Stihl MS 661 Manual page 59

58
1
Ignition spark
spark?
Air gap:
– Check control unit/flywheel,
– reset if necessary, b 7.2
Check the flywheel:
– Have pole shoes turned blue?
– Install new flywheel if necessary,
b 7.7
Check short circuit wire:
– Wire damaged?
– Connectors firmly seated?
– Check continuity, replace wiring harness if
necessary, b 7.8.1
Check the ignition lead:
– Severe chafing?
– Spark plug boot: Holes/cracks?
– Resistance: spark plug boot to ground:
spec. 1.5 – 12 kΩ
– Check resistance of ignition lead (spark plug
boot and control unit removed)
Spec.: spec.< 10 Ω,
If necessary, install new spark plug boot and/or
control unit,
b 7.6
2
no
yes
3
MS 661, MS 661 C-M