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

5/20/2018
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.
26
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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 -
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.
see
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.
A
V
6
9
0
A
R
0
5
2
1
A
V
8
9
0
A
R
2
0
5
2
Place the pad on the ignition
•
module and apply firm and
uniform pressure.
FS 120, 200, 300, 350, 400, 450, FR 350, 450
A
V
7
9
0
A
R
0
5
2
A
V
9
9
0
A
R
0
5
2
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