Hello, I am having some troubles with my YS 45. The plunger,diaphram,and gaskets have been replaced by me. It seems to behave fine but has a tendency to "flame out" at throttle up after an idle making it unreliable. Works fine one time and when you think all is well, it just stops on throttle up. Check valve and tank hold pressure all day long. Regulator is maybe 1/4 turn lean, and needle valve is 2.25 turns out. Any thoughts on what to check or recheck?

Ken