I have a Lesco 6x6 with a honda GX620 QAF K1 engine. Only getting spark on the front cylinder? I took both coils off and had them tested and both tested good. I have searched where to download a service manual with no luck? Could it be the engine stop diode? Any advise or information on what to do or how to test it would be greatly appreciated?
I would think anything outside the coils you would have no spark on either. Are you checking spark with the plug? maybe it's bad? Just for piece of mind, swap coils and see if the you get the same results.
on another post there was a person with the same problem, turn out to be the spark head plug. seems he had the gvx630, claimed it to be a recall but not in canada
For future reference, ad to hopefully help someone in the future, the CDI ( ignition module) can burn on one side. They can also fail in such a way as to allow the engine to start and idle but not rev or operate.
Deending upon brand type and layout, a bad crank sensor could cause this issue as well. Hope this helps someone.
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