that may be
aggravated by strenuous work.
– Do not operate the lawn mower 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 lawn mower when you
are tired. Take a break if you become tired.
– Do not permit minors to use the lawn mower.
– Bystanders, especially children, and animals should
not be allowed in the area where the lawn mower is
in use.
■ According to STIHL's current knowledge, the electric
motor of this lawn mower 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 lawn mower.
5.5Personal Protective Equipment
– Wear sturdy and snug-fitting clothing that
also allows complete freedom of
movement.
– Wear overalls or long pants made of
heavy material to help protect your legs.
Do not wear shorts.
or cuffed pants, jewelry and any other apparel that
could be caught on branches, brush or the moving
parts of the mower.
– Secure hair above shoulder level before starting
work.
■ To reduce the risk of eye injury:
– Always wear goggles or close-fitting
protective glasses with adequate side
protection that are impact-rated and
marked as complying with ANSI Z87 "+".
■ Good footing is very important. To help maintain a secure
footing and reduce the risk of injury while working:
– Wear substantial footwear with non-slip
soles. Do not wear sandals, flip-flops,
open-toed or similar footwear or go
barefoot.
■ To improve your grip and help protect your hands:
– Always wear heavy-duty non-slip work
gloves made of leather or another wearresistant material when handling the
lawn mower or its mowing blade
WARNING
■ Loss of control and severe cut injuries may result if hair,
clothing or apparel make contact with the moving mowing
blade or otherwise become entangled in the components
of the lawn mower. To reduce the risk of severe personal
injury:
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5 IMPORTANT SAFETY INSTRUCTIONS
English
5.6Lawn Mower
WARNING
■ If the moving mowing blade contacts you, it will result in
serious laceration injuries. To reduce the risk of such
injuries:
– Keep hands, feet and other parts of your body away
from the mowing blade.
– Never touch the moving mowing blade with your
hand or any other part of your body.
■ To reduce the risk of electric shock:
– Do not expose the lawn mower to rain,
water or excessive moisture.
– Never immerse the lawn mower in water
or other liquids.
– Do not leave the mower outdoors in the
rain.
– Store the lawn mower indoors.
■ If the moving mowing blade contacts you, it will result in
serious laceration injuries. To reduce the risk of such
injuries:
– Keep hands, feet and other parts of your body away
from the mowing blade.
– Never touch the moving mowing blade with your
hand or any other part of your body.
■ To reduce the risk of personal injury to the operator and
bystanders:
– Always release the switch lever, remove
the fuse key and battery before
assembling, transporting, adjusting,
inspecting, cleaning, servicing,
maintaining or storing the lawn mower
and any other time it is not in use.
■ Although certain unauthorized accessories or
attachments may fit STIHL lawn mowers, their use may
increase the risk of personal injury. Only accessories and
attachments supplied by STIHL or expressly approved by
STIHL for use with this specific lawn mower model are
recommended.
– Use only attachments supplied or expressly
approved by STIHL.
– Never modify this lawn mower or its software in any
way.
– Never attempt to modify or override the lawn
mower's controls or safety devices in any way.
– The switch and safety devices installed in the lawn
mower must not be removed or bypassed. In
particular, never secure the switch lever to the
handle (e.g., by tying it.)
– Never use a lawn mower that has been modified or
altered from its original design.
■ If the lawn mower 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 are
working properly.
– Check the LEDs for error messages, @ 10.1.2.
– 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 lawn
mower or battery. In case of doubt, have the lawn
mower and battery checked by your authorized
STIHL servicing dealer.
■ If the lawn mower or battery is damaged, not working
properly, has been left outdoors, exposed to rain or damp
conditions or dropped into water or other liquid, its
0458-818-8621-A
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English
5 IMPORTANT SAFETY INSTRUCTIONS
components may no longer function properly and safety
devices may be inoperative. To reduce the risk of personal
injury and property damage:
– Take the lawn mower and battery to your authorized
STIHL servicing dealer to be checked before further
operation.
■ Genuine STIHL replacement parts are specifically
designed to match your lawn mower 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.
5.7Using the Lawn Mower
5.7.1Before Operation
WARNING
■ Misuse or unauthorized use may result in personal injury
and property damage.
– Use the lawn mower only as described in this
instruction manual.
■ Minors should never be allowed to use this power tool.
Bystanders, especially children, and animals should not
be allowed in the area where it is in use. Accidents can
occur if the operator is not alert to the presence of
children. Children are often attracted to the machine and
mowing activities. Never assume that children will remain
where you last saw them. Keep children under the
watchful eye of a responsible adult other than the
operator. Use extra care when approaching blind corners,
shrubs, trees or other objects that may block your view of
a child.
■ Using a lawn mower that is 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 lawn mower that is damaged,
improperly maintained or not completely and
securely assembled.
– Always check your lawn mower for proper condition
and operation before starting work, particularly the
switch lever, switch lever lockout and make a visual
inspection of the mowing blade.
– Ensure that the switch lever and switch lever lockout
move freely and always spring back to the locked
position when released. The switch lever must not
engage until the switch lever lockout is depressed.
– Never attempt to modify or override the controls or
safety devices in any way.
– If your lawn mower or any part is damaged or does
not function properly, take it to your authorized
STIHL servicing dealer. Do not use the lawn mower
until the problem has been corrected.
■ Never use your mower with a damaged grass bag.
– Inspect the grass bag frequently and replace with an
authorized replacement if there are signs of wear or
deterioration.
■ 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
lawn mower, @ 15.1.
■ To help reduce the risk of serious personal injury or death
from unintentional starting:
– Be sure the switch lever and switch lever lockout are
in the off position when inserting the battery.
– Avoid contacting the switch lever and switch lever
lockout when grasping the handle of the lawn
mower.
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5 IMPORTANT SAFETY INSTRUCTIONS
English
– Release the switch lever and switch lever lockout
before removing the battery.
– Remove the fuse key and battery before
assembling, transporting, adjusting,
inspecting, cleaning, servicing,
maintaining or storing the lawn mower
and any time it is not in use.
– Never leave the lawn mower unattended when the
battery is inserted.
– Never store the battery in the lawn mower.
■ Before switching on your lawn mower, take the following
steps to reduce the risk of personal injury from thrown
objects, loss of control or inadvertent contact with the
mowing blade:
– Be sure that the mowing blade is clear of you and all
other obstructions and objects, including the ground.
– Read and follow the instructions on switching on the
lawn mower, @ 15.1.
DANGER
■ To reduce risk of electrocution:
– Never operate this lawn mower in the
vicinity of any wires or cables that may
be carrying electric current.
– Do not rely on the lawn mower's
insulation against electric shock.
5.7.2Holding and Controlling the Lawn Mower
WARNING
■ To maintain a firm grip and properly control your lawn
mower:
– Operate the mower at walking pace at all times -
never run.
– Keep the handles clean and dry at all times. Keep
them free of moisture, pitch, oil, grease and resin.
■ Operating the lawn mower with one hand may lead to loss
of control and is extremely dangerous. To reduce the risk
of serious or fatal injury to the operator or bystanders from
loss of control:
– Never attempt to operate the lawn mower with one
hand.
■
0000-GXX-7742-A0
■ To reduce the risk of serious or fatal injuries to the
operator or bystanders from loss of control:
– Always hold the lawn mower firmly with both hands
when you are working.
– Wrap your fingers tightly around the handle, keeping
the handle, switch and self-propel lever cradled
between your thumb and forefinger (see illustration
above).
– Activate the self-propel feature after switching on the
lawn mower.
– Do not use the mower for transporting persons or
objects.
– Do not attach objects to the handle.
■ To reduce the risk of serious or fatal injuries to the
operator or bystanders from contact with the mowing
blade:
– Keep hands, feet and other body parts
away from the mowing blade.
– Never touch a moving mowing blade with
your hand or any other part of your body.
0458-818-8621-A
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5 IMPORTANT SAFETY INSTRUCTIONS
– Never attempt to clear clippings or debris
from the mowing blade or discharge
chutes without first switching off the lawn
mower and removing the fuse key and
battery.
– Do not touch the mowing blade while the battery and
fuse key are inserted in the lawn mower.
■ 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:
– Never work with the lawn mower in the rain or in wet
or very damp conditions.
– Make sure you have good balance and a secure
footing at all times.
– Take special care in overgrown terrain and always
watch for hidden obstacles such as tree stumps,
roots, rocks, holes and ditches to avoid stumbling or
falling.
– Be extremely cautious when working on slopes or
uneven ground.
– For better footing, always clear away fallen
branches, scrub, cuttings and other material, objects
or vegetation that can increase the danger of
slipping, tripping or falling.
– Do not overreach.
■ To reduce the risk of serious injuries to the operator or
bystanders from loss of control:
– Do not mow near drop offs, ditches or
embankments. You could lose your
footing and balance.
– Be extremely cautious when working on
slopes or uneven ground. Do not operate
the lawn mower on excessively steep
slopes. Slopes are a major factor related
to slip and fall accidents, which in turn
can result in severe injury.
– Operate this lawn mower only on slopes
with gradients of up to 25°.
– Mow parallel to the slope, never up or
down. Take particular care when
changing direction on slopes.
– Do not pull the mower backwards unless
absolutely necessary. Always look down
and behind before and while mowing
backwards.
b
max. 25° (46,6 %)
a
0000-GXX-8196-A0
25° slope gradient represents a vertical gradient of
b = 18.3 in. (46.6 cm) at a = 39.4 in. (100 cm) horizontal
length.
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English
5.7.3Working Conditions
WARNING
■ Operate your lawn mower only under good visibility during
favorable daylight conditions.
– Postpone the work if the weather is windy, foggy,
rainy or inclement.
– Never operate the mower in wet grass. Do not mow
wet grass.
– Do not operate the mower when there is a risk of
lightning strike.
■ Your lawn mower is a one-person machine.
– Bystanders, especially children, and animals should
not be allowed in the area where it is in use.
– Switch it off immediately if you are approached.
■ To reduce the risk of injury to bystanders and
unauthorized users:
– Never leave the lawn mower unattended when the
fuse key and battery are inserted.
– Switch off the lawn mower and remove the fuse key
and battery during work breaks and any other time
the lawn mower is not in use.
■ The drive motor is not waterproof.
– Never work with the lawn mower in the rain or in wet
or very damp locations.
■ Sparks generated from operation of the lawn mower, 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 lawn mower 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., OSHA) for identifying
and avoiding the hazards of combustible gases,
liquids, vapors, dusts or other combustible materials
and substances.
■ If a rotating metal blade 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 the
lawn mower around flammable materials or around
dry vegetation or brush.
– Contact your local fire authorities or the U.S. Forest
Service if you have any question about whether
vegetation and weather conditions are suitable for
the use of a metal blade.
■ Use of this lawn mower can generate dust and other
substances containing chemicals known to cause
respiratory problems, cancer, birth defects and other
reproductive harm.
– Consult governmental agencies such as EPA,
OSHA, CARB and NIOSH 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.
– Control dust at the source where possible.
– To the extent possible, operate the lawn mower so
that the wind or operating process directs any dust,
mist or other particulate matter raised by the lawn
mower 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.,
OSHA/NIOSH) and occupational and trade
associations.
0458-818-8621-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 a pesticide,
fertilizer or herbicide:
– Read and follow the instructions and warnings that
accompanied the substance coating the vegetation
or surrounding ground.
5.7.4Operating Instructions
WARNING
■ In the event of an emergency, switch off the motor
immediately and remove the fuse key and battery.
■ The mowing blade continues to rotate for a short period
after the switch lever is fully released. This is known as the
"flywheel effect." To reduce the risk of serious personal
injury from contact with the mowing blade:
– Wait for the mowing blade to stop before lifting or
carrying the lawn mower.
■ The mower deck of your lawn mower will not protect the
operator from all foreign objects (gravel, glass, wire, etc.)
thrown back by the rotating cutting blade. Thrown objects
may also ricochet and strike the operator, bystanders or
property.
– Avoid discharging material against a wall or
obstruction.
■ The rotating mowing blade may fling foreign objects
directly or by ricochet a great distance. Thrown objects,
including broken mowing blades, may cause serious or
fatal injury to the operator or bystanders. To reduce the
risk of severe personal injury:
– Inspect the work area. Remove stones,
glass, rocks, pieces of metal or other
objects that could be thrown by the
mowing blade, damage the mowing
blade or cause personal injury or
damage to property (e.g., parked
vehicles, windows).
– Always wear proper eye
protection and keep bystanders
at least 50 ft. (15 m) away from
the work area. Any persons who
must enter the restricted area
must also wear proper eye
protection.
– Stay behind the handle when the motor is running or
the cutting blade is turning.
– To reduce the risk of damage to property, also
maintain this distance from such objects as vehicles
and windows.
– Maintaining a minimum distance of 50 ft. (15 m)
cannot eliminate the potential risk of personal injury
and property damage from thrown objects.
– Switch off the motor immediately if you are
approached while working with the lawn mower.
– Never direct discharged material toward anyone.
– Never operate the lawn mower without the grass bag
or rear discharge cover in place and working. Make
sure all safety devices are in place before starting
work.
– Never operate the mower without the side discharge
cover closed or the side discharge guide in place.
■ To reduce the risk of severe personal injuries from
unintentional starting:
– Do not put hands or feet near or under
the machine. Keep clear of the discharge
opening at all times.
– Never touch the mowing blade with your
hand, feet or any other part of your body
while the fuse key and battery are
inserted, even if the mowing blade is not
moving. Keep bystanders at least 50 ft.
(15 m) away.
14
0458-818-8621-A
6 Battery Safety
English
– If the mowing blade or discharge chutes
become dirty, clogged or stuck, always
switch off the motor, make sure the
mowing blade has stopped and remove
the fuse key and battery before
inspecting the mowing blade. Clean dirt,
grass, weeds and other material from the
mowing blade and discharge chutes at
regular intervals, but only after removing
the fuse key and battery.
■ To reduce the risk of thermal overload to the motor and
damage to the mower:
– Do not switch on the mower in high grass.
– Do not overload your lawn mower during operation
with very tall or thick grass to a point where the
motor slows down. If the motor sounds distressed or
begins to slow due to the height of the grass or
amount of grass being cut, raise the mowing blade
or slow down.
– Do not switch on and off the mower frequently within
a short period.
■ A damaged or loose mowing blade may vibrate, crack,
break or come off the lawn mower, which may result in
serious or fatal injury.
– Before starting work, examine the blade. If the blade
is damaged or cracked, replace it immediately. If the
blade edge is dull or nicked, have it sharpened and
balanced or replace it.
– If the mowing blade loosens after being properly
tightened, stop work immediately and have the lawn
mower repaired by your authorized STIHL iMow
servicing dealer.
– Never use a lawn mower with a loose or damaged
mowing blade.
DANGER
■ To reduce risk of electrocution:
– Never operate this lawn mower in the
vicinity of any wires or cables that may
be carrying electric current.
– Do not rely on the lawn mower's
insulation against electric shock.
6Battery Safety
6.1Warnings and Instructions
WARNING
■ Use of unauthorized batteries can damage the lawn
mower and result in fire, explosion and personal injury and
property damage.
– Use only genuine STIHL AK series batteries.
■ Use of STIHL AK series batteries for any purpose other
than powering STIHL power tools could be extremely
dangerous.
– Use STIHL AK series batteries only to power
compatible STIHL power tools.
■ Use of unauthorized chargers can damage the battery and
result in fire, explosion and personal injury and property
damage.
– Use only genuine STIHL AL 101, AL 300 or AL 500
series chargers to charge STIHL AK series batteries.
■ The battery contains safety features and devices which, if
damaged, may allow the battery to generate heat, rupture,
leak, ignite or explode.
– Never heat the battery above 212 °F
(100 °C).
– Never incinerate or place the battery on
or near fires, stoves or other hightemperature locations.
– Never use or charge a malfunctioning, damaged,
cracked, leaking or deformed battery.
0458-818-8621-A
15
English
6 Battery Safety
– Never open, disassemble, crush, drop, subject to
heavy impact or otherwise damage the battery.
– Never expose the battery to microwaves or high
pressures.
– Never insert objects into the battery's cooling slots.
■ High temperatures may cause the battery to generate
heat, rupture, leak, ignite or explode, resulting in severe or
fatal personal injury and property damage. Exposure to
temperatures outside the recommended temperature
range may also reduce battery life and performance.
– Use and store the battery only within an
ambient temperature range of 14 °F to
122 °F (-10 °C to 50 °C).
– Never store the battery in direct sunlight
or inside a vehicle in hot weather.
■ To reduce the risk of personal injury and property damage
in the event the battery emits smoke, an unusual smell or
feels unusually hot while using, charging or storing:
– Immediately discontinue using or charging the
battery. Contact the authorities in the event of fire or
explosion.
■ To reduce the risk of a short circuit, which could lead to
electric shock, fire and explosion:
– Keep the battery dry. Protect it from rain,
water, liquids and damp conditions.
– Never immerse the battery in water or
other liquids.
– Never bridge the battery terminals with wires or
other metallic objects.
– Keep a battery that is not in use away from metal
objects (e.g., paper clips, nails, coins, keys).
– Never transport or store the battery in a metal
container.
– Store the battery indoors in a dry room.
– Never store the battery in damp or corrosive
environments or in conditions that could lead to
corrosion of its metal components.
– Never store the battery in the lawn mower or
charger.
– Protect the battery from exposure to corrosive
agents such as garden chemicals and de-icing salts.
– Protect the battery from exposure to conductive
liquids such as salt water.
– Do not attempt to repair, open or disassemble the
battery. There are no user-serviceable parts inside.
■ Leaking battery fluid is potentially harmful and can cause
skin and eye irritation, chemical burns and other serious
personal injury.
– Avoid contact with skin and eyes.
– Use an inert absorbent such as sand on spilled
battery fluid.
– In the event of accidental contact, immediately rinse
the contact area thoroughly with mild soap and
water.
– If fluid gets into your eye(s): Do not rub. Rinse water
over the open eye(s) for at least 15 minutes and
seek medical attention.
■ A battery fire can be dangerous. To reduce the risk of
severe personal injury and property damage in the event
of fire:
– Evacuate the area. Fire can spread rapidly. Stay
clear of any vapors generated and maintain a safe
distance.
– Contact the fire department.
– Although water can be used to put out a battery fire,
use of a multi-purpose dry chemical fire extinguisher
is preferable.
– Consult the fire department regarding proper
disposal of a burned battery.
■ Dropping the battery could result in personal injury or
property damage. To prevent the battery from falling
during removal:
– Place the lawn mower on a level surface.
– Use care when ejecting the battery.
16
0458-818-8621-A
7 Maintenance, Repair and Storage
English
7Maintenance, Repair and Storage
7.1Warnings and Instructions
WARNING
■ There are no user-authorized repairs for the battery or
lawn mower. To reduce the risk of fire, electric shock or
other personal injury and property damage:
– Users may carry out only the cleaning and
maintenance operations described in this manual.
Users must not attempt any other cleaning,
maintenance or repair.
– Strictly follow the cleaning and maintenance
instructions in the appropriate sections of this
instruction manual.
– Never attempt to repair a damaged or broken
mowing blade. This may cause broken parts to come
off and result in serious or fatal injuries.
– Wear non-slip, heavy-duty work gloves when
handling mowing blades.
– STIHL recommends that all repair work be
performed by authorized STIHL servicing dealers.
– Maintain and replace warning and instruction labels
as necessary.
■ Unintentional starting may result in personal injury or
property damage. To reduce the risk of personal injury
and property damage from unintentional starting:
– Remove the fuse key and battery before
inspecting the lawn mower or carrying
out any cleaning, maintenance or repair
work, before storing, and any other time
it is not in use.
■ The mowing blade is the only user-serviceable part on the
lawn mower.
– Wear heavy-duty, non-slip work gloves made of
leather or another wear resistant material when
handling the mowing blade.
– Replace the mowing blade when it becomes worn or
damaged.
– Tighten all nuts, bolts and screws after replacing the
mowing blade.
■ Use of parts that are not authorized or approved by STIHL
may cause serious or fatal injury or property damage.
– STIHL recommends that only authorized STIHL
replacement parts be used for repair or
maintenance.
■ Improper storage can result in unauthorized use, damage
to the lawn mower and an increased risk of fire, electric
shock and other personal injury or property damage.
– Remove the fuse key and battery from the lawn
mower before storing.
– Never store the lawn mower with the fuse key or
battery inserted.
– Store the lawn mower indoors in a dry, secure place
that cannot be accessed by children or other
unauthorized users.
8Before Starting Work
8.1Preparing the Lawn Mower for Operation
Before starting work:
► Fully charge the battery, @ 9.2.
► Mount the handle, @ 11.1.
► Unfold and adjust the handle, @ 12.1.
► Adjust the cutting height, @ 18.1.
► Check the controls for proper function and condition,
@ 17.1.
0458-818-8621-A
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English
9 Charging the Battery
For mowing and collecting the grass cuttings in the grass
bag:
► Remove the side discharge guide, @ 11.4.2.
► Remove the mulch insert, @ 11.3.2.
► Attach the grass bag, @ 11.2.1.
For mowing and discharging the grass cuttings sideways:
► Remove the mulch insert, @ 11.3.2.
► Remove the grass bag, @ 11.2.2.
► Attach the side discharge guide, @ 11.4.1.
For mulching:
► Remove the side discharge guide, @ 11.4.2.
► Remove the grass bag, @ 11.2.2.
► Mount the mulch insert, @ 11.3.1.
9Charging the Battery
9.1Setting up the Charger
WARNING
Read and follow the safety precautions on the battery and
charger and all warnings and instructions that accompany
those products. To reduce the risk of short circuit, which
could lead to electric shock, fire and explosion, make sure
the charger and its components are dry and not damaged;
operate the charger indoors at an appropriate ambient
temperature.
WARNING
A typical household electric circuit is between 15 and 20
amps. A single STIHL AL 500 charger draws approximately
4.8 amps. A single AL 300 charger draws approximately
4.4 amps. To reduce the risk of fire from overloading an
electrical circuit:
► Ensure the electrical system is rated to withstand the
expected electrical draw before charging your battery.
► Charge multiple batteries one at a time or on separate
circuits, unless you know your circuit can handle the total
expected draw from multiple chargers.
WARNING
Since the charger heats up during the charging process, do
not operate the charger on a combustible surface or in a
location where combustible gases, liquids, vapors, dusts or
other materials and substances are present.
To set up the charger:
4
3
1
► Insert the plug (3) into a properly installed electrical
outlet (4) matching the voltage and electrical frequency
stated on the rating plate on the charger.
The charger runs a self-test immediately after it is plugged
in. The charger LED (1) will glow green for about 1 second,
then it will glow red briefly before going out. Once the LED
goes out, the self-test is complete and the charger is ready
to charge the battery.
2
0000-GXX-3228-A1
18
0458-818-8621-A
10 LED Diagnostics
3
2
4
1
0000-GXX-0637-A0
English
► Position the power supply cord (2) so that it will not be
stepped on, tripped over, come in contact with sharp
objects or moving parts or otherwise present a tripping
hazard or be subjected to damage or stress.
9.2Charging
WARNING
STIHL batteries contain safety features and devices which,
if damaged, may allow the battery to generate heat, rupture,
leak, ignite or explode. Never charge a malfunctioning,
damaged, cracked, leaking or deformed battery. For indoor
use only. Keep the charger dry. Protect it from rain, water,
liquids and damp conditions. Never insert a wet battery.
Never use a wet charger, @ 6.
To charge the battery:
► Push the battery (2) into the charger (3) until it stops.
The LED on the charger (4) glows green when the battery
is charging.
The LEDs (1) on the battery glow green and show the
state of charge.
When the LEDs on the battery turn off, the charging
process is complete and the charger will shut itself off.
► Remove the battery from the charger and disconnect the
power supply cord from the electrical outlet when charging
is complete.
A battery is not fully charged when it ships from the factory.
STIHL recommends that you fully charge the battery before
using it the first time.
Operate the charger only indoors, in dry rooms and within an
ambient temperature range of 41 °F to 104 °F (5 °C to
40 °C).
The battery heats up during operation of the lawn mower. If
a hot battery is inserted into the charger, it may be
necessary for it to cool down before charging starts. The
charging process begins only after the battery has cooled
down sufficiently.
Charging time depends on a number of factors, including
battery condition and the ambient temperature. For a
complete list of approximate charging times, see
www.stihl.com/charging-times.
10 LED Diagnostics
10.1 LEDs on the Battery
10.1.1 Battery Status
Four LEDs show the status of the battery. These LEDs can
glow or flash green or red.
If on e LED glows red co ntinuously: the bat tery
is either too hot or too cold. Allow the battery
to warm up or cool down gradually at an
ambient temperature of about 50 °F to 68 °F
(10 °C to 20 °C).
If all 4 LEDs flash red: the battery has a
malfunction and must be replaced. Do not
attempt to charge, use or store the battery.
10.1.2 Lawn Mower Status
When the battery is inserted in the lawn mower, the same
LEDs on the battery will indicate the status of the lawn
mower.
0458-818-8621-A
19
English
1
0000-GXX-0629-A0
20-40%
40-60%
60-80%
80-100%
0-20%
5
7
2
6
3
1
4
8
1
2
0000-GXX-7731-A0
11 Assembling the Lawn Mower
If three LEDs glow red continuously: the lawn mower motor
is too hot. Allow the motor to cool down.
If three LEDs flash red when you activate the trigger switch:
the lawn mower has an electrical malfunction. Do not
operate the lawn mower. Have it checked by an authorized
STIHL servicing dealer before use or storage.
For troubleshooting information, @ 24.
10.1.3 Charge Status
The LEDs on the battery also show the battery's state of
charge.
To determine the battery's state of charge:
► Press the button (1) on the battery.
The LEDs on the battery will glow or flash green for about
5 seconds and indicate the state of charge (see
illustration).
For example:
If four green LEDs glow continuously: full charge.
If one green LED is flashing: less than 20 % charge.
11 Assembling the Lawn Mower
11.1 Mounting the Handle
WARNING
Make sure the fuse key and battery are removed before
starting assembly.
WARNING
To reduce the risk of injury from loss of control, ensure that
the handle is properly and securely mounted before starting
work. The lower handle and upper handle can be folded
down after rotating the handle knobs. Check that the star
knobs are firmly tightened. Hold the handle at the highest
point with one hand and rotate the handle knobs. Use
caution and avoid pinching fingers between the parts.
WARNING
To reduce the risk of pinching fingers between the parts,
hold the handle at the highest point with one hand when
loosening the star knobs.
To mount the handle:
► Switch off the lawn mower, @ 15.2.
► Remove the fuse key and battery, @ 13.2 and @ 14.2.
► Position the lawn mower on a level surface.
20
► Align the upper part (1) and lower part (2) of the handle so
that the pin (4) engages into the bore (3) on both sides.
0458-818-8621-A
11 Assembling the Lawn Mower
3
2
4
5
1
0000-GXX-4634-A0
4
32
1
0000-GXX-4636-A0
English
► Insert the screw (5) and align it so that the screw head is
flush with the lower part of the handle on both sides.
► Screw on the star knob nut (6).
► Press the cable (7) into the holder (8) on both sides.
11.2 Mounting and Removing the Grass Bag
11.2.1 Mounting the Grass Bag
To mount the grass bag:
► Switch off the lawn mower and wait for the cutting blade to
come to a complete stop, @ 15.2.
► Position the lawn mower on a level surface.
► If the side discharge cover is still mounted, remove it.
► If the mulch insert plug is still mounted, remove it.
► Close the rear discharge cover.
11.3 Inserting and Removing the Mulch Insert
11.3.1 Installing the Mulch Insert
To install the mulch insert:
► Switch off the lawn mower, @ 15.2.
► Remove the fuse key and battery, @ 13.2 and @ 14.2.
► Position the lawn mower on a level surface.
► Open the rear discharge cover (1) and hold it in position.
► Hold the mulch insert (2) by the handle (3) and fit it
securely in the rear discharge chute (4).
► Close the rear discharge cover.
► Open the rear discharge cover (1) and hold it in position.
► Hold grass bag (2) by its handle (3) and engage the
hooks (4) on the rod (5).
► Close the rear discharge cover.
11.2.2 Removing the Grass Bag
To remove the grass bag:
► Switch off the lawn mower and wait for the cutting blade to
come to a complete stop, @ 15.2.
► Position the lawn mower on a level surface.
► Open the rear discharge cover and hold it in position.
► Hold grass bag by its handle and unhook it upwards.
0458-818-8621-A
11.3.2 Removing the Mulch Insert
To remove the mulch insert:
► Switch off the lawn mower, @ 15.2.
► Remove the fuse key and battery, @ 13.2 and @ 14.2.
► Position the lawn mower on a level surface.
► Open the rear discharge cover and hold it in position.
► Grip the mulch insert by the handle and take it out of the
rear discharge chute.
► Close the rear discharge cover.
21
English
11.4 Mounting and Removing the Side Discharge
Guide
11.4.1 Installing the Side Discharge Guide
To install the side discharge guide:
► Switch off the lawn mower, @ 15.2.
► Remove the fuse key and battery, @ 13.2 and @ 14.2.
► Position the lawn mower on a level surface.
4
1
12 Adjusting the Lawn Mower
1
► Open the side discharge cover (1) and hold it in position.
► Unhook the side discharge guide (2) upwards.
► Close the side discharge cover.
2
0000-GXX-4637-A0
3
2
► Open the side discharge cover (1) and hold it in position.
► Line up the recesses (2) in the side discharge guide (3)
below the pins (4).
► Close the side discharge cover.
The mulch insert must be mounted when the side discharge
guide is installed.
11.4.2 Removing the Side Discharge Guide
To remove the side discharge guide:
► Switch off the lawn mower, @ 15.2.
► Remove the fuse key and battery, @ 13.2 and @ 14.2.
► Position the lawn mower on a level surface.
12 Adjusting the Lawn Mower
0000-GXX-4635-A0
12.1 Unfolding and Adjusting the Handle
WARNING
Be sure not to pinch, kink or stress the control cables when
folding or unfolding the handle. Damaging the cable could
impact the activation and operation of the lawn mower and
result in an unsafe operating condition.
To unfold the handle:
► Switch off the lawn mower, @ 15.2.
► Remove the fuse key and battery, @ 13.2 and @ 14.2.
► Position the lawn mower on a level surface.
22
0458-818-8621-A
12 Adjusting the Lawn Mower
4
5
90°
90°
6
0000-GXX-7734-A0
1
2
English
To adjust the handle:
2
► Unfold the upper part of the handlebar (1).
► Tighten down the knobs (2).
3
4
90°
► Rotate the handle knobs (3) 90°.
► Fully unfold the handle (4).
The handle can be adjusted to suit the height and reach of
the operator.
0000-GXX-7732-A0
► Align the handle (4) so that the bolts of the levers (5 and
6) are in alignment with the desired position.
► Turn both handle knobs 90°.
The bolts of both handle knobs engage in the holes at the
same position.
12.2 Folding the Handle
WARNING
Be sure not to pinch, kink or stress the control cables when
folding or unfolding the handle. Damaging the cable could
impact the activation and operation of the lawn mower and
0000-GXX-7733-A0
result in an unsafe operating condition.
To fold the handle:
► Switch off the lawn mower, @ 15.2.
► Remove the fuse key and battery, @ 13.2 and @ 14.2.
► Position the lawn mower on a level surface.
0458-818-8621-A
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English
1
3
5
4
2
90°
90°
0000-GXX-7736-A0
13 Inserting and Removing the Fuse Key
90°
2
1
3
90°
► Hold the handle (1) and turn both handle knobs (2) 90°
one after the other.
► Fold the handle. Make sure not to pinch any cable when
folding the handle.
► Turn both handle knobs (2) 90°.
► Press the handle (1) upwards until the bolts (4 and 5) of
the handle knobs (2 and 3) engage and the handle is
securely fixed.
7
6
0000-GXX-7735-A0
► Loosen the knobs (6).
► Fold the upper part (7) of the handle. Make sure not to
pinch any cable when folding the upper part of the handle.
NOTICE
Be sure not to pinch, kink or stress the control cables when
folding or unfolding the handle. Damaging the cable could
impact the activation and operation of the lawn mower.
6
13 Inserting and Removing the Fuse Key
13.1 Inserting the Fuse Key
WARNING
To reduce the risk of severe personal injury from unintended
activation, never store the fuse key in the lawn mower.
The motor can be started only when the fuse key is inserted.
0000-GXX-7737-A0
24
0458-818-8621-A
14 Inserting and Removing the Battery
English
To insert the fuse key:
► Place the lawn mower on a level surface.
1
3
2
► Lift the battery compartment cover (1) and hold it.
► Squeeze the fuse key (2) and insert the fuse key into the
fuse key socket (3) with even, steady pressure until it
stops. Inserting the fuse key enables the flow of electrical
power from the battery to the motor.
► Close the battery compartment cover.
13.2 Removing the Fuse Key
WARNING
To reduce the risk of severe personal injury from unintended
activation, always remove the fuse key and battery before
assembling, transporting, adjusting, cleaning, servicing,
maintaining or storing the lawn mower and any other time it
is not in use.
To remove the fuse key:
► Switch off the lawn mower, @ 15.2.
► Place the lawn mower on a level surface.
► Lift the battery compartment cover and hold it.
► Remove the fuse key with even, steady pressure.
► Close the battery compartment cover.
► Store the fuse key away from the lawn mower in a safe
place that is inaccessible to children and other
unauthorized users.
14 Inserting and Removing the Battery
14.1 Inserting the Battery
WARNING
Never use a malfunctioning, damaged, cracked, leaking or
deformed battery, @ 6. Use and store the battery only
within an ambient temperature range of 14 °F to 122 °F (- 10
°C to 50 °C), @ 6.
WARNING
To reduce the risk of unintended activation, never store the
0000-GXX-4639-A1
battery in the lawn mower, @ 21.2.
To insert the battery:
► Place the lawn mower on a level surface.
1
► Lift the battery compartment cover (1) and hold it.
2
3
0000-GXX-4646-A2
4
0000-GXX-4647-A2
0458-818-8621-A
25
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