RETAINER 26-888483 REC26-888483

Function and technical context

The 26-888483 seal is a precision sealing component installed on the drive shaft of Mercury, Mariner and MerCruiser marine engines. Its function is to hermetically seal the area where the shaft passes through the motor casing, preventing lubricating oil from escaping to the outside and preventing water or contaminants from entering the lubrication system. It works under conditions of continuous rotation and pressure, so its integrity is critical to maintain correct shaft lubrication and prevent internal corrosion. A failure in this seal can cause loss of lubricant, entry of marine humidity and accelerated deterioration of internal components.

When to replace this part?

Shaft seals should be checked when oil leaks around the drive shaft, discoloration of the engine oil, or moisture in the crankcase are observed. Although there is no universal fixed interval, it is recommended to inspect the condition of the seal each sailing season and replace it preventively if wear is detected, especially after prolonged strandings or navigation in murky waters. Changing the seal preventively is much more economical than facing a major engine repair due to internal corrosion or lack of lubrication.

Engine Compatibility Table

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers