Patent ID: 7165536

Claim:
An internal combustion engine, comprising: a fuel tank containing liquid fuel; a fuel vapor control device including a housing in fluid communication with an upper portion of said fuel tank, said housing containing fuel vapor absorbent media, whereby fuel vapors from the liquid fuel within said fuel tank are trapped by said absorbent media; and a carburetor, comprising: a carburetor body having an air intake passage including a venturi portion; a fuel chamber containing liquid fuel, said fuel chamber in fluid communication with said fuel tank; a main fuel circuit fluidly communicating said fuel chamber with said venturi portion of said air intake passage; an idle fuel circuit fluidly communicating said fuel chamber with said air intake passage downstream of said venturi portion; and a fuel circuit shutoff valve disposed upstream of said main and idle fuel circuits, including a valve member movable between a first, closed position in which fuel flow from said fuel chamber to said air intake passage through said main and idle circuits is substantially prevented and a second, open position in which fuel flow from said fuel chamber to said air intake passage through said main and idle fuel circuits is allowed.