I have been using the cold start. It's on front carb. I need that on and tons cranking just to get it to try and fire. Long enough it will finally run. I can get it settled in a bit at idle and work jets a bit. Can not drive. Just shuts off. Then hard start again.

Will double check those floats. Can't recall if I had those spring seats. I searched online for B18 and HIF6 issues. Read few threads I found. Seems people had issues getting right needles to get working setup. Some couldn't get this to idle. There was a recommendation on a needle that was working best. Have to see if I wrote that done. The needle was a move to richer.