KOHLER CV15S irratically stopped running, Get no spark at all now.
Husqvan riding mower has worked fine. For a long time the engine would backfire loudly. Eventually it might backfire and die. Usually it would start, but it got so that often I could crank a long time and eventually it might start up. Sometimes I could mow the yard. As time went by, I might only get part mowed before it would backfire and shut down. Often it wouldn't start up at all no matter how long I cranked it. Occationally it might start and run fine till it decided NOT. It has now gotten to where it won't start no matter. I find no spark even with a known good plug. What could be so erratic. Do coils work sometimes and eventually fail completely? Any oppinions what has brocken down?