RETAINER 26-897153

Function and technical context

The 26-897153 Oil Seal is a precision sealing component that is part of the lubrication system of Mercury, Mariner and MerCruiser engines. Its main function is to prevent oil leaks at critical points of the engine where rotating axes pass through the casing, guaranteeing the tightness of the lubrication circuit. This seal is essential to maintain the correct oil pressure in the system and prevent the entry of water or external contaminants. A defective seal allows the gradual loss of lubricant, which reduces the viscosity of the oil in the crankcase and compromises the lubrication of internal engine components.

When to replace this part?

Symptoms of seal wear include the presence of oil stains under the engine, an abnormal drop in lubricant level between checks, and oil deposits around the area where the seal works. Although seals do not have a fixed predetermined maintenance interval, they should be inspected at each seasonal inspection and replaced immediately if leaks are detected. Performing the preventive change during scheduled maintenance is more economical than facing a breakdown due to lack of lubrication while sailing, which can severely damage the engine.

Engine Compatibility

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers