Checking The Ignition Spark - Husqvarna 525BX Workshop Manual

Repair instructions

7.4 Checking the ignition spark

Dismantle the engine cover after the starter is
removed.
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.
If there is still no spark, remove the short-circuit
cable from the engine cord.
Remove the switch and cord after dismantling
left-half of the handle.
If the plug now sparks, the fault is either in the stop
switch or the short-circuit cable.
Change the switch as needed and check to see if
the cable insulation is damaged.
Still no spark?
Check the spark plug connection.
Remove the spark plug cap and make sure the
ignition cable is not damaged. Remove a segment
of cable if required to get sufficient contact at the
connection coil.
TIP!
Spray the the hole in the spark plug cap with
silicone to make it easier to pull off the spark plug
cap.
When a part of the ignition cable has been cut off it helps
to use pliers no. 502 50 06-01 to make a new hole in the
ignition cable to fit the ignition coil.
NOTE!
It is important that the tip of the contact coil
hits the centre of the ignition lead to prevent
sparking.
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- English