RETAINER 26-814669

Function and technical context

The 26-814669 seal is a precision sealing component that protects the crankshaft interface on Mercury, Mariner and MerCruiser marine propulsion engines. This seal prevents lubricating oil from escaping from the crankcase to the outside and, simultaneously, prevents salt water or ambient humidity from entering the inside of the engine. It works in the lubrication system, ensuring tightness in one of the most critical areas of the engine block. A deteriorated or defective seal compromises the engine's protection against marine corrosion and causes loss of oil pressure, which drastically shortens engine life.

When to replace this part?

Typical symptoms of a worn seal include visible oil stains around the crankshaft, the smell of burning oil while running, or the presence of water in the crankcase after prolonged stays in a saline environment. It is recommended to inspect the condition of the seal at each seasonal maintenance or after 200-300 hours of operation, especially on boats operated in salt water where corrosion is accelerated. Preventive replacement during routine maintenance checks prevents unexpected boating breakdowns and costly engine repairs in the future.

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers