Here's how to test the ignition coil:
1. Resistance Test (Primary Winding):
* Locate the coil terminals: The Kawasaki FC540V coil usually has two primary terminals (low voltage) and one secondary terminal (high voltage). The primary terminals are typically larger. Consult your engine's wiring diagram to be certain.
* Set your multimeter: Set your multimeter to measure resistance (usually represented by Ω).
* Measure resistance: Place the multimeter leads across the two primary coil terminals. The Kawasaki FC540V coil's primary resistance should be within a specified range. This range is crucial and you MUST consult your engine's service manual. The manual will provide the correct ohm (Ω) range. A reading outside this range indicates a faulty coil.
2. Resistance Test (Secondary Winding):
* Set your multimeter: Keep your multimeter in resistance mode.
* Measure resistance: Place one multimeter lead on the secondary (high voltage) terminal and the other lead on *one* of the primary terminals. Again, consult your service manual for the specified resistance range. A reading outside this range indicates a faulty coil.
3. Spark Test (Optional, but Recommended):
While the resistance test gives a good indication, a spark test confirms the coil's ability to generate a spark. This is best done with a spark tester, a tool specifically designed for this purpose, but can be improvised with a spark plug and wire attached to a grounded metal object.
* Connect the spark tester or improvised setup: Connect the spark tester or your makeshift spark tester (spark plug wire to the spark plug and the plug's metal threads are grounded).
* Ground the engine: Make sure the engine block is grounded (usually this is already the case).
* Connect to the coil: Connect the high voltage (secondary) terminal of the ignition coil to your spark tester.
* Crank the engine: Have someone crank the engine while you observe the spark tester. A strong, consistent blue spark indicates a good coil. A weak or no spark points to a coil problem.
Important Considerations:
* Service Manual: The most accurate and reliable test data is found in your Kawasaki FC540V engine's service manual. The resistance values are engine-specific.
* Other Components: A weak spark could also indicate problems with the ignition switch, wiring, or the spark plug itself. If the coil tests good, you need to test these other components.
* Safety: High voltage is dangerous. Be careful when working with the ignition system. Disconnect the spark plug and battery before working.
If you're uncomfortable performing these tests, it's best to take your lawn mower to a qualified small engine repair shop for diagnosis and repair. Improper testing can lead to injury or damage to your engine.
