Carburetor fuel control

A carburetor fuel flow control device, for a carburetor having a mixing passage, a valve cavity, a fuel supply passage opening into the cavity and a fuel outlet from the cavity, the device comprising:

• an annular body of a somewhat flexible material having a sidewall and an axially elongate central passage through the body, the body adjacent each end having a circumferentially continuously exterior surface engaging a complementary portion of the valve cavity, an inlet through the sidewall communicating the supply passage with the central passage, and an outlet downstream of the inlet;
• and
• a needle valve having a shank received in the cavity and a cylindrical metering portion slidably and rotatably received with at least a close fit in the central passage and axially movable to at least partially block the inlet to reduce the effective flow area of the inlet into the body passage.