Stihl RMA 339 User manual

STIHL RMA 339, RMA 339 C
Instruction manual
EN
RMA 339.0 RMA 339.0 C
B

0478 131 8327 B. E20 © 2020 STIHL Tirol GmbH

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0478 131 8327 B
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0478 131 8327 B
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0478 131 8327 B - EN
Dear Customer,
Thank you for choosing STIHL. We
develop and manufacture our quality
products to meet our customers'
requirements. The products are designed
for reliability even under extreme
conditions.
STIHL also stands for premium service
quality. Our specialist dealers guarantee
competent advice and instruction as well
as comprehensive service support.
We thank you for your confidence in us
and hope you will enjoy working with your
STIHL product.
Dr. Nikolas Stihl
IMPORTANT: READ BEFORE USE AND
KEEP IN A SAFE PLACE.
Printed on chlorine-free bleached paper. Paper is recyclable. Cover is halogen free.
1. Table of contents
Notes on the instruction manual 4
General 4
Instructions for reading the
instruction manual 4
Country-specific versions 5
Machine overview 6
For your safety 7
General 7
Clothing and equipment 8
Battery 8
Charger 9
Charging 9
Transporting the machine 10
Transporting the battery 10
Before operation 10
Working with your machine 11
Maintenance, cleaning, repairs and
storage 12
Storage for prolonged periods
without operation 13
Disposal 13
Description of symbols 13
Standard equipment 15
Preparing the machine for
operation 16
General points 16
Installing the mono handlebar
(RMA 339 C) 16
Installing the dual handlebar
(RMA 339) 17
Assembling the grass catcher box 17
Battery and charger 18
General 18
Connecting the charger to the
mains 18
Removing/inserting the battery 18
Charging the battery 19
LEDs on the battery 19
LED on the charger 20
Controls 20
Battery compartment 20
Safety plug 20
Eco mode switch 21
Adjusting the mono handlebar
(RMA 339 C) 21
Folding down the dual handlebar
(RMA 339) 21
Central cutting height adjustment 22
Grass catcher box 22
Level indicator 23
Notes on working with the
machine 23
General 23
Cutting performance 23
Working area for operator 23
Correct motor load 24
If the mowing blade blocks 24
Thermal motor overload protection 24
Safety devices 24
Safety plug 24
Safety devices 24
Two-hand operation 24
Motor run-down brake 24
Operating the machine 24
Preparatory measures 24
Switching the lawn mower on 24
Switching the lawn mower off 25
Emptying the grass catcher box 25
Maintenance 26
General 26
Cleaning the machine 26
Electric motor and wheels 27

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2.1 General
This instruction manual constitutes
original manufacturer’s instructions in
the sense of EC Directive 2006/42/EC.
STIHL is continually striving to further
develop its range of products; we therefore
reserve the right to make alterations to the
form, technical specifications and
equipment level of our standard
equipment.
For this reason, the information and
illustrations in this manual are subject to
alterations.
This instruction manual may describe
models that are not available in all
countries.
This instruction manual is protected by
copyright. All rights reserved, especially
the right of reproduction, translation and
processing using electronic systems.
2.2 Instructions for reading the
instruction manual
Illustrations and texts describe specific
operating steps.
All symbols which are affixed to the
machine are explained in this instruction
manual.
Viewing direction:
Viewing direction when "left" and "right"
are used in the instruction manual:
the user is standing behind the machine
and is looking forwards in the direction of
travel.
Section reference:
References to relevant sections and
subsections for further descriptions are
made using arrows. The following example
shows a reference to a section: (Ö3.)
Designation of text passages:
The instructions described can be
identified as in the following examples.
Operating steps which require intervention
on the part of the user:
●Release bolt (1) using a screwdriver,
operate lever (2)...
General lists:
– Use of the product for sporting or
competitive events
Texts with added significance:
Text passages with added significance are
identified using the symbols described
below in order to especially emphasise
them in the instruction manual:
Illustrations with text passages:
Operating steps relating directly to the
illustration can be found immediately after
the illustration, with a corresponding
reference to the item numbers.
Example:
Battery 27
Charger 27
Checking blade wear 27
Removing and installing the
mowing blade 28
Sharpening the mowing blade 28
Storage (winter break) 28
Transport 29
Carrying and securing the lawn
mower 29
Transporting the battery 30
Minimising wear and preventing
damage 30
Environmental protection 31
Standard spare parts 31
Technical specifications 31
STIHL AK battery 32
STIHL charger AL 101 32
Troubleshooting 32
Service schedule 34
Handover confirmation 34
Service confirmation 34
2. Notes on the instruction
manual
Danger
Risk of accident and severe injury
to persons. A certain type of
behaviour is necessary or must be
avoided.
Warning
Risk of injury to persons. A certain
type of behaviour prevents possible
or probable injuries.
Caution
Minor injuries or material damage
can be prevented by a certain type
of behaviour.
Note
Information for better use of the
machine and in order to avoid
possible operating errors.

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Insert mains plug (1) in socket (2).
Texts relating to illustrations:
Illustrations relating to use of the machine
can be found in the front of this instruction
manual.
The camera symbol serves to link
the figures on the illustration pages
with the corresponding text
passages in the instruction manual.
2.3 Country-specific versions
STIHL supplies chargers with different
plugs and switches, depending on the
country of sale.
Chargers with European plugs are shown
in the illustrations. Chargers with other
types of plug are connected to the mains in
a similar way.
1

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3. Machine overview

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0478 131 8327 B - EN
4.1 General
These safety regulations must
be observed when working with
the machine.
Read the entire instruction
manual before using the
machine for the first time. Keep
the instruction manual in a safe
place for future reference.
These safety precautions are essential for
your safety, however the list is not
exhaustive. Always use the machine in a
reasonable and responsible manner and
be aware that the user is responsible for
accidents involving third parties or their
property.
Make sure that you are familiar with the
controls and use of the machine.
The machine must only be used by
persons who have read the instruction
manual and are familiar with operation of
the machine. The user should seek expert
and practical instruction prior to initial
operation. The user must receive
instruction on safe use of the machine
from the vendor or another expert.
During this instruction, the user should be
made aware that the utmost care and
concentration are required for working with
the machine.
Residual risks persist even if you operate
this machine according to the instructions.
Only give or lend the machine, including
any accessories, to persons who are
familiar with this model and how to operate
it. The instruction manual forms part of the
machine and must always be provided to
persons borrowing it.
Make sure that the user is physically,
sensorily and mentally capable of
operating the machine and working with it.
If the user is physically, sensorily or
mentally impaired, the machine must only
be used under supervision or following
instruction by a responsible person.
Make sure that the user is of legal age or
being trained under supervision in a
profession in accordance with national
regulations.
The machine must only be operated by
persons who are well rested and in good
physical and mental condition. If your
health is impaired, you should consult your
doctor to determine whether working with
the machine is possible. The machine
should not be operated after the
consumption of alcohol, drugs or
medications which impair reactions.
The machine is intended for private use.
Caution – risk of accident:
The machine is only intended for mowing
lawns. Its use for other purposes is not
permitted and may be dangerous or result
in damage to the machine.
Due to the physical danger to the user, the
machine must not be used for the following
applications (incomplete list):
– for trimming bushes, hedges and
shrubs,
– for cutting creepers,
– for the care of lawn roofs and balcony
boxes,
– for shredding or chopping tree or hedge
cuttings,
– for clearing paths (vacuuming,
blowing),
– for levelling earth mounds, e.g. mole
hills,
– for transporting clippings, except in the
grass catcher box intended for this
purpose.
For safety reasons, any modification to the
machine, except the proper installation of
accessories approved by STIHL, is
1Upper handlebar
2Lower handlebar (RMA 339)
3Bracket (RMA 339 C)
4Housing
5Motor hood
6Rear wheel
7Front wheel
8Grass catcher box
9Upper transport handle
10 Lower transport handle
11 Discharge flap
12 Rotary handle (RMA 339)
13 Handlebar detent lever (RMA 339 C)
14 Level indicator (grass catcher box)
15 Motorstop lever
16 Height adjustment lever
17 ON button
18 Rating plate with machine number
19 Cover
20 Safety plug
21 Eco mode switch
22 Battery
23 Charger
4. For your safety
Risk of death from suffocation!
Packaging material is not a toy -
danger of suffocation! Keep
packaging material away from
children.

0478 131 8327 B - EN
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forbidden and results in voiding of the
warranty cover. Information regarding
approved accessories can be obtained
from your STIHL specialist dealer.
In particular, any tampering with the
machine which increases the power output
or speed of the engine or motor is
forbidden.
It is not permissible to make any
modifications to the machine that could
lead to increased noise emissions.
It is not permitted to transport objects,
animals or persons, particularly children,
on the machine.
Particular care is required during use in
public green spaces, parks, sports fields,
along roads and in agricultural and forestry
businesses.
Caution! Danger to health due
to vibrations. Excessive
exposure to vibrations can
result in damage to the
cardiovascular or nervous system,
particularly in persons with cardiovascular
problems. Please consult a physician if
you experience symptoms that may have
been caused by vibrational loads.
Symptoms of this kind principally affect the
fingers, hands or wrists and include
(incomplete list):
– numbness,
– pain,
– muscular weakness,
– skin discolouration,
– unpleasant tingling sensation.
Hold the handlebar tightly, but not tensed,
with both hands in the designated
locations during operation.
Plan your working times so that more
severe physical strains over a longer
period are avoided.
4.2 Clothing and equipment
Always wear sturdy footwear
with high-grip soles when
working. Never work barefoot
or, for example, in sandals.
Also always wear sturdy gloves
and tie up and secure long hair
(headscarf, cap, etc.) when
performing maintenance and
cleaning work or when transporting the
machine.
Wear suitable safety glasses
when sharpening the mowing
blade.
Always wear long trousers and
tight-fitting clothing when operating the
machine.
Never wear loose clothes which may
become caught on moving parts (control
levers) – do not wear jewellery, ties or
scarves.
4.3 Battery
Children cannot recognise or evaluate the
dangers posed by batteries. There is a risk
of serious injury to children.
●Keep children away.
●Keep the battery out of the reach of
children.
The battery is not protected against all
ambient conditions. If exposed to certain
ambient conditions, the battery may catch
fire or explode. Persons could be injured or
property damaged.
●Protect the battery against
heat or fire.
●Do not throw the battery into a
fire.
●Observe the permissible
temperature range for the
battery. (Ö18.1)
●Keep the battery away from
metallic objects.
●Protect the battery against
rain and moisture. Do not
immerse in liquids.
●Do not subject the battery to
high pressure.
●Do not subject the battery to
microwaves.
●Protect the battery against chemicals
and salts.
●Do not drop the battery.
●Keep the battery clean and dry.
●Store the battery in a locked, room.
●Store the battery away from the lawn
mower and from the charger.
●Keep the battery in electrically non-
conductive packaging.
●Store the battery within the permissible
temperature range. (Ö18.1)
The battery is in good operating
condition when the following conditions
are met:
– The battery is not damaged.
– The battery is clean and dry.
– The battery is operative and has not
been modified.

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The battery can not operate safely if it is
not in good operating condition. There is a
risk of serious injury to persons.
●Do not work with a damaged or
defective battery.
●Do not charge a damaged or defective
battery.
●If the battery is dirty or wet: clean the
battery and allow it to dry.
●Do not modify the battery.
●Do not insert any objects into the
apertures in the battery.
●Never connect the battery terminals
with metallic objects and cause a short
circuit.
●Do not open the battery.
Fluid may escape from a damaged battery.
If the fluid enters into contact with the skin
or eyes, this may cause irritation.
●Avoid contact with the fluid.
●In the event of contact with the skin:
Wash the affected areas with plenty of
soap and water.
●In the event of contact with the eyes:
Rinse the eyes with plenty of water for
15 minutes and seek medical attention.
A damaged or defective battery may emit
a strange odour, smoke, or catch fire.
Persons could be seriously or fatally
injured and property may be damaged.
●If the battery emits a strange odour or
smokes: Do not use the battery and
keep it away from flammable materials.
●If the battery catches fire: extinguish the
battery using a fire extinguisher or
water.
4.4 Charger
Children cannot recognise or evaluate the
dangers posed by the charger or by
electrical current. There is a risk of serious
injury to children.
●Keep children away.
●Keep the charger out of the reach of
children.
The charger is not protected against all
ambient conditions. If exposed to certain
ambient conditions, the charger may catch
fire or explode. Persons could be injured or
property damaged.
●Do not operate the charger in a highly
flammable or explosive environment.
●Do not operate the charger on a highly
flammable surface.
●Observe the permissible temperature
range for the charger.
●Operate the charger in a dry
and locked room.
●Store the charger away from
the lawn mower and from the battery.
●Allow the charger to cool down before
putting it into storage.
●Keep the charger clean and dry.
●Store the charger in a locked, room.
The charger is in good operating
condition when the following conditions
are met:
– The charger is not damaged.
– The charger is clean and dry.
– The charger is operative and has not
been modified.
If not in good operating condition,
components can no longer operate
correctly and safety devices may be dis
abled. There is a risk of serious injury to
persons.
●Do not use a damaged or defective
charger. Dispose of the charger.
●If the charger is dirty or wet: clean the
charger and allow it to dry.
●Do not modify the charger.
●Do not insert any objects into the
apertures in the charger.
●Never connect the charger terminals
with metallic objects and cause a short
circuit.
●Do not open the charger.
The electric cable is not intended for
carrying or suspending the charger. The
electric cable and the charger could
become damaged.
●Pick up and hold the charger by the
housing. A recessed grip is provided on
the housing for easy lifting of the
charger.
●Store the charger on the wall bracket.
4.5 Charging
Contact with live components can result
from the following causes:
– The electric cable is damaged.
– The mains plug is damaged.
– The socket is incorrectly installed.
Contact with live components can result in
an electric shock. The user could be
seriously or fatally injured.

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●The mains plug and electric cable are
particularly important when it comes to
electrical safety.
●Insert the mains plug in a correctly
installed socket.
An incorrect mains voltage or an incorrect
mains frequency during charging may lead
to overvoltage in the charger. The charger
could become damaged.
●Ensure that the mains voltage and the
mains frequency of the power supply
correspond to the information contained
in the rating plate on the charger.
A damaged or defective charger may emit
a strange odour or smoke. Persons could
be injured or property damaged.
●Remove mains plug from socket.
In the case of insufficient heat dissipation,
the charger could overheat, causing a fire.
Persons could be seriously or fatally
injured and property may be damaged.
●Do not cover the charger.
●Store the charger on the wall bracket.
If several chargers are connected to a
socket, electrical wires could become
overloaded during charging. The electrical
wires could heat up and cause a fire.
Persons could be seriously or fatally
injured and property may be damaged.
●Only connect one charger to a socket.
●Do not connect a charger to multiple
sockets.
4.6 Transporting the machine
Always wear gloves in order to prevent
injuries due to sharp-edged and hot
components.
Switch off the machine prior to
transport, allow the blade to
come to a standstill and remove the safety
plug.
Only transport the machine once the motor
has cooled down.
Take the weight of the machine into
account and use suitable loading aids
(loading ramps, lifters) if necessary.
Secure the machine and any machine
components being transported (e.g. grass
catcher box) on the load floor using
fastening material of adequate size (belts,
ropes, etc.).
Avoid contact with the mowing blade when
lifting and carrying the machine.
Observe the information in the section
"Transport". It describes how to lift and
lash the machine. (Ö14.)
When transporting the machine, always
observe regional legislation, especially
regarding load security and the transport
of objects on load floors.
4.7 Transporting the battery
The battery is not protected against all
ambient conditions. If exposed to certain
ambient conditions, the battery may
become damaged and property may be
damaged
●Do not transport a damaged battery.
●Transport the battery in the machine, in
electrically non-conductive packaging
or in an electrically non-conductive
transport container.
During transport outside of the machine,
the battery could tip over or move. Persons
could be injured or property damaged.
●Pack the battery in the packaging or
transport container in such a way that it
cannot move.
●Secure the packaging or transport
container so that the packaging or
transport container cannot move.
Do not leave the battery inside a vehicle
and never expose it to direct sunlight.
Lithium-ion batteries must be treated with
special care during transport. In particular,
it must be ensured that short circuits are
prevented during transport of the batteries.
For this reason, keep the original
cardboard packaging of the battery and
always transport STIHL batteries either in
the undamaged original packaging or in
the lawn mower.
4.8 Before operation
Make sure that only persons who are
familiar with the instruction manual are
permitted to use the machine.
Observe the local regulations regarding
permitted operating times for gardening
power tools with electric motors.
Carefully inspect the complete area on
which the machine is to be used and
remove any stones, sticks, wires, bones
and other foreign objects which could be
thrown up by the machine. Obstacles (e.g.
tree stumps, roots) can be easily
overlooked in long grass.
For this reason, mark all foreign objects
(obstacles) which are hidden in the lawn
and cannot be removed before
commencing work with the machine.
All faulty, worn or damaged parts must be
replaced before using the machine.
Replace any illegible or damaged danger
signs and warnings on the machine. Your

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STIHL specialist has a supply of
replacement stickers and all the other
spare parts.
The machine must only be used in good
operating condition. Before each use,
check whether:
– The machine is properly assembled.
– The cutting tool and the entire cutting
unit (mowing blade, fastening elements,
mowing deck housing) are in good
condition. In particular check for secure
fastening, damage (notches or cracks)
and wear.
– The safety devices (e.g. discharge flap,
housing, handlebar, motorstop lever)
are in good condition and working
properly.
– The grass catcher box is undamaged
and correctly installed; a damaged
grass catcher box must not be used.
– The run-down brake of the electric
motor is functioning.
Carry out any necessary work or consult a
specialist dealer. STIHL recommends
STIHL specialist dealers.
Never switch the motor on without a
correctly installed blade. Risk of motor
overheating.
Follow the instructions in the "Battery"
(Ö4.3) and "Charger" (Ö4.4) sections.
4.9 Working with your machine
Never work when animals or
persons, particularly children,
are in the danger area.
Do not work at ambient temperatures
below +5°C (41°F).
Only work during the day or with good
artificial light.
Do not operate the machine in the rain or
during thunder storms, particularly when
there is a risk of lightning strike.
Caution – risk of injury!
Never put hands or feet on or
underneath rotating parts.
Never touch the rotating blade.
Always keep away from the discharge
opening.
Always observe the safety distance
provided by the handlebar. The handlebar
must always be installed correctly and
must not be modified. Never operate the
machine with the handlebar folded down.
The switch and safety devices installed in
the machine must not be removed or
bypassed. In particular, never secure the
motorstop lever to the handlebar (e.g. by
tying it).
Never attach any objects to the handlebar
(e.g. work clothing).
The risk of accidents is higher if the ground
is damp due to increased danger of
slipping.
Particular caution should be exercised
during working in order to prevent slipping.
If possible, avoid using the machine when
the ground is damp.
Do not leave the machine in the rain.
Always keep the battery compartment
closed during operation.
Switching on the machine:
Exercise care when switching on the
machine and observe the instructions in
the section "Initial operation of the
machine". (Ö12.)
Keep your feet a safe distance from the
cutting tool.
Place the machine on an even surface
before switching it on.
The machine must not be tilted before it is
switched on or during switching-on.
Do not switch on the motor if the discharge
chute is not covered by the discharge flap
or the grass catcher box.
Avoid switching the machine on repeatedly
within a short period of time; in particular
avoid "playing" with the ON button. Risk of
motor overheating.
Working on slopes:
Always work across and back on slopes,
never up and down.
If the user loses control when mowing up
and down, there is a risk of being run over
by the machine.
Be particularly careful when changing
direction on a slope.
Always ensure good stability on slopes
and avoid mowing on excessively steep
slopes.
For safety reasons, the machine must not
be used on slopes with an inclination of
more than 25° (46.6%). Risk of injury!
A slope inclination of 25° corresponds to a
vertical height increase of 46.6 cm for a
100 cm horizontal distance.

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Working:
Caution – risk of injury!
Never put hands or feet on or
underneath rotating parts.
Never touch the rotating blade.
Always keep away from the discharge
opening. Always observe the safety
distance provided by the handlebar.
Do not try to examine the blade
while the machine is operating.
Never open the discharge flap
and/or remove the grass catcher box when
the mowing blade is running. Rotating
blades can cause injury.
Only operate the machine at walking
speed – never run when working with the
machine. Working quickly with the
machine increases the risk of injury due to
stumbling, slipping, etc.
Be particularly careful when turning the
machine around or pulling it towards you.
Risk of stumbling!
Objects hidden in the turf (lawn sprinkler
systems, posts, water valves, foundations,
electrical wires, etc.) must be avoided.
Never run over any such foreign objects.
If the cutting tool or the machine hits an
obstacle or a foreign object, the motor
must be switched off, the safety plug
disconnected and an inspection performed
by a specialist.
Beware of the cutting tool
running on for several seconds
before coming to a standstill.
Switch off the motor,
– if tilting of the machine is necessary
when transporting over surfaces other
than grass,
– when pushing the machine to and from
mowing areas,
– before removing the grass catcher box,
– before adjusting the cutting height.
Switch off the motor, disconnect
the safety plug and ensure that
the cutting tool has come to a complete
standstill
– before removing the battery;
– before leaving the machine unattended;
– before transporting, lifting, or carrying
the machine;
– before remedying blockages, including
those in the discharge chute;
– before you check, clean or carry out
work on the machine (e.g. folding down
or adjusting the handlebar);
– if the cutting tool has hit a foreign object.
The cutting tool needs to be checked for
possible damage. The machine must
not be operated with a damaged or bent
blade shaft or motor shaft. Risk of
injury through defective parts!
– if the machine begins to vibrate
excessively. In this case, the complete
machine, in particular the cutting tool,
must be checked for possible damage
and loose parts. Damaged parts must
be replaced prior to further use, loose
parts must be fastened/tightened.
4.10 Maintenance, cleaning, repairs
and storage
Before performing work on the machine,
before adjusting or cleaning
●Switch off the motor
●Remove the safety plug
●Remove the battery if
necessary
Allow the machine to fully cool down
before storing it in enclosed places,
performing maintenance on it or cleaning
it.
Cleaning:
The complete machine must be cleaned
thoroughly following use. (Ö13.2)
Remove accumulated clipping deposits
using a stick. Clean the underside of the
mower with water and a brush.
Never use high-pressure cleaners and do
not clean the machine under running water
(e.g. using a garden hose).
Do not use aggressive cleaning agents.
These can damage plastics and metals,
impairing the safe operation of your STIHL
machine.
In order to prevent overheating and fire
hazards, keep the areas around the air
vents on the top of the machine (between
the motor hood and housing) and the
machine underside (in the discharge
chute) free from dirt (e.g, grass, straw,
moss, leaves or escaping grease).
Maintenance operations:
Only maintenance operations described in
this instruction manual may be carried out.
Have all other work performed by a
specialist dealer.
If you do not have the necessary expertise
Risk of injury!
Strong vibration is normally an
indication of a fault.
In particular, the machine must not
be operated with a damaged or
bent blade shaft or mowing blade.
If you do not have the appropriate
expertise, have the necessary
repairs carried out by a specialist
dealer (STIHL recommends STIHL
specialist dealers).

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0478 131 8327 B - EN
or auxiliary equipment, please always
contact a specialist dealer.
STIHL recommends that you have
maintenance operations and repairs
performed exclusively by a STIHL
specialist dealer.
STIHL specialist dealers regularly attend
training courses and are provided with
technical information.
Only use tools, accessories or
attachments approved for this machine by
STIHL or technically identical parts.
Otherwise, there may be a risk of
accidents resulting in personal injury or
damage to the machine. If you have any
questions, please consult a specialist
dealer.
The characteristics of original STIHL tools,
accessories and spare parts are optimally
adapted to the machine and the user's
requirements. Genuine STIHL spare parts
can be recognised by the STIHL spare
parts number, by the STIHL lettering and,
if present, by the STIHL spare parts
symbol. On smaller parts, only the symbol
may be present.
Always keep warning and information
stickers clean and readable. Damaged or
missing stickers must be replaced by new,
original plates from your STIHL specialist
dealer. If a component is replaced with a
new component, ensure that the new
component is provided with the same
stickers.
Regularly check that the mowing blade is
securely fastened and is not damaged or
worn.
Only perform work on the cutting unit when
wearing thick work gloves and exercising
extreme care.
Ensure that all nuts, pins and screws (in
particular the blade fastening screw) are
securely tightened so that the machine is
in a safe operating condition.
Check the complete machine and the
grass catcher box for wear or damage on
a regular basis, particularly before
extended periods when the machine is not
in use (e.g. over winter). For safety
reasons, worn or damaged parts must be
replaced immediately to ensure that the
machine is always in a safe operating
condition.
Components or guards that are removed
for maintenance operations must be
properly reinstalled immediately.
4.11 Storage for prolonged periods
without operation
Store the cooled machine, the battery and
the safety plug separately from each other
in a dry and locked room that is
inaccessible to children.
Ensure that the machine is protected from
unauthorised use (e.g. by children).
Thoroughly clean the machine before
storage (e.g. winter break).
Store the machine in good operational
condition.
4.12 Disposal
Ensure that old machines (lawn mower,
battery, charger, accessories) are properly
disposed of. Render the lawn mower
unusable prior to disposal. In order to
prevent accidents, ensure that you remove
the safety plug and the electric cable from
the switch to the motor.
Risk of injury due to the cutting tool!
Always store an old machine in a safe
place prior to scrapping. Ensure that the
machine and the cutting tool are kept out
of the reach of children.
Batteries must be disposed of separately
from the machine. Ensure that batteries
are discharged prior to disposal (e.g. by
running the motor) and that they are
disposed of safely and in an
environmentally friendly manner.
5. Description of symbols
Caution!
Read the instruction man-
ual before initial use.
Risk of injury!
Keep other persons out of
the danger area.
Caution –
sharp cutting blades!
The cutting blades run on
after the motor has been
switched off. Remove the
locking device (safety plug)
before performing mainte-
nance work.
RMA 339:
Start the motor.

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RMA 339 C:
Start the motor.
RMA 339 C:
Switch off the motor.
Battery is overheated.
Charging starts after the
cooling-down period or
the battery can only be
used after the cooling-
down period.
The battery is faulty and
must be replaced.

EN
15
0478 131 8327 B - EN
RMA 339 C:
RMA 339:
6. Standard equipment
Item Designation Qty.
ABasic unit 1
BUpper part of grass catcher
box
1
CLower part of grass catcher
box
1
DStud 2
MSafety plug 1
NCharger
OBattery
xInstruction manual 1
ESleeve 1
FBolt 1
GWasher 2
HNut 1
IFlat head bolt 2
JCable guide 1
KRotary handle 2
The standard equipment may vary
depending on the country where
sold and version type.

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16
7.1 General points
●Place the machine on level, firm ground
when performing all the operations
described.
●Charging the battery (Ö8.4).
7.2 Installing the mono handlebar
(RMA 339 C)
●1Insert sleeve (E) in the bore on
handlebar (1).
●2Fit two washers (G) with the convex
side facing inwards onto the sleeve.
●3Hold sleeve (E) and washers (G)
and insert together with handlebar (1)
into bracket (2).
●4Insert nut (H) into the bracket as
shown.
●5Insert bolt (F) from the outside
inwards through the bores in
handlebar (1) and in bracket (2).
●6Tighten bolt (F).
Tightening torque:
18 - 22 Nm
Installing the electric cable:
●Insert the electric cable as shown into
cable guide (3),
●press into the holder on handlebar (4)
and
●fasten to the handlebar using cable
clip (5).
7. Preparing the machine for
operation
Risk of injury.
Observe the safety instructions in
the section "For your safety" (Ö4.).
Remove the safety plug,
particularly before
performing any work on the lawn
mower (Ö9.2).
The batteries are charged to
approx. 30% on delivery. They must
be therefore be charged before
being used for the first time.

EN
17
0478 131 8327 B - EN
7.3 Installing the dual handlebar
(RMA 339)
Installing the upper handlebar:
●1 Insert flat head bolt (I) through cable
guide (J) and attach electric cable (1).
●2 Fit dual handlebar (2) onto both
lower handlebar sections (3).
●3 Insert flat head bolts (I) – on right
with cable guide (J), on left without –
through the bores from the inside
outwards.
●4 Tighten with rotary handles (K).
Installing cable clip:
●Install cable clip (4) on the upper
handlebar. Insert electric cable (1) as
shown.
●Close tab (5) and allow it to engage.
Distance between the cable clip and
switch:
25 - 27 cm
7.4 Assembling the grass catcher box
●Fit upper part of grass catcher box (B)
onto lower part of grass catcher
box (C). Ensure correct location in the
guides.
●Push stud (D) through the bores
provided from the inside.
●Allow upper part of grass catcher
box (B) to engage in the lower part of
the grass catcher box using slight
pressure.
●Attach the grass catcher box (Ö9.7).

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8.1 General
The RMA 339, RMA 339 C lawn mowers
are operated with rechargeable STIHL AK
type lithium-ion batteries only.
The batteries supplied are optimally
adapted to the intended purpose,
however, all STIHL AK type batteries can
be used.
The lawn mower electronics exchange
data with the installed battery and adapt
the power of the electric motor to the
relevant capacity.
8.2 Connecting the charger to the
mains
●Insert mains plug (1) in socket (2).
●After connection of the charger to the
power supply, a self-test is performed.
During this process, LED (3) on the
charger illuminates green for approx.
1 second, then red and then
extinguishes again (Ö8.6).
8.3 Removing/inserting the battery
●Remove the safety plug
(Ö9.2) and hold the battery
compartment cover in the
open position.
Removing the battery:
●Push locking lever (1) towards the
battery and remove battery (2)
upwards.
8. Battery and charger