4 Safety Precautions
WARNING
■ If not in safe condition, components may no longer
operate correctly and safety devices may be disabled.
This may result in serous or fatal injury to people.
► Use an undamaged lawn mower.
► If the lawn mower is dirty or wet: clean the lawn mower
and allow it to dry.
► Do not modify the lawn mower.
► If the controls are not working: do not use the lawn
mower.
► If mowing and the mown grass is to be collected in the
grass catcher box: remove the mulch insert, detach the
guide and attach the grass catcher box as described in
this instruction manual.
► If mowing and the mown grass is to be ejected to the
side: detach the grass catcher box, insert the mulch
insert and attach the guide as described in this
instruction manual.
► If mulching: detach the guide and grass catcher box and
insert the mulch insert as described in this instruction
manual.
► Only attach genuine STIHL accessories for this lawn
mower.
► Attach the blade as described in this instruction manual.
► Attach accessories as described in this instruction
manual or in the instruction manual for the accessories.
► Do not insert objects into the apertures in the lawn
mower.
► Never connect the key receptacle terminals to metallic
objects and cause a short circuit.
► Replace worn or damaged warning signs.
► If anything is unclear: consult a STIHL specialist dealer.
0458-819-9921-A
4.6.2
Blade
The blade is in safe condition when the following conditions
are met:
– The blade and attachments are not damaged.
– The blade is not deformed.
– The blade is correctly attached.
– The blade is correctly sharpened.
– The blade is burr-free.
– The blade is correctly balanced.
– The minimum thickness and minimum width of the blade
are not fallen below, @ 22.2.
– The sharpening angle is observed, @ 22.2.
WARNING
■ In unsafe condition, blade parts may come loose and be
expelled. This may result in serious injury to people.
► Use an undamaged blade and attachments.
► Attach the blade correctly.
► Sharpen the blade correctly.
► If the minimum thickness or minimum width are fallen
below: replace the blade.
► Have the blade balanced by a STIHL specialist dealer.
► If anything is unclear: consult a STIHL specialist dealer.
4.6.3
Battery
The battery is in safe condition when the following conditions
are met:
– The battery is not damaged.
– The battery is clean and dry.
– The battery is working and has not been modified.
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