Patent ID: 6895914

Claim:
A carburetor, comprising: a carburetor body having a throat; a movable primer element connected to said carburetor, said primer element and said carburetor defining a variable-volume priming chamber therebetween in which a quantity of liquid fuel is disposed, said priming chamber in fluid communication with said throat and further including a vent; and a thermally-responsive element disposed between said priming chamber and said vent, said thermally-responsive element moveable between a first position corresponding to cold temperatures in which said thermally-responsive element substantially blocks said vent, and a second position corresponding to warm temperatures in which said thermally-responsive element does not block said vent; whereby when said thermally-responsive element is in said first position, movement of said primer element forces a first amount of said liquid fuel from said priming chamber into said throat, and when said thermally-responsive element is in said second position, movement of said primer element forces a reduced amount of said liquid fuel from said priming chamber into said throat.