19FCS-KM
English / USA
: Secure arm (4) with screws (3), 
tighten down firmly.
: Slide clamp (2) down drive tube in 
direction of gearbox and tighten the 
screw (1) firmly.
A bent or cracked blade must not be 
straightened or welded – it may break 
completely! Such blades must be 
replaced – see “Fitting the Cutting 
Blade”. 
STIHL recommends the use of genuine 
STIHL cutting blades – see “Special 
Accessories“
: Replace the blade (1) when its 
length (A) is no longer sufficient to 
maintain the necessary ground 
clearance (B) and obtain the 
required depth of cut (C). 
To avoid out-of-balance: 
check cutting blade on STIHL 
balancer – see “Special 
Accessories“.
Do not resharpen the blade!
Checking the Wear Guard
Before every use: 
: Check the wear guard (1) for 
damage.
: The wear guard must be replaced 
as soon as the deflector (2) (arrow) 
becomes visible at the latest.
The gearbox may be seriously 
damaged if you do not replace the 
wear guard in good time.
2
3
4
245BA026 KN
3
1
Replacing the Cutting Blade
245BA027 KN
C
A
B
1
Checking and Replacing 
the Wear Guard
2
1
245BA028 KN