SEAL 26-11758M

Function and technical context

The 26-11758M REC93101-30M33 seal is a sealing component that works in the lubrication system of the marine engine, specifically in sealing the crankshaft. Its mission is to prevent the oil from the crankcase from escaping to the outside, maintaining the lubrication pressure within the engine passages and preventing contamination of the system due to the entry of salt water or marine debris. This seal is critical in high-performance marine propulsion engines, where poor sealing causes oil leaks that compromise the lubrication of internal moving parts, accelerating wear of the crankshaft and bearings.

When to replace this part?

The most obvious symptoms of seal failure include oil stains under the engine, the smell of burnt lubricant, and the presence of oily residue in the crankshaft area. In continuous marine operation, these seals require review during each seasonal maintenance and preventive replacement after 5-7 years of service, especially in vessels that operate in salt water where corrosion accelerates deterioration. Replacing the seal preventively during a planned inspection is significantly cheaper than repairing damage resulting from a prolonged leak while underway.

Engine Compatibility Table

Mercury/MerCruiser

Equivalent manufacturer part numbers