Ignition System - Husqvarna 543RBX Workshop Manual

7.8.3 To install the centrifugal clutch
1. Put some grease on the clutch screw, but not on the
thread.
2. Install the centrifugal clutch in the opposite
sequence to how it was removed.

7.9 Ignition system

7.9.1 Introduction
The engine has an electronic ignition system fully
without moving parts. A defective component cannot be
repaired, but must be replaced by a new component.
If the engine does not fire, the ignition module can be
damaged. Before you replace the ignition module, do
the tests that follow.
7.9.2 To examine the spark plug
CAUTION: Always use the recommended spark
plug type. Incorrect spark plug type can cause
damage to the product.
• Examine the spark plug if the engine is low on
power, is not easy to start or does not operate
correctly at idle speed.
• To decrease the risk of unwanted material on the
spark plug electrodes, obey these instructions:
a) Make sure that the idle speed is correctly
adjusted.
b) Make sure that the fuel mixture is correct.
c) Make sure that the air filter is clean.
• If the spark plug is dirty, clean it and make sure that
the electrode gap is correct, refer to
on page 6 .
• Replace the spark plug if it is necessary.
40 - Repair instructions
7.9.3 To do a spark test of the ignition module
1. Disconnect the spark plug cable from the spark plug.
2. Disconnect the spark plug from the cylinder.
3. Connect the ignition tester to the spark plug cap and
4. Use the knob to adjust the distance between the 2
5. Pull the starter rope handle with force. If the ignition
Servicing data
ground the clip to the cylinder.
electrodes. Set the distance to 6 mm.
Note: 6 mm is 6 marks on the scale.
module operates correctly, there is a clear blue
spark between the electrodes. If there is no spark,
examine the spark plug cable.
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