JavaScript seems to be disabled in your browser.

You must have JavaScript enabled in your browser to utilize the functionality of this website. Click here for instructions on enabling javascript in your browser.

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.