Jerry,

The fact that your engine runs as you say makes me think there is something amiss with the needle valve. Have you taken the needle all the way out and checked for a piece of debris that may be keeping the needle from seating properly? I usually start with at least 3 or 4 full turns open and have never seen the need to go to one turn from being fully closed and work right. This might also explain your previous inconsistant runs. Have you a spare NVA from another engine to try? If nothing else try removing the lock down nut completely and see if the needle will then go in a little farther. Please keep in mind that not being able to see the engine and trying to give advice is frustrating too. Buddy, I sure wish I had the answer for you. You may be fighting more than one problem but I'm pretty sure there is something wrong in The NVA area.

Tight lines,

Tom