OIL SEAL 26-41365-1

Function and technical context

The 26-41365-1 oil seal is a critical sealing component that ensures the tightness of the lubrication system in Mercury, Mariner and Mercruiser engines. Installed at strategic points in the engine where rotating shafts pass through crankcases and gearboxes, it prevents oil leaks and prevents the entry of salt water, particles and external contaminants. Its correct operation is essential to maintain the integrity of the lubricating film, prevent internal corrosion and guarantee the durability of the marine propellant.

When to replace this part?

Oil seals progressively degrade due to mechanical friction, elastomer aging and exposure to changes in temperature and salinity. Typical symptoms include visible oil drips on the underside of the engine, persistent stains on the engine mount or cover, and abnormal drop in lubricant level between overhauls. It is recommended to inspect the seals at each seasonal inspection and replace them preventively if signs of deterioration are detected or during major maintenance work. A preventive replacement avoids costly problems such as total loss of lubrication, corrosion of internal components and emergency strandings in the navigation area.

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers