OIL SEAL 10.8x21x7 YAMAHA 93101-10811-00 PAF4-03000027

Function and technical context

This oil seal works in the engine lubrication system, hermetically sealing the output shaft at the passage points between internal and external components. Its mission is to prevent the lubricating oil from escaping to the outside while allowing the shaft to rotate freely without excessive friction. In Yamaha marine engines, seals are critical to maintaining lubrication pressure in the crankcase and preventing salt water or contaminants from entering the internal chambers. A seal failure generates lubricant losses that quickly lead to premature wear of bearings, crankshaft and other friction surfaces.

When to replace this part?

Oil seals show wear when oil drips appear at the base of the motor or around the shaft, especially after prolonged periods of storage or inactivity. It is recommended to inspect the condition of the seal at each seasonal maintenance and replace it if visible leaks are observed or if the engine has accumulated more than 500 hours of operation without inspection. Changing the seal preventively during major maintenance operations avoids costly internal repairs and corrosion due to oxidation of critical components.

Equivalent manufacturer part numbers