2000 John Deere GT 225 with a 15 hp Kohler engine. Aftern running for about 20 minutes it will shut off I do not have any spark at the plug.I think the Engine is still getting fuel because when it does eventually start the engine seems to be flooded. I noticed that the battery light did not come on when the mower cut off, after jiggling wires and connectors the battery light did not come on, but after jiggling the ignition key the light came on but the mower still would not start no spark, to me it seems like an electrical part is overheating and breaking down. I have checked for wiring shorted to ground but did not come up with anything. When I bought the mower I disconnected the reverse cut out switch, and bridged the parking brake switch, I have checked both of these and they seem to be fine. If I had to take a SWAG at it I would have to say it was a TDC pickup?? I don't think it is the ignition switch although the batt. Light came on after giggling the switch. Any help would be appreciated. Randy