Husqvarna 243RJ Workshop Manual page 12

2
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 diffi cult to see while troubleshooting.
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Electrical system
Checking the ignition
spark
Clean the electrodes and check the elec-
trode gap.
If the electrodes are worn more than 50%
the spark plug should be changed.
Check if a spark occurs when attempting to
start.
Test with test spark plug no. 502 71 13-01 if
no spark is seen.
502 71 13-01
Checking the ignition
spark
Remove the spark plug and clean it from
soot deposits with the help of a steel brush.
Check the electrode gap. This should be:
243 RJ: Ikeda Digital CDI: 0,9 – 1,0 mm
253 RJ: Oppama Digital CDI: 0.6 – 0.7 mm
Adjust the gap as needed to the correct
value with the side electrode.
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.
Also check that the stop switch is in the
start position.
Earth the spark plug on the cylinder and
pull sharply on the start 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
faulty.
Try a new spark plug.