Well depending on what you saw that may be the problem.
From idle to 2000 rpm or so, fuel goes from the bowl to underneath the throttle blades.
So if you saw fuel coming out the boosters or any other location above the blade - that's not right.
Just like shown in the illustration here:
http://www.imperialclub.org/Repair/Lit/Master/273/Page05.htmOnly slight difference from theory to implementation is many carbs have a portion of the transfer slot below the blade at running idle position.
Flip back through the pages for the float and bowl stuff.
Basically. the bowl is at close to atmospheric pressure and the under the throttle a vacuum is created. That's how the low speed (aka idle) system works.
