0458-713-8221-A
13
English 
5 IMPORTANT SAFETY INSTRUCTIONS
– Switch off the motor immediately if you are 
approached while working with the trimmer.
■ Your trimmer is equipped with a deflector. To reduce the 
risk of personal injury from thrown objects and contact 
with the cutting attachment:
■ This trimmer is designed for use only with the STIHL 
AutoCut 2-2 mowing head, which may be operated only 
with the specified nylon line. Use of metal cutting 
attachments, wire or metal-reinforced line or other non-
approved cutting attachments is not authorized and could 
be extremely dangerous.
■ To reduce the risk of severe personal injuries from 
unintentional starting: 
– Remove the battery before installing or adjusting the 
bump guard.
■ A damaged or loose cutting attachment or mowing head 
may vibrate, crack, break or come off the trimmer, which 
may result in serious or fatal injury.
– Make sure the cutting attachment and mowing head 
are properly tightened before starting work.
– Check the tightness and condition of the cutting 
attachment and mowing head before starting work 
and any time trimming behavior changes during use. 
Always switch off the motor, wait for the cutting 
attachment to stop and remove the battery before 
inspecting the trimmer or its cutting attachment.
– If the mowing head or cutting attachment loosens 
after being properly tightened, stop work 
immediately and have the trimmer inspected by your 
authorized STIHL servicing dealer.
– Never use a trimmer with a loose mowing head or 
cutting attachment.
■ A cracked, damaged or worn out mowing head may 
shatter at high speeds and cause serious or fatal injury.
– Have a cracked, damaged or worn out mowing head 
replaced immediately, even if damage appears to be 
limited to superficial cracks.
DANGER
■ To reduce risk of electrocution:
– Never operate the trimmer with a 
damaged or missing deflector.
– Keep the deflector properly adjusted at 
all times.
– Never use metal blades or metal-
reinforced line on this trimmer. Use only 
the cutting attachments recommended in 
this manual, in combination with the 
recommended deflector. See 
Combinations of Deflectors and Cutting 
Attachments, @ 25.
– Never touch the cutting attachment or 
mowing head with your hand, feet or any 
other part of your body while the battery 
is inserted, even when the cutting 
attachment is not moving. Keep 
bystanders at least 50 ft. (15 m) away.
– If the mowing head, cutting attachment 
or deflector becomes dirty, clogged or 
stuck, always switch off the motor, make 
sure the cutting attachment has stopped 
and remove the battery before inspecting 
the cutting attachment and deflector. 
Clean dirt, grass, weeds and other 
material from the mowing head and 
deflector at regular intervals, but only 
after removing the battery.