Carburetor - HOLLEY 5220 2-Bbl: Description

Carburetor is a 2-stage, 2-venturi type. Primary venturi is smaller than secondary. Secondary stage is mechanically operated by linkage to primary and secondary throttle levers. Primary stage includes curb idle, accelerator pump idle transfer, main metering and power enrichment systems. Secondary stage includes main metering and power enrichment systems. A single fuel bowl supplies fuel for both stages. Carburetor is equipped with an electric automatic choke which has a 2-stage bi-metal heating element. Manual transmission carburetors have 1 choke valve. Automatic transmission carburetors have 2 choke valves (secondary smaller than primary).