I have a Craftsman 50" with a Kohler Command GT 22.5 HP v twin engine. It was a gift that had set up for a while. We put a new battery in and after some tinkerin got the mower runnin. I tried to start it a few days later and found i had a dead battery. The battery got recharged and is powering another mower just fine. I was wondering if there was some sort of alternator that kept the battery charged and where it would be located? I have heard of magneto's, but in referrence to engines with pull cords.Would this possibly apply? I appreciate your time and help.