Thanks for the advice. I checked the spark plug and replaced it and changed the oil and filter. I think there was too much oil in the crank case cuz the smoke is gone now.
The engine on my lawn tractor starts and runs okay. After running for a bit the engine stutters and a huge cloud of smoke blows out the exhaust, then it recovers and I mow for a few minutes and it does it again.
Any ideas on what is going on? Blown head gasket? Piston rings worn? Help please