Husqvarna 343R, 345RX, 343F, 345FX, 345FXT Electrical system, Checking the ignition spark, 502 71

2 Electrical system

The engine is equipped with an electronic ignition system completely without moving parts. Conse- quently, 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.

Checking the ignition spark

Clean the electrodes and check the electrode gap.

502 51 91-01

If the electrodes are worn more than 50% the spark plug should be changed.

Check if a spark occurs when attempt- ing 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. It should be 0.5 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.

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