That was going to be my next area to look at, i thought it odd how numerious carb float settings, didn't do anything as i can't seem to get a nice smooth idle. However idle improves when i unplug my vacuum line for the choke, I put it back on and i get low idle and its very rough. I'm very frustrated as i'm starting to miss my o'l Mercury outboard. This is the 1st inboard i have owned and i not pleased.