Water Pump Impeller Kit for Yamaha 6EE-W0078-01

Water Pump Repair Kit – Fits Yamaha 4-6 HP Outboards

This water pump repair kit provides all the necessary components to service the water pump on Yamaha 4-stroke 4 HP, 5 HP, and 6 HP outboards from 2009 to 2020. Regular maintenance of the water cooling system is essential to prevent engine overheating and ensure long-term reliability.

This kit is a direct replacement for Yamaha part numbers 6EE-W0078-01, 6EE-W0078-00, and 6BX-WG078-00, as well as Sierra 18-3473.

• Compatible with Yamaha F4, F5, and F6 models (2009-2020).
• Includes key components such as the impeller, housing, gaskets, and seals.
• Engineered for direct OEM replacement fit and function.

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 (6E0-44352-00-00)
• 1 x Water Pump Housing (6EE-G4311-00-00)
• 1 x Insert Cartridge (6BX-44322-00-00)
• 1 x Outer Plate Cartridge (6BX-44323-00-00)
• 1 x Water Pump Gasket (6EE-G4315-00-00)
• 1 x Water Seal Damper (67D-44366-00-00)
• 2 x Pin Dowel (93064-18080-00)
• 4 x Bolt (97080-06045-00)

Installation Guide

1. Disconnect the battery and remove the engine cover.
2. Drain the lower unit gear lube.
3. Remove the bolts securing the lower unit (gearcase) to the upper casing.
4. Carefully separate the lower unit from the driveshaft housing. Be mindful of the shift shaft.
5. Unscrew the bolts holding the water pump housing in place.
6. Remove the old housing, impeller, gaskets, and wear plates. Clean all mating surfaces thoroughly.
7. Install the new gasket, wear plate, and impeller. Ensure the impeller key is correctly seated.
8. Lubricate the inside of the new housing and install it over the impeller, turning the driveshaft clockwise to seat the vanes.
9. Install the new seals and gaskets, and tighten the housing bolts to the manufacturer's specified torque.
10. Reassemble the lower unit to the engine, ensuring the driveshaft, water tube, and shift shaft are correctly aligned.
11. Refill the gear lube and test the engine using a water supply (flushing muffs or in water). Check for a steady water stream from the tell-tale outlet.

Troubleshooting & FAQ

How do I confirm this kit fits my engine?

First, check the "Compatible Engine Models" table to see if your Yamaha model and year range are listed. For further confirmation, use our Yamaha Serial Number Guide to identify your exact model and cross-reference the OEM part number.

What are the signs of a failing water pump?

Common signs of a worn or damaged impeller include the engine overheating at idle or low speeds, a weak or intermittent water stream from the tell-tale outlet, or visible cracks and brittleness on the impeller vanes during a visual inspection.

How often should I replace the water pump impeller?

As a preventative maintenance measure, it's recommended to inspect the impeller annually and replace it every 1-2 years or after every 100-200 hours of use. Service intervals should be shorter for engines operated frequently in saltwater or sandy/silty conditions.

OEM vs. Aftermarket?

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.

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

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.

What is your warranty and return policy?

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.