Gumout 800002230-12PK Carb and Choke Cleaner, 16 oz. (Pack of 12) Quickly removes deposits from the inside and outside of the carburetor to improve engine performance and fuel economy Cleans gum, varnish, and dirt from clogged carburetors and choke valves Cleans carburetors, linkage, choke valves, and unpainted metal parts to improve performance and reduce emissions Helps overcome hard starting, rough idling, stalling, and high exhaust emissions