Rochester- Four Jet 4G 4GC 4 Barrel Carburetor Parts

USA Made Carburetor Parts. Rochester (Four Jet) 4G, 4GC 4 barrel carburetors. Carburetor rebuild kits, Ethanol Compatible Accelerator Pumps, Jets, Gaskets, Needle & Seats, Rochester Four Jet Carburetor Tech info and more!

The 4G carburetor is equipped with a manually-operated choke valve. Some 4G carburetors are equipped with a vacuum controlled governor to control engine speed (RPM) on heavy-duty truck applications.

The 4GC carburetor has a fully automatic choke.

Originally Rochester identified the 4-Jet carburetors with a triangular tag mounted on the air horn. Early 4-Jet tags were brass, but was changed to aluminum during 1956/57. If no tag is present the last 4 or 5 digits MAY be stamped on the air horn.