Have a 1987 honda foreman 350 4x4. was plowing snow and shifted it from 1st to 2nd gear and it just stoped running. cannont get it restarted. When i removed the plug to check the oil is was excessivly full and it smelled like there was gas mixed in with the oil. Any ideas on what is the problem or what kind of repairs would be neccessary to fix this problem?