If you have only 1 carburetor, retired wrench is absolutely correct!

If you trying to synchonize two or more carbs on a single engine; try this link:

http://www.thecarburetorshop.com/Dual1barrelcarbs.htm

OR

give me a call at 573-392-7378 (9-4 Mon-Wed central time).

Jon.

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop