Stihl MS 171 Manual page 51

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1
Powerful
spark?
Air gap:
– Check ignition module/flywheel,
– reset if necessary, b 9.1.1
Check flywheel:
– Have pole shoes turned blue?
– Install new flywheel if necessary,
b 9.5
Check ground and short circuit wires:
– Wire damaged?
– Connectors firmly seated?
– Check continuity, replace wiring harness if
necessary, b 9.6.1
Check ignition lead:
– Severe chafing?
– Spark plug boot: Holes/cracks?
– Resistance: spark plug boot to ground:
spec. 1.5 – 12 kΩ
If necessary, install new spark plug boot
and/or ignition lead with ignition module,
b 9.4
2
no
yes
3
MS 171, MS 181, MS 211