Gumout, 14 OZ, Jet Spray Carburetor & Choke Cleaner, Cleans The Outside Of The Carburetor & He Inside Of The Carburetor Throat, Also Cleans The PVC Valves, Removes Gum, Varnish & Dirt Build Up, Helps Relieve Hard Starting, Rough Idling, Stalling & High Exhaust Emissions, Gasoline Waster & Loss Of Pep.