Stihl MS 311 User Manual - Page 50
Check the flywheel, Air gap, Check the ignition lead, Check short circuit wire, Powerful, spark? - specs
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1 Powerful yes spark? no Air gap: - Check ignition module/flywheel, - reset if necessary, b 7.3 Check the flywheel: - Have pole shoes turned blue? - Install new flywheel if necessary, b 7.6 Check short circuit wire: - Wire damaged? - Connectors firmly seated? - Check continuity, replace wiring harness if necessary, b 7.7.2 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 ignition module removed) Spec.: < 10 Ω, If necessary, install new spark plug boot and/or ignition lead with module, b 7.3 2 MS 311, MS 391 3 49
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49
MS 311, MS 391
Check the flywheel:
– Have pole shoes turned blue?
– Install new flywheel if necessary,
b
7.6
Air gap:
– Check ignition module/flywheel,
– reset if necessary,
b
7.3
Check the ignition lead:
– Severe chafing?
– Spark plug boot: Holes/cracks?
– Resistance: spark plug boot to ground:
spec. 1.5 – 12 k
Ω
– Check resistance of ignition lead
(spark plug
boot and ignition module removed)
Spec.: < 10
Ω,
If necessary, install new spark plug boot and/or
ignition lead with module,
b
7.3
Check short circuit wire:
– Wire damaged?
– Connectors firmly seated?
– Check continuity, replace wiring harness if
necessary,
b
7.7.2
1
3
yes
no
2
Powerful
spark?