chris we where heading to gt hole this morning every thing was great having a good morning we got 7 mile short of gt hole and we pulle dthe stick back to take a break for a min. then we went to get started agian and nothing full throttle it wouldnt turn but about a 1000 rpm,6mph scared the crap out of us so we turn and started to limp back in after about 6 miles it back fire pretty hard in my oppion it sounded lick it blew the cover off of it then it clean up and run fine all the way back in untill we hit shem creek and it started agian. this is the 197 pioneer that you put the prop shaft in because it was bent if you have any idea please help