Thanks, the information was great, turns out in addition, the wire to the idle control valve was broke, I fixed that and readjusted the tower screw (I'm glad you told me how that screw works) and it fired right up. it took all four 1/8 turns! runs great now! the previous owners mechanic missed the broken wire and tried to make up for it with the mixture screw. probably just to get it sold to me!

I really appreciate the help,

Sean