Keep turning it out until it will start to idle, the fine tune it from there. I had an Irving that worked great at 3.5 turns out, and another (don't remember what one, but think it may be my Super Tiger GS-40) that required 6 turns out.

If it dies as soon as you close the throttle, you are still too lean. Turn the needle out another turn and try it. If its too lean, make another adjustment 1/2 turn out, and repeat these increments and when you have an idea of how it is idling, then work in 1/8 turn increments until you have the idle set. Some engines just take time to get set right.

Hogflyer