My 300 has less than 300 hrs on it's overhaul.(pistons,sleeves,rings,bearings) tractor runs limited time on a rotary brush cutter and snowblower in the winter.i have not used it in probably a month and a half. Just pulled the dipstick and oil is over full and smells gassy. I have the main fuel adjustment screw turned out to the maximum power setting (5 turns) according to the IT manual I have. Would this somehow cause excess gas in the oil ? When cutting and blowing snow I run it wide open and the tractor is working pretty hard. I do not shut the gas off at the sediment bowl when not in use. It runs and starts perfect. Should I back off on the fuel adjustment some ? Tractor does not smoke at all when idling or working hard. I changed the oil several times since the rebuild just to be safe and had not really noticed the oil level coming up probably because of the low hours between changes. Thoughts ?