Gas in oil Briggs
My son has a Troy Bilt garden tractor with a Briggs 31C707 motor. He had a problem starting late last summer with getting fuel in the oil. I looked at this a couple of weeks ago and took the carb apart. Everything looked okay internally.
As far as I can tell the only way you're going to get fuel in the oil is if the float level is too high. That could be caused by a leaky float or a bad seal on the float valve. The float valve seat was clean. He replaced both the float and float valve, but is still getting fuel in the oil.
Any suggestions on where the problem might be?