Thanks for the tip, I will give it a try. One thing though, why do you say I am starting at a very lean setting? My manual says to start with the engine 1.5 turns open for the 40 and 46la and 2.5 turns for the 65. My engine is a 40la so thats why I am only opening the screw 1.5 turns.
Also will this solve my problem of surging at high revs?

Thanks,

Troy.