Stihl FS 240 - Inspection and Maintenance by User; Adjusting the Throttle Cable

42 FS 240 C, FS 260 C, FS 360 C, FS 410 C, FS 460 C-M
Testing of the ignition module is not
limited to only a spark test. If no
ignition spark is obtained or other
functions do not work, a diagnosis
must be carried out according to the
troubleshooting chart; replace
control unit or M-Tronic wiring
harness if necessary.
: Remove screws (1)
: Pull the red lead (2) and blue
lead (3) out of the
guides (arrows)
– Remove throttle cable and short
circuit wire from engine, b 6.6.3
– Remove M-Tronic leads from
cable holder and remove cable
holder, b 6.6.3
Further removal of the control unit is
the same as for the ignition module
without M-Tronic, b 6.2.
Installation
Installation and adjustment of the
control unit is the same as for the
ignition module without M-Tronic,
b 6.2.
– Insert cable holder and insert M-
Tronic leads in the cable holder,
b 6.6.3
– Install throttle cable and short
circuit wire on engine, b 6.6.3
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: Insert lead (red) of the ignition
module (1) with the lug (2) in the
mount – crimped side must face
cable holder
: Insert lead (blue) of the ignition
module (1) with the lug (3) in the
mount – crimped side must face
cable holder
: Starting at the lug, press both
leads into the guides (arrows) as
far as they will go
– Reassemble remaining parts in
reverse order
6.3 Testing the ignition
module
To test the ignition module, use
either the ZAT 4 ignition system
tester 5910 850 4503 or the
ZAT 3 ignition system tester
5910 850 4520.
The ignition test refers only to a
spark test, not to the ignition timing.
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Using the ZAT 4 ignition system
tester
5910 850 4503
– Before starting the test, install a
new spark plug in the cylinder
and tighten it down firmly.
: Connect the spark plug boot to
the input terminal (1). Push the
tester's output terminal (3) onto
the spark plug
Danger! High voltage – risk of
electrocution.
– Crank the engine quickly with the
rewind starter and check
sparkover in the window (2) of
the ignition system tester
The engine may start and
accelerate during the test.
If a spark is visible, the ignition
system is in order.
– If no spark is visible in the
window (2), check the ignition
system with the aid of the
troubleshooting chart, b 6.7
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