I agree with connery.

If at 3 turns its too rich, and at 2 it doesnt get sufficient fuel, play around with it and find a "middle ground". These needles can be extremely sensitive. On my nitro RC car, 1/4 turn on a needle can make the difference between a one pull start and having to pull for a minute or two at half throttle.

If you can get it to start, then you're on the right track. just have a little fun and "play" with your needle settings until the engine runs well.