I was wondering the same thing.....I'm running the C/W's on my 235.....they are absolutely great and the electric chokes do their job for about 2 minutes and then are out of the picture.
However, I knocked one of the power feed wires off the back carb and the engine ran "rougher than 3 nights in a Georgia jail". Plugged it back in and she's good to go! Hate to hear you're having a problem as I have encouraged several to go that way.
Dave