Water Pump Impeller Repair Kit – Fits Yamaha 9.9/15 HP (1996-2024) (Replaces 63V-W0078-01-00)

Water Pump Impeller Repair Kit – Fits Yamaha 9.9/15 HP (1996-2024) (Replaces 63V-W0078-01-00)Water Pump Impeller Repair Kit Fits Yamaha 9. 9 15 HP (1996 2024) This water pump impeller repair kit is designed for Yamaha 9. 9 HP & 15 HP, 2 Stroke & 4 Stroke, 2 cylinder outboard engines (1996 2024). It provides all necessary components for a complete and reliable water pump service. This kit is a direct replacement for Yamaha part numbers 63V W0078 00 00, 63V W0078 01 00, 63V W0078 02 00, and 63V W0078 03 00, as well as several aftermarket

Water Pump Impeller Repair Kit – Fits Yamaha 9.9/15 HP (1996-2024)

This water pump impeller repair kit is designed for Yamaha 9.9 HP & 15 HP, 2-Stroke & 4-Stroke, 2-cylinder outboard engines (1996-2024). It provides all necessary components for a complete and reliable water pump service.

This kit is a direct replacement for Yamaha part numbers 63V-W0078-00-00, 63V-W0078-01-00, 63V-W0078-02-00, and 63V-W0078-03-00, as well as several aftermarket equivalents.

• Includes a high-performance impeller, housing plate, and all required gaskets.
• Engineered for a direct OEM replacement fit.
• Constructed from materials suitable for salt water use.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Yamaha owners, here’s a guide to help you identify your engine’s serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 x Water Pump Impeller (Replaces 63V-44352-00-00/63V-44352-01-00)
• 1 x Housing Gasket
• 1 x Housing Plate
• 1 x Upper Gasket
• 1 x Lower Gasket

Installation Guide

1. Safety First: Disconnect the engine's battery and shift the outboard into the neutral position.
2. Access the Pump: Remove the bolts securing the lower unit (gearcase) and carefully lower it from the midsection.
3. Disassemble Housing: Locate the water pump assembly on top of the gearcase. Unbolt and remove the pump housing to expose the impeller.
4. Remove Old Components: Take note of the impeller's rotational direction. Remove the old impeller, gaskets, and wear plate.
5. Clean Surfaces: Thoroughly clean all sealant and corrosion from the housing, plate, and gearcase mating surfaces.
6. Install New Gaskets: Place the new lower gasket and housing plate onto the gearcase.
7. Insert New Impeller: Slide the new impeller into the housing. Rotate the driveshaft in its normal direction of operation to help seat the impeller vanes correctly.
8. Reassemble and Secure: Reinstall the pump housing with the new upper gasket and tighten the bolts to the manufacturer's specified torque.
9. Final Steps: Reattach the lower unit to the engine, ensuring all connections are secure. Once assembled, test the engine using a water source ("muffs") to confirm proper water flow from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my specific engine?

A: This kit is confirmed to fit Yamaha 9.9 HP and 15 HP, 2-stroke and 4-stroke, 2-cylinder models manufactured between 1996 and 2024. To be certain, please cross-reference your engine's model and year in the "Compatible Engine Models" table above.

Q: What are the signs that my water pump impeller is failing?

A: Common symptoms of a worn or damaged impeller include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alarms, or steam from the exhaust. We recommend visually inspecting the impeller during annual service.

Q: How often should I replace the water pump impeller?

A: As a preventative maintenance measure, it is best practice to replace your impeller every 1-2 years or every 100-200 hours of operation. Frequent use in saltwater or sandy/silty conditions may require more frequent replacement.

Q: OEM vs. Aftermarket?

A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?

A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?

A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.