6S5-81167-10-00 Crankshaft Oil Seal for Yamaha 255 FSH Sport H 1800 2024-2026

Crankshaft Oil Seal for Yamaha

This crankshaft oil seal replaces Yamaha OEM part 6S5-81167-10-00, sealing the crankshaft exit point to hold oil in and keep contaminants out of the engine case.

Overview

This crankshaft oil seal is a direct-fit replacement for the Yamaha 1800 engine used in 255 FSH Sport H models from 2024 through 2026. It seals around the crankshaft to prevent oil seepage and block dirt, water, and debris from entering the crankcase. A smart pick for owners and techs servicing a Yamaha 255 FSH Sport H who want a dependable crankshaft oil seal on hand.

Built For Performance

• Cross-references Yamaha part number 6S5-81167-10-00
• Seals the crankshaft to retain oil inside the engine case
• Keeps water, grit, and debris out of the crankcase
• Built from oil-resistant seal material for marine engine duty
• Fits 1800 engine applications in the 255 FSH Sport H platform
• Direct replacement for the factory crankshaft oil seal

Fits These Machines

• for Yamaha 255 FSH Sport H 1800, 2024-2026

On-The-Job Use

• Engine rebuilds and lower-end service on the 1800 powerplant
• Seal replacement during oil leak diagnosis
• Preventive maintenance on high-hour 255 FSH Sport H boats
• Repair work after water intrusion into the crankcase

Specs At A Glance

Good To Know

Q: Does this seal fit other Yamaha 1800 engines? A: It is listed for the 255 FSH Sport H 1800 from 2024 through 2026, and Yamaha often shares seals across 1800 variants, so confirm your model and serial number before ordering.

Q: Should I replace both seals at once? A: If one crankshaft oil seal is leaking, inspecting the other while the engine is apart can save a second teardown later.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.