Patent ID: 7484717

Claim:
A carburetor having an accelerator pump assembly, comprising: a carburetor body having an induction passage; a fuel bowl mounted on a bottom of said carburetor body; an accelerator pump cap mounted exteriorly on an underside of said fuel bowl with fasteners and being removable therefrom without requiring disassembly of said carburetor body and fuel bowl, said cap having a recess defined by a base, a sidewall and an open upper end of said cap; a diaphragm mounted on said upper end of said cap and being deflectable downward within said recess; and a fuel chamber located within said cap underneath said diaphragm and defined by said base, sidewall and underside of said diaphragm, said fuel chamber communicating only to a pair of pathways that each extend within the sidewall of said cap to openings on an upper surface of said cap, said pathways including a first fuel supply conduit providing the only path for fuel from said fuel bowl into said fuel chamber and a second fuel supply conduit providing the only path for fuel from said fuel chamber to said induction passage; said cap having at least one fixed, stationary port formed in said sidewall adjacent said upper end of said cap to ensure that any vapor, including fuel vapor, air and water vapor, within said chamber is flushed through said at least one port when said diaphragm is deflected downward into said cap.