PLUG 22-83369M

Function and technical context

This plug is a sealing component that is part of the cooling and fuel supply systems on Mercury 4-stroke outboard engines. Its function is to seal the openings of the tanks and pipes, preventing leaks of coolant or fuel, and preventing the entry of salt water, sediments and contaminants into the vital systems of the propeller. A poor seal in this component can compromise the tightness of the cooling circuit, causing loss of performance, engine overheating and potential damage to cylinders and gaskets.

When to replace this part?

It is advisable to check and replace this plug when signs of visible corrosion, cracks in the material, loss of tightness in the connections appear, or after prolonged periods of exposure to saline environments. Although it does not have a fixed maintenance interval like other components, it is recommended to inspect its condition during each seasonal maintenance and replace it preventively every 2-3 years of active use, especially in saltwater boats. Preventive replacement avoids costly repairs resulting from leaks that can affect critical engine systems while underway.

Compatible Mercury Mariner and Yamaha engines

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers