Stihl SR 430 - Ignition System Troubleshooting

39SR 430, SR 450
5.7 Ignition System Troubleshooting
Machine does not run
Setting lever:
– in position "F"?
Check the spark plug:
– Smeared with oil, black?
– Sooted?
– Electrode gap correct?
– Contacts shorted?
– Clean or replace the plug
b 5.3
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,
b 5.4
Test ignition system:
with ZAT 3 or ZAT 4
(use ZAT 3 as main spark gap
see TI 32.94),
b 5.3
1