Husqvarna K970 III Workshop Manual page 27

transformer. The secondary coil increases the voltage to
20 000V. This causes a spark.
C B A
B A
C
6.2.2 Ignition unit
The ignition unit is sealed and cannot be repaired. The
spark plug cable, the connection unit to the spark plug
and the seal on the ignition unit can be replaced.
1. Stop switch
2. OilGuard
6.2.3 Troubleshooting ignition system
Examine the ignition system first if the engine does not
start.
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D
A
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2
6.2.4 To examine the ignition spark
1. Ground the spark plug to the cylinder.
2. Move the stop switch to the operation position.
3. Pull the starter rope handle.
If there is no spark, the problem can be a defective
spark plug, defective ignition cable or a damaged short
circuit cable. Examine the spark plug.
6.2.5 To examine the spark plug
The electrode gap must be .02 in/0.5 mm.
The electrodes must be free of dirt and oil. Clean with a
wire brush.
Note: An electrode with soft edges and damaged
ceramic around it can cause pre-ignition. You must
replace a spark plug with soft edges.
Repair and servicing - 27