I just bought a 1992 Polaris SL650 for $250 that wasn't running. The previous owner claimed that the engine was recently rebuilt. The starter bendix was bad so I replaced it. After I reassembled everything, it fired right up. I went to lake test it and it would bog down when I gave it gas. After about 5 minutes, it died and would not restart. The next day, I hooked up water to it and ran it in the driveway. It started right up and ran fine for 5 minutes and then died. It would not restart. Any advice?