You need to turn down your idle and go with the 42 pilot jim suggests. Your idle screw is too far in - too much fuel/air coming from this and not through pilot circuit - which is why your air screw doesn't seem to have any effect.
I have heard of this condition referred to as "pulling over"... Pulling too much fuel from needle/nozzle and air from slide pulled up bypasses pilot. You lose the separation between these two fuel "circuits"...
When I see someone with a 38 pilot and looking for something leaner - this is usually the situation - and is aggravated by the n1ef needle that is used oem....
Also, note that this carb is happy with 2- 2 1/2 turns out versus 1 1/2 turns out - this will also send some "off into the weeds"...
jeff
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