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How do I verify spark is working?

My JD 240 with Kawasaki fc240v 14 hp wont start. I tried to verify spark by pulling the plug out and attaching it to the wire then engaging the starter. No spark. Is this a valid way to verify whether or not I am getting spark?

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There are spark (iginition) testers available, but the simplest way is to do what you are doing, plus a step. If you aren't grounding out the bottom "L" shaped part of the spark plug to a metal part of the engine, then you won't get any spark. So, here you go...

1. Remove spark plug.
2. Attach spark plug to wire.
3. Ground spark plug to metal (place the "L" on the engine block, etc... make sure no paint is in the way, it needs metal to metal contact.
4. Keep plug grounded and have a buddy crank the starter. That way you can really get a good look at the plug.

Best of luck!


Posted on May 18, 2009

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Well it probably best if you change places with your buddy you can get a big jolt from the spark, the tool cost under 5 dollars and you wont have to share a beer with a buddy .. kinda pays for itself...jim

Posted on Jul 13, 2014


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Posted on Jan 02, 2017

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