I have a Kohler Command 15.5 CV15S that quit running. No power to the main harness which means no spark. I jumped a wire from ignition into harness and got spark, motor ran great. After the motor warms up it won't start again. I check for spark and there's not spark again. If I put a new plug in it fires up runs great. But, I try to re-start and again the same thing, no spark even with a good plug. When I put in a fresh plug, again runs great. Although it seems to have an unusually hot spark. The spark is really arcing like I've never seen. When I re-check the old plug later it has good spark again. Could the Ignition Module be bad allowing too much juice to the plug? I'm using the recommended Champion RC12YC plugs.