i have little or no response with the air screw adjustment, would this be because of worn reeds? i set the air screw at 2 turns out, then when it is warmed up i try to adjust it but i dont get any noticable engine rpm changes just by listening. if i turn it all the way down it cuts it off so i know its doing somthing. i have heard people say to turn it out two turns, then in the hayes book it says one and a half turns out so i dont know.