1 X 1404 Carburetor. Choke Type: Manual Choke. CFM: 500 CFM. Carburetor Barrels: 4-Barrel. Carburetor Flange Type: 4-Barrel Square Bore. How To Clean An Carburetor. passages or holes and spray them with carburetor cleaner to ensure they are free-flowing and don't have any blockages.