Ignition Timing; Removing And Installing (Fs 120 - Stihl FS 120 Service Manual

5.3.1

Ignition Timing

Ignition timing is not adjustable.
Since there is no mechanical wear
in these systems, ignition timing
cannot get out of adjustment. How-
ever, an internal fault in the circuit
can alter the switching point in
such a way that a spark test will
still show the system to be in order
although timing is outside the
permissible tolerance. This will
impair engine starting and running
behavior.

5.3.2 Removing and Installing (FS 120...350, FR 350)
 Remove the shroud - see 4.1.
 Pull the boot off the spark plug.
 Remove the fan housing - see
6.2.
 Remove clutch housing -
see 9.1.
•
Remove ignition lead from the
retainers.
3
•
Pull short circuit wire connector
(1) off tag on ignition module.
•
Take out the screws.
 Remove the ignition module.
 Remove the spark plug boot -
see 5.1.
Note: The ignition lead is molded
to the ignition module.
Important: Before installing a new
ignition module, make sure area
for vibration damping pad is free
from grease, dirt and moisture.
 Peel the backing off the new
vibration damping pad.
1
2
•
Place the pad on the ignition
module and apply firm and
uniform pressure.
)6       )5