26
English / USA
FS 500, FS 550
: Attach machine to the harness. Let 
it go and check to see how it is 
balanced – change the attachment 
point of the spring hook as 
necessary:
Mowing tools (mowing heads, 
grass cutting blades, brush knives) 
should just touch the ground (top 
illustration).
Circular saw blades should 
"hover" about 8 in (20 cm) above 
the ground (bottom illustration).
: Observe safety precautions – see 
chapter "Safety Precautions and 
working techniques" in this manual.
: Hold down the throttle trigger 
interlock (1) and squeeze the 
throttle trigger (2).
: While holding both levers in this 
position, move slide control (3) to 
START and hold it there.
: Now release the throttle trigger, 
slide control and trigger interlock in 
that order. This is the starting 
throttle position.
: Set the choke knob (4):
For cold start, turn counter-
clockwise to g.
 
For warm start, turn clockwise 
away from g (also use this setting 
if engine has been running but is still 
cold).
: Press the fuel pump bulb (5) at least 
five times – even if the bulb is filled 
with fuel.
: Press the decompression valve 
button (6). Press this button before 
each starting attempt.
Balancing the Machine
256BA016 KN
256BA017 KN
Starting / Stopping the 
Engine
3
START
1
2
STOP
256BA018 KN
5
4
398BA016 KN
6
398BA017 KN