Sounds alot like what I'm going through with the Rochester on my 54' 235. Lacks power, and wants to die when throttled...unless you have the choke knob about 3/4 out. Then she runs like a champ, but idles fine no matter what the choke knob is at (once warm). Did a vacuum test, and got 19.5" at idle. Checked for vacuum leaks, and only found a small leak at the notorious throttle/choke shafts.
That's where I'm at. I'm thinking about having the throttle shaft bushings installed this winter, as well as making sure the castings aren't warped. If I find something miraclous, I'll let you know. I believe that Chetman here on the forum is going through the same thing as both of us.
By the way, I live in Roeland Park (grew up in De Soto), always nice to get to know local 'bolters. e-mail me if you need an extra hand, or I can help in any way.
[email protected]Bryan
