my 250 ozark had set for a while and would not run so i rebuilt the carb except for the diaphrams it started and ran but not good. I then found a problem with the pit cock { fuel was coming through the pri vacume side of the pit cock . So I replaced it with a new one, now it runs great for a while but then starts to idle high as if it is sucking air and then dies ? If you ride it ,it does great for about 3/4 of a mile then it just dies ? but it will start right back up if you turn the pit cock to pri ,but when you turn it back to on it does it again. What could be the problem ?
