28 - English
The engine is equipped with an electronic ignition system completely without moving parts. Consequently,
a faulty component cannot be repaired, but must be replaced by a new component.
The spark in an electronic ignition system has a very short burn time and can therefore be interpreted as
weak and can be difficult to see while troubleshooting.
Electrical system
Fig 20
Fig 21
Fig 22
7.8 Checking the ignition spark
2
If the electrodes are worn more than 50% the
spark plug should be changed.
Too large a spark gap entails a great deal of stress
on the ignition module and risk for short-circuiting.
3
Check if a spark occurs when attempting to start.
Earth the spark plug by attaching it to the starter
screw with a steel wire as shown in figure 22. Give
a sharp pull on the starter handle.
A spark should be seen between the electrodes.
If no spark is seen test with test spark plug no.
502 71 13-01.
If a spark then occurs, the spark plug is broken.
Try a new spark plug.
1
Remove the spark plug and clean it from soot
deposits with the help of a steel brush.
Check the electrode gap. It should be 0.5 mm. Use
the feeler gauge no. 502 51 91-01.
Adjust the gap as needed to the correct value with
the side electrode.
Repair Instructions
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