I have an X350 with 180 hours. When I start it cold, it runs a few seconds and dies. If I hold the choke, it runs a few seconds longer and dies again. After about the 4th or 5th try, it will sputter a bit and keep running. Any guesses before I send it to the dealer? I bought it last year; and have only put about 40 hours on it. I had it into the dealer last year, and they said it wasn't due for any service.