A rotary throttle valve carburetor includes an air intake passage (51) and a throttle valve bore formed in a carburetor body (14), a cam (22) disposed in the throttle valve bore, and a throttle valve (15) disposed in the throttle valve bore so that one end...

A rotary throttle valve carburetor for a two cycle engine reroutes a portion of intake air and introduces the air around the circumference of a fuel feed tube. A rotary throttle, rotatable and vertically moveable, fits into a cylindrical chamber intersecti...