When I start the engine, everything starts up fine. After a few seconds the lawnmower dies. There is a little white smoke that comes out of the engine, but does not seem to be an excessive amount. This just started happening today, mowed yesterday with no problem. Have checked out electrical issues can not seem to be able to isolate the problem. Someone told me they thought it might be the solenoid, but that does not seem right to me. Thanks for any ideas...