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5 Preparing the Lawn Mower for Operation
cleaned correctly, components may no longer function 
properly or safety devices may be rendered inoperative. 
This can result in serious injuries.
► Clean the mower, cutting blade and battery as 
described in this instruction manual.
■ If the mower, cutting blade or battery are not serviced 
correctly, components may no longer function properly or 
safety devices may be rendered inoperative. This can 
result in serious or fatal injuries.
► Do not attempt to service or repair the mower or battery.
► If the mower or the battery require servicing or repairs: 
Contact your STIHL servicing dealer for assistance.
► Maintain the blade as described in this instruction 
manual.
■ The user can be cut by the sharp cutting edges while 
cleaning, maintaining or repairing the cutting blade. This 
can result in personal injury.
► Wear work gloves made of durable material.
5.1 Preparations
Perform the following steps before starting work:
► Make sure the following components are in a safe 
condition:
–Mower, @ 4.6.1.
– Blade, @ 4.6.2.
– Battery, @ 4.6.3.
► Check the battery, @ 12.3.
► Fully charge the battery, @ 6.1.
► Clean the mower, @ 17.2.
► Check the blade, @ 12.2.
► Mount the handle, @ 7.1.
► Unfold and adjust the handle, @ 8.1.
► If you want to mow and collect the grass cuttings in the 
grass box:
► Remove the chute, @ 7.3.2.
► Remove the mulch plug, @ 7.3.2.
► Fit the grass box, @ 7.2.1.
► If you want to mow and discharge the grass cuttings 
sideways:
► Remove the mulch plug, @ 7.3.2.
► Remove the grass box, @ 7.2.2.
► Fit the side chute, @ 7.4.1.
► If you want to mulch:
► Remove the chute, @ 7.4.2.
► Remove the grass box, @ 7.2.2.
► Fit the mulch plug, @ 7.3.1.
► Adjust cutting height, @ 13.2.
► Check the controls, @ 12.1.
► If 3 LEDs flash red while you are checking the controls: 
Remove the activation key and battery, and contact 
your STIHL servicing dealer for assistance.
There is a malfunction in the mower.
► If you cannot carry out these steps: Do not use your 
mower and contact your STIHL servicing dealer for 
assistance.
6.1 Charging the Battery
The charging time depends on several factors, e.g. 
temperature of the battery or the ambient temperature. The 
actual charging time may differ from the specified charging 
time. For specified charging times see www.stihl.com/
charging-times.
► Recharge the battery fully as described in the instruction 
manual for the STIHL AL 101, 300, 500 chargers.
5 Preparing the Lawn Mower for 
Operation
6 Charging the Battery, LEDs