The OP has posted this exact question, "verbatum", on another site. Not that there is anything wrong with that but has now been given basically the same answer. Adjustments need to be made on these engines about 1/8 turn max per adjustment beginning at about 1 1/2 turns on both needles. High end first for peak then low end for transition and high end again. I feel this engine is just not properly tuned from the getgo and he needs some major help in doing so. That's just my opinion.