Troubleshooting Chart, Ignition System - Stihl MS 441 Manual

9.8

Troubleshooting chart, ignition system

MS 441, MS 441 C
Engine does not run
Stop switch:
– In position "#"?
Check spark plug:
– Smeared with oil, black?
– Sooted?
– Electrode gap OK?
– Contacts shorted (threads)?
– Clean, adjust or replace
spark plug,
b 9.3
Check spark plug boot:
– Firmly seated on spark plug (leg spring)?
– Leg spring hook in centre of ignition lead?
– Spark plug boot damaged?
– Replace spark plug boot and/or leg spring if
necessary,
b 9.4
Test ignition system:
with ZAT 3 or ZAT 4
(use ZAT 3 as main spark gap,
see TI 32.94),
b 9.3
1
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