Stihl 4180 Series Manual page 58

2
3
Check operation of slide control
or separate stop switch
Short circuit wire chafed?
Contact gap (contact springs)
If necessary, install new ignition lead
and/or contact springs, microswitch
Re-connect short circuit wire
Ignition
yes
spark?
no
Install new
ignition module
Engine
yes no
runs
Check # / STOP-O function
Look for fault in fuel system
on slide control or separate stop or carburetor,
switch check engine for leaks,
check position of flywheel on
crankshaft
Series 4180 Powerhead 57