OK i Bought the sled on saturday and drove it on the trailer and then i drove home and started it. Ran fine got off trailer and the3n it died and then it started back up like three times and now i haven't got it to run since. got spark and gas and compression. Whatdo you think is the problem ??? I just emptied the tank and put fresh gas in. I'm sore from pulling it over and over for 2 days now. any help!!