One problem using a monojet on a 235 is the dis. vac is wrong on a 235 it's port vac and on the 250s it's manafold vac. There are alot of mod.Bs around I have three sitting in the garage now all rebuilt and ready to go and they all work just fine. I have a 2100s carter on my 52-3100 and get easy starts and better MPG so I use that.I would see if there is a fellow Bolter near you that can let you use a "B" for a couple of weeks and see if that clears up this problem.
Pete
