This is the confusion (I believe) Turning out would bring the needle farther out and allow more AIR to flow. It's an air mixture screw, not a fuel mixture screw. It regulates air, not fuel. Is this correct?
That was always my understanding.It supposedly regulates idle mixture by allowing more air in the mix. Thats why when you need to turn it out too far (past 4 turns or thereabouts) you have to go up a size on the pilots. Because otherwise too much air for the amount of fuel the pilot can deliver=lean. It's also said to affect the entire throttle range to a small degree.
