FS 70 RC
English
20
STIHL TrimCut 31-2,    
STIHL FixCut 25-2,    
STIHL PolyCut 20-3
N Screw the mowing head 
counterclockwise on to the shaft (1) 
as far as stop.
N Block the shaft.
N Tighten down the mowing head.
NOTICE
Remove the tool used to block the shaft.
Removing the mowing head
N Block the shaft.
STIHL SuperCut 20-2, 
STIHL AutoCut 25-2, 
STIHL AutoCut C 25-2, 
STIHL TrimCut 31-2,    
STIHL FixCut 25-2,    
STIHL PolyCut 20-3
N Unscrew the mowing head 
clockwise.
Adjusting nylon line
STIHL SuperCut
Fresh line is advanced automatically if 
remaining line is still at least 2.4 in 
(6 cm) long. The blade on the deflector 
trims surplus line to the correct length.
STIHL AutoCut
N Hold the rotating mowing head 
above the ground – tap it on the 
ground once – about 1.2 in (3 cm) 
fresh line is advanced.
The blade on the deflector trims surplus 
line to the correct length – avoid tapping 
the mowing head more than once at a 
time.
Line feed operates only if both lines still 
have a minimum length of 1 in (2.5 cm).
All other mowing heads
Refer to the instructions supplied with 
the mowing head.
WARNING
To reduce the risk of injury, always shut 
off the engine before adjusting the 
mowing line by hand.
Replacing nylon line or cutting blades
Refer to the instructions supplied with 
the mowing head.
Mounting metal cutting attachments
The nut (1), rider plate (2) and thrust 
washer (3) are required to mount a 
grass cutting blade. The parts are 
available as special accessories.
Check direction of rotation of cutting 
attachment
Cutting edges of grass cutting blade (1) 
may point in either direction.
Cutting edges of grass cutting blade (2) 
must point clockwise.