6510C Carburetor

This carburetor is a 2-Bbl., controlled air/fuel ratio unit. The primary bore is smaller than the secondary bore. The secondary throttle is mechanically operated (linkage). A feedback air/fuel metering system works directly in relation with the EFC system. A vacuum signal from the modulator is sent to the feedback diaphragms. One diaphragm controls the air bleed needle in the air horn. The other (main metering diaphragm) controls fuel flow through the main feedback metering orifice. As modulated vacuum increases, the air bleed needle is opened, allowing more air into the idle system. This results in a leaner air/fuel mixture.