48
MS 311, MS 391
7.8
Ignition System Troubleshooting
Machine does not run
Stop switch:
– in position "
F
"?
Check the spark plug:
– Smeared with oil, black?
– Sooted?
– Electrode gap correct?
– Contacts shorted?
– Clean, readjust or replace the plug,
Check the spark plug boot:
– Firmly seated on plug (leg spring)?
– Leg spring hook in center of ignition lead?
– Boot damaged?
– If necessary, install new spark plug boot and/
or leg spring,
Test ignition system:
with ZAT 3 or ZAT 4
(use ZAT 3 as main spark gap
see TI 32.94),
1
Summary of Contents for MS 311
Page 1: ...STIH STIHL MS 311 391 2009 06 ...
Page 92: ...91 MS 311 MS 391 ...
Page 93: ...92 MS 311 MS 391 ...
Page 94: ...englisch english 0455 542 0123 M2 2 K09 FST Printed in Germany ...