just want to know where to set H needle ie richen to where the revs drop off then lean to where it runs smooth or richen to where it just starts to run rough?
Try turning the needle in until it is lightly seated, then back off 1 turn. This is the factory initial setting. Then with the engine running, throttle wide open, adjust the "H" screw (could be in either direction) until the engine sounds like it has reached maximum RPM's without sputtering or dying.
