Guy's a friend has a Fox 25 with carb, the barrel is stuck in the partially open/closed position. This engine has the bolt on carb, so it must be a later engine, it appears to be run very lightly.
 We currently have it soaking in brake cleaner to free up the carb.

 What size venturi should we install, and where can we get one?

       Thanks a lot...

Bootlegger
If you find it, let me know.  I have this engine in a plane and would like to get rid of the two needle carb.

  Randy,thanks for the heads up at Fox, will do.
 
  Duke this isn't a two needle set up, although I have seen them. Have you tried running it with only one needle?
 You might try that and see if it will run, then try running it on the other needle. One is probably low and the other high speed.
  Of course your mileage may vary...

It runs ok with the high and low speed needles, it's just a pain to adjust the needle on the bottom when the weather or whatever changes.  Other than that it holds the setting pretty well.  I would like to put the bolt on C/L ventri on to make things easier.