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10.4 Correct motor load
Do not switch the lawn mower on in tall 
grass. Select a higher cutting height 
setting if the motor is difficult to start.
The lawn mower load must never cause 
the motor speed to drop significantly.
If the speed drops when mowing tall grass, 
select a higher cutting height setting 
and/or reduce the speed of propulsion.
10.5 If the mowing blade blocks
Switch off the motor immediately and 
disconnect the safety plug. Then eliminate 
the cause of the fault.
10.6 Thermal motor overload 
protection
The electronics switch off the motor if it 
becomes overloaded during operation. 
Three red LEDs in the battery illuminate if 
a thermal overload occurs. (Ö 8.5)
Causes for an overload:
– blunt mowing blade
– mowing excessively high grass or 
cutting height adjusted too low
– excessive rate of feed
– inadequate cleaning of the cooling air 
guide (inlet slots)
Recommencing operation
Resume normal operation of the machine 
following a cooling period of up to 10 min 
(depending on the ambient temperature). 
(Ö 12.)
The machine is equipped with several 
safety devices for safe operation and for 
the prevention of improper use.
11.1 Safety plug
The motor can only be switched on when 
the safety plug is inserted (Ö 9.2).
11.2 Safety devices
The lawn mower is equipped with safety 
devices, which prevent inadvertent contact 
with the mowing blade and with ejected 
clippings.
These include the housing, discharge flap, 
grass catcher box and correctly installed 
handlebar.
11.3 Two-hand operation
The motor can only be switched on by 
pressing and holding the ON button with 
the right hand and then pulling the 
motorstop lever to the handlebar with the 
left hand.
11.4 Motor run-down brake
When the motorstop lever is released, the 
mowing blade comes to a complete 
standstill in less than three seconds.
An integrated motor run-down brake 
shortens the run-down time until the blade 
stops.
Measuring run-down time
Following motor start-up, the blade rotates 
and a wind noise is audible. The run-down 
time corresponds to the duration of the 
wind noise after the motor stops. This can 
be measured using a stopwatch.
12.1 Preparatory measures
● Charge the battery and insert it into the 
battery compartment. (Ö 8.4)
● Insert the safety plug. (Ö 9.2)
12.2 Switching the lawn mower on
When eco mode is switched on, the 
speed is reduced automatically 
when less power is required. 
(Ö 10.2)
11. Safety devices
Risk of injury!
If a safety device is found to be 
defective, the machine must not be 
operated. Consult a specialist 
dealer; STIHL recommends STIHL 
specialist dealers.
12. Operating the machine
Risk of injury!
Observe the safety instructions in 
the section "For your safety". (Ö 4.)
Do not switch the lawn mower on in 
tall grass. Select a higher cutting 
height setting if the motor is difficult 
to start.