Water Pump Impeller Kit – Fits Yamaha 8/9.9HP 4-Stroke Outboard (Replaces 69G-W0078-02-00)

Water Pump Impeller Kit – Fits Yamaha 8/9.9HP 4-Stroke Outboard (Replaces 69G-W0078-02-00)Water Pump Impeller Kit Fits Yamaha 8 9. 9HP 4 Stroke Outboard (Replaces 69G W0078 02 00) This water pump repair kit is designed for Yamaha 4 stroke outboard engines, specifically 8 HP and 9. 9 HP high thrust models (T8, T9. 9) from 2007 and newer. It is also compatible with select F25 (1998 2005, 2009 2010) and C30 (1993 1997) models, ensuring your engines cooling system functions correctly. This kit serves as a direct replacement for Yamaha OEM part

Water Pump Impeller Kit – Fits Yamaha 8/9.9HP 4-Stroke Outboard (Replaces 69G-W0078-02-00)

This water pump repair kit is designed for Yamaha 4-stroke outboard engines, specifically 8 HP and 9.9 HP high-thrust models (T8, T9.9) from 2007 and newer. It is also compatible with select F25 (1998-2005, 2009-2010) and C30 (1993-1997) models, ensuring your engine’s cooling system functions correctly.

This kit serves as a direct replacement for Yamaha OEM part numbers 69G-W0078-00-00, 69G-W0078-01-00, and 69G-W0078-02-00. It also cross-references with Sierra 18-3450 and Mallory 9-48613.

• Complete kit includes impeller, cartridge insert, outer plate, seals, and bolts for a full service.
• Engineered to maintain proper cooling system function and prevent overheating.
• Installs in the lower unit with a direct drive connection.

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 Cartridge Insert (63V-44322-00-00)
• 1 x Impeller (63V-44352-01-00)
• 1 x Woodruff Key (664-44338-00-00)
• 1 x Outer Plate, Cartridge (68T-44323-00-00)
• 1 x Damper, Water Seal (68T-44366-00-00)
• 1 x O-Ring (93210-44704-00)
• 4 x Bolt, Hexagon (97080-08045-00 / 97095-08045-00)

Installation Guide

Disclaimer: This is a general guide. Always consult your service manual for detailed instructions specific to your engine model.

1. Disconnect the battery and shift the outboard into neutral.
2. Remove the lower unit mounting bolts and carefully separate the lower unit from the upper casing.
3. Locate the water pump housing on top of the lower unit and remove its mounting bolts.
4. Slide the housing up and off the driveshaft to expose the impeller. Note the rotational direction of the old impeller's vanes.
5. Remove the old impeller, key, gaskets, and wear plate. Clean all mating surfaces thoroughly.
6. Install the new cartridge, plates, and woodruff key.
7. Slide the new impeller onto the driveshaft while turning the shaft clockwise to seat the vanes correctly inside the housing.
8. Apply a light marine-grade grease or soap solution to the new housing and install it over the impeller.
9. Secure the housing with the new bolts, tightening them to the torque specified in your service manual.
10. Reassemble the lower unit to the engine, ensuring all connections (like the shift shaft and water tube) are properly aligned.
11. Reconnect the battery and test the engine on a water supply to confirm proper water flow from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my Yamaha T9.9?

A: This kit fits Yamaha T9.9 high-thrust models manufactured from April 2007 and newer. The surest way to confirm is to verify that your engine's required OEM part number is 69G-W0078-02-00 or its predecessors (69G-W0078-01-00, 69G-W0078-00-00). You can also use our Yamaha Serial Number Guide to identify your engine.

Q: What are the signs my water pump impeller needs replacing?

A: Common signs of a failing impeller include a weak or no water stream from the "tell-tale" pisser outlet, engine overheating alarms, or finding that the old impeller's vanes are cracked, brittle, or permanently curved during an inspection.

Q: How often should I replace my impeller?

A: For preventative maintenance, we recommend replacing the impeller every 1-2 years or 100-200 hours of use. This interval should be shorter if you frequently operate in saltwater or sandy/silty conditions.

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.