Water Pump Repair Kit – Fits Yamaha 4-6 HP (Replaces 6EE-W0078-01, 6BX-WG078-00)
Water Pump Repair Kit – Fits Yamaha 4-6 HP (Replaces 6EE-W0078-01, 6BX-WG078-00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Water Pump Repair Kit – Fits Yamaha 4-6 HP (Replaces 6EE-W0078-01, ...
Water Pump Repair Kit – Fits Yamaha 4-6 HP (Replaces 6EE-W0078-01, 6BX-WG078-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Repair Kit – Fits Yamaha 4-6 HP Outboards (Replaces 6EE-W0078-01, 6BX-WG078-00) provides all necessary components to restore your engine's cooling system. It is designed for Yamaha 4-stroke F4, F5, and F6 models from years 2009–2020, ensuring a precise fit and reliable performance.
The kit serves as a direct interchange for Yamaha part numbers 6BX-WG078-00, 6EE-W0078-00, and 6EE-W0078-01, as well as Sierra 18-3473.
- Engineered for direct OEM replacement and fit.
- Includes all essential gaskets, seals, and hardware for a complete service.
- Restores cooling system performance for engine safety and longevity.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6BX-WG078-00 |
| Yamaha | 6EE-W0078-00 |
| Yamaha | 6EE-W0078-01 |
| Sierra | 18-3473 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is verified for compatibility with the following Yamaha outboard models.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F4LMHA | 4 | 4-Stroke | 2009–2020 | 6EE-W0078-01 | |
| Yamaha | F4SMHA | 4 | 4-Stroke | 2009–2020 | 6EE-W0078-01 | |
| Yamaha | F4BMH | 4 | 4-Stroke | 2010+ | 6EE-W0078-01 | International model |
| Yamaha | F5AMH | 5 | 4-Stroke | 2010+ | 6EE-W0078-01 | International model |
| Yamaha | F5LMH | 5 | 4-Stroke | 2010+ | 6EE-W0078-01 | |
| Yamaha | F5SMH | 5 | 4-Stroke | 2010+ | 6EE-W0078-01 | |
| Yamaha | F6LMHA | 6 | 4-Stroke | 2009–2020 | 6EE-W0078-01 | |
| Yamaha | F6SMHA | 6 | 4-Stroke | 2009–2020 | 6EE-W0078-01 | |
| Yamaha | F6CMH | 6 | 4-Stroke | 2010+ | 6EE-W0078-01 | International model |
Technical Specs
- Product Type
- Water Pump Impeller Repair Kit
- Installation
- Direct OEM replacement
- Weight
- 0.47 kg (1.04 lb)
- Other Technical Attributes
- For water cooling system maintenance
What’s in the Box
- 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 Notes
- Disconnect the battery and ensure the engine is off and cool.
- Remove the lower unit (gearcase) from the outboard motor.
- Unbolt and remove the old water pump housing. Note the orientation of existing parts.
- Remove the old impeller, gaskets, and seals from the driveshaft and housing.
- Clean all mounting surfaces thoroughly to remove old gasket material and corrosion.
- Install the new water seal, gasket, and dowel pins.
- Slide the new impeller onto the driveshaft, rotating clockwise to set the vanes correctly.
- Install the new cartridge, plate, and housing, ensuring all components are properly aligned.
- Torque the housing bolts to the manufacturer's specified value.
- Reinstall the lower unit, ensuring the water tube and shift shaft align correctly.
- Reconnect the battery and test the engine in water, verifying a steady stream from the tell-tale outlet.
Troubleshooting & FAQ
How do I know if this kit fits my Yamaha outboard?
This kit is specifically designed for Yamaha 4-stroke F4, F5, and F6 models made between 2009 and 2020. Please verify your exact model number and year against the compatibility chart provided. Cross-referencing your old part number with the ones listed in our Part Number Matrix is also a reliable way to confirm fitment.
What are the signs of a failing water pump impeller?
Common symptoms include a weak or intermittent water stream from the "tell-tale" outlet, engine overheating alarms, and in severe cases, steam from the exhaust. Visible damage to the impeller vanes (cracks, missing pieces, or loss of flexibility) also indicates it's time for a replacement.
How often should the water pump be serviced?
As a general guideline, it is recommended to inspect and/or replace the water pump impeller every 100 operating hours or at least once per year, whichever comes first. This interval can be shorter if you operate frequently in sandy, silty, or saltwater environments.
Does this kit include the pump housing?
Yes, this is a complete repair kit that includes the water pump housing, impeller, gaskets, plates, and all necessary bolts and dowel pins for a full replacement. Please see the "What's in the Box" section for a detailed list of all included components.
Is there a "break-in" period for a new impeller?
There is no formal break-in period. However, after installation, it is crucial to start the engine in water and confirm a strong, steady stream from the tell-tale outlet immediately. Let the engine idle for a few minutes to ensure everything is functioning correctly before operating at high speeds.
Can I replace just the impeller instead of the whole kit?
While possible, it is not recommended. The housing, wear plates, and gaskets wear down over time and can reduce the new impeller's efficiency and lifespan. Using a complete kit ensures all critical components are new and matched for optimal performance and reliability.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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