Stihl MS 440 Service Manual page 53

1
Powerful
yes
spark?
no
Check air gap
and reset if necessary
Check flywheel:
Have pole shoes turned blue?
Install new flywheel
Disconnect short circuit wire from
ignition module
Check ignition lead:
– Severe chafing?
– Spark plug boot: Holes/cracks?
– Resistance: spark plug boot to ground:
spec. 1.5 – 12kΩ
– Check resistance of ignition lead:
spec. < 10 Ω,
If necessary, install new spark plug boot
and/or ignition lead
2
3
52 MS 440, MS 440 C