i have a ops 80 rear carb and ext cant get to stay runing have moved tank up and down mo help do i nead a fuel pump or what this motor was for a ducted fan will at work with a prop? and what size? it will run for a min and die i have tryed highend /lowend not much help . this motor is new but set for a long time i put new o ring on carb no help. i am lost!! it also has a tunepipe i use it to put psi in tank some times it will run fuel out the carb win it starts it is wide open or die. hope some one can help! thanks!!