CRC Clean-R Carb – Carburetor Cleaner 05081 A carb & choke cleaner that is designed to maximize carburetor performance. Quickly dissolves carburetor deposits such as gum, sludge & varnish to improve fuel system performance & enhance fuel economy. Applications: Carburetor, Automatic chokes, carburetor components, crankcase breather element, exhaust gas recycling valve (EGR), general purpose cleaner for non-painted surfaces, heat risers, intake parts, positive crankcase ventilating system including PCV valve.