Tractor has been running perfectly. Was doing leaves and cutting grass and suddenly it started to loose power but then came back on then it happened again so I turned it off. Checked everything seemed fine. Oil was low put more in and went to start it it cranked but would not start, after turning off, it backfired. So I put it back in shed for a couple days . Went to start it it started but a lot of blue smoke came out and it sputtered a bit so instead of letting it run or get the sputter out I moved the speed lever to a crawl and shut it off guess I was in fear of a backfire. So Should I try to start it again ? And why did it suddenly lose power? Seat switch or what or low oil. If it was the seat switch it would not start at all right? Coil was replaced 3 years ago. Fuel filter has some gas in it? Is there anybody who makes house calls in Connecticut. May be an easy fix bringing in to these dealers etc is so expensive and just getting it picked up is a fortune. Plumbers can come with a truck why cant lawn repair guys??