This guy made a lot of things clear(er) for me tonight when I rebuilt a YFA, especially how vacuum on the backside of the accelerator pump controls how high the rod inside the jet is, which determines rich / lean based on engine load.
Ingenious Design those Carter boys came up with!
http://oldihc.org/tag/carter-yf
Ingenious Design those Carter boys came up with!
http://oldihc.org/tag/carter-yf