Small Engine Troubleshooting Problems? Ask a Mechanic Now.
I would have thought the G2 would have a two cycle engine that would have oil added to the gas, or oil injection.?? Yours has four cycle? Why was oil over full? Could there be gas in the oil from a leaking carburetor? Does the oil smell of gas? If it does, you have a bad carburetor, and the fuel is leaking into the oil, diluting it, and causing the smoke.
I see question still open, did you see my response?