Quote Originally Posted by ojh View Post
I am having a problem with the carbs getting stupid with flooding at high vacuum, when i close down the choke the vacuum gets high enough in the carbs so (i think) fuel gets pulled from the main wells. As long as the engine runs and you open choke as normal there isn't a 'problem', if you shut the engine off after brief idle fuel will dribble out the throttle shafts. Its an interesting problem and may be an inherent design issue with the 'tube' type carbs.
Check the float level, sounds like the float is too high (to much fuel in the bowl).

.