Originally posted by Sal_11
2 and 1/2 turns....is that turning it anti clockwise, 2 and 1/2 clicks?
No. Not clicks. Close the needle valve completely first (clockwise). Be careful and just turn it until it stops with no real pressure (too much pressure on some engines will bend the spray bar). It should be 2 complete turns (360 degrees each) and another 1/2 turn (180 degree). Some engines require as much as 3 turns. It sounds as if the engine is burning the prime and then quitting.