Thanks guys! Points looks good. Have fuel flow thru carb...I removed plug at bottom and fuel ran out, although I'm not sure what volume of flow I'm looking for. Gonna try the cleaner sprayed thru the main needle hole this afternoon. Hopefully one of these fix it. I do feel like it's worse as the tractor warms up. Could that be the coil??? That might make sense in that you mentioned thermal issues with it....