Stihl FS 240, Service Manual

Page: 66 / 134

65 FS 240 C, FS 260 C, FS 360 C, FS 410 C, FS 460 C-M
7.5 Troubleshooting, M-Tronic
7.5.1 Engine does not start
Can engine
be started?
no
– Move choke lever to
position
}
Troubleshooting completed
– Check ignition (spark
plug, spark plug boot,
ignition spark), b 6
Ignition spark
present?
– Mechanically check start
detection system; is the
switchgear (microswitch)
actuated by the cam of the
choke lever?
– Clicking noise, b 11.4.5
– Examine switch gear,
clean or replace if
necessary,
b 7.4
– Check start detection and
wiring harness electrically,
b 7.3.5, b 7.3.6
yes
Mechanically
OK?
Are target values
attained?,
b 7.3
– Look for a fault in the fuel
path, check engine for
leaks, b 11
– Replace switchgear,
b 7.4
no
yes
no
no
Engine does not start
Is it possible to start
the engine?
yes
no
– Check solenoid valve,
b 7.3.4
Are target values
attained? b 7.3.4
– Replace switchgear and/
or carburetor, b 11.3
yes
yes
no
– Test ignition system
according to flow chart
"Ignition system
troubleshooting", b 7.5
yes