Mercury - Valve-guide - 8M0219258 Boat Trailer Roller Shafts & Pal Nuts it sacrifices itself to prevent

it sacrifices itself to prevent corrosion from damaging expensive components

Restores cooling system efficiency – helps maintain proper water circulation through the engine

Works with oil-injected and small sterndrive systems

Cleans intake ports

and dependable—the kind of thing seasoned boaters rely on simply because it works

Mercury - Valve-guide - 8M0219258 Boat Trailer Roller Shafts & Pal Nuts it sacrifices itself to preventValve guide WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings. ca. gov.