What i do when that occurs, is set the needle to about 3 turns, crank the starter with the igniter on, and put my finger over the back of the muffler for a second or so. This primes it, and fills the line until the backpressure in the muffler is enough to pressurise the tank like normal. The airbleed I normally leave in the middle of the hole. You can check with a pin in the hole and make it snug. This is normally about right, and only a turn one way or the other is correct. Airbleed carbs are kind of fickle anyway. Things will improve after a minute of running. Oh, and give it some throttle. The airbleed carbs don't normally start at idle.