Stihl TS 420 Manual page 61

2
3
Switch shaft
Check correct operation:
– Short circuit wire chafed?
– Contact functions correctly (audible click)
in switch?
– Contact spring on switch deformed?
– Replace switch if necessary,
b 8.6.2.
Spark
yes
present?
no
Replace ignition module
b 8.1.1.
Engine
yes
no
runs
Engine runs smoothly, – Look for fault in fuel or
troubleshooting procedure carburetor system
completed – Check power unit for leaks
– Check position of flywheel
on crankshaft,
b 7.2, b 8.5.
60 TS 410, TS 420