i have an auto scott. I changed the plugs yesterday and they have carbon built up on them. Yes i did the nutter and the timing is at 8 above. Is it normal for my carb to be running the best with the mixture screws at 3 full turns out.
do a plug test. pull a couple plugs while engine is cold and tell me what color they are.
and then drive it till its warm . then drive to 40 or better push in the clutch kill engine stop as fast as you can safely and pull a cpuple plugs and tell me what they look like.
also did you do the nutter bypass and set the timing correctly ?