Need to revive this thread. Still need help diagnosing my rough running 235.
After a few months' hiatus (moved to a new place), I'm back to it. Still the same thing, pretty much only runs with part or full choke and a fast idle. Push in the choke or slow the idle much and it stumbles and dies with a big "poof" back through the carb. Still working with the garden hose cooling system.
Made a valiant attempt in January to get her moving under her own power to get on a trailer. Rebuilt the Rochester B but ran out of time before move day didn't get it reinstalled until this week. It doesn't seem to leak anymore, but runs more or less the same. Did a cold valve adjustment at .002 wider than the spec just to eliminate that variable.
Help me vet the following ideas, and choose which path to go down next. I will try things one at a time:
1) I was going to chase vacuum leaks with carb cleaner or whatever, but hate to run it choked for that long. Thoughts?
2) After I gave up tonight, it occurred to me I've never verified the function of the heat riser valve. Should I be able to move by hand from the counterweight side?
3) Can I advance the timing a few degrees with the ball as reference? It's timed right at the ball right now. I know the vac gauge is better, but can't run it well enough to do that right now.
4) Points were replaced a year ago, but not sure about condenser.
5) This was a "barn find." Its quite possible I have some sort of critter obstruction in the exhaust. But how would I check?
6) The B could very well be junk. I've got a Carter YF waiting in the wings to be rebuilt, but want to eliminate and test a few theories before I go there.
Last edited by JW51; 09/02/2015 4:36 AM.
