Stihl TS 420 Manual page 60

1
Spark
yes
present?
no
Air gap:
– Check ignition module / flywheel,
– adjust if necessary, b 8.1.1.
Check flywheel:
– Have pole shoes turned blue?
– Replace flywheel if necessary,
b 8.5.
Check short circuit wire:
– Wire damaged?
– Plug connections firmly seated?
– Check continuity, replace switch if
necessary, b 8.6.2.
Check ignition lead:
– Severe chafing?
– Spark plug boot: holes / cracks?
– Resistance of spark plug boot to ground:
required: 1.5...12 kΩ
– Check resistance of ignition lead:
value required < 10 Ω
– Replace spark plug boot and/or ignition
lead if necessary, b 8.4.
2
3
TS 410, TS 420 59