- Compatible with Yamaha Marine outboard engines: 2-stroke and 4-stroke models 40HP, 50HP, 60HP, including F40, F50, T50, F60, C40, P40, C50, P50. - Direct replacement for part numbers: 63D-W0078-01-00, 63DW007801, 63D-W0078-00-00, 63DW007800, Sierra 18-3415, and 18-3434. - Important: Verify your boat motor's part number before purchasing. If unsure, please contact us with your serial number, year, and horsepower. - Package includes essential components for successful installation: - Water Pump Impeller (6H3-44352-00) - Woodruff Key (90280-03024) - Cartridge Insert (63D-44322-00) - Outer Plate (63D-44323-00) - Gasket (63D-44316-00) - Cover, Seal, O-Ring, and Bolt with Washer. - Designed for optimal performance, this water pump kit ensures reliable cooling for your outboard motor, preventing overheating and enhancing engine longevity. - Practical uses include routine maintenance, replacing worn or damaged parts, and preparing your vessel for the boating season. - Constructed with high-quality materials for durability and consistent functionality, making it a dependable choice for boat enthusiasts and professionals alike.