Water Pump Impeller Kit – Fits Yamaha 40/50 HP 2-Stroke & F40/F50/F60 4-Stroke (Replaces Yamaha 63D-W0078-01-00, Sierra 18-3415, GLM 12276) 2-2.3HP including Alpha One Gen I

including Alpha One Gen I (1983–1990)

or the engine overheating

Start the engine and check for leaks

Secure the housing with the new bolts and O-rings provided

Verifying the OEM part number (6E5-45371-01-00) is the most reliable method

Water Pump Impeller Kit – Fits Yamaha 40/50 HP 2-Stroke & F40/F50/F60 4-Stroke (Replaces Yamaha 63D-W0078-01-00, Sierra 18-3415, GLM 12276) 2-2.3HP including Alpha One Gen IProduct Details This Water Pump Impeller Kit Fits Yamaha 40 50 HP 2 Stroke (1994 2005) & F40 F50 F60 4 Stroke (1996+) provides all necessary components to restore your engine's cooling system. It is engineered for a precise fit on Yamaha 2 stroke 40 50 HP (19942005) outboards, including C40, P40, C50, and P50 models, as well as 4 stroke F40 (1999), F50 (1997+), and F60 (2002+) models. It serves as a direct replacement for Yamaha OEM part 63D W0078 01