Overtime, carburetors and choke valves can become clogged with gum, varnish and dirt, affecting performance. Gumout® Carb/Choke & Parts Cleaner quickly removes these deposits from the inside and outside of the carburetor to improve engine performance and fuel economy. It also effectively cleans all nonpainted metal parts and surfaces.
Keep away from battery terminals and electrical connections. Spray with can in upright position. Insert plastic tube firmly into valve button.
With engine off and cool:
Carburetor: Remove the air cleaner and clean the outside of the carburetor and all of the linkage. Avoid spraying electrical connections. Manifold heat control: Spray on exposed ends of cool heat riser shaft. Allow to penetrate and clean. Move counterweight up and down until free.
With engine running:
Carburetor: Spray to both ends of the choke valve shaft while working choke by hand. Spray down and around the carburetor throat to remove deposits from the throttle plate area. Do not spray down carburetor throat with engine off. Do not spray below throttle plate. Choke: If choke sticks, remove choke cover and spray. PCV Valve: Disconnect the crankcase side of the valve and spray into the open end of the valve while working the plunger back and forth.
Not recommended for fuel-injected vehicles. Will not harm catalytic converters or oxygen sensors. Contains no methanol or methylene chloride. If sprayed on painted surface, wipe off at once.