I have had this engine for about a year. On its maden flight it experienced a crash from blowing off the wings of the aircraft. So I sent the engine in to YS parts and service to be repaired and they send it back in about 4 week and they said it was back to working condition. I have been running the engine until to day when I started up the aircraft and when i hit 100% power the engine came to a slow stop and hasn't started since. If anybody has any thoughts please let me know.