Water Pump Impeller Kit for Yamaha F4B/M, F5A/M and F6C/M Four-Stroke Outboards – Replaces 6BX-WG078-00, 6BX-WG0078-00 and 6EE-W0078-00/01
Water Pump Impeller Kit for Yamaha F4B/M, F5A/M and F6C/M Four-Stroke Outboards – Replaces 6BX-WG078-00, 6BX-WG0078-00 and 6EE-W0078-00/01 is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller Kit for Yamaha F4B/M, F5A/M and F6C/M Four-Stro...
Water Pump Impeller Kit for Yamaha F4B/M, F5A/M and F6C/M Four-Stroke Outboards – Replaces 6BX-WG078-00, 6BX-WG0078-00 and 6EE-W0078-00/01 is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller Kit is designed to service the cooling system on selected Yamaha 4-stroke outboard engines. The kit is listed for Yamaha F4B/M, F5A/M, and F6C/M models from 2010 onward, as well as the F4A model from 1998–2009. It includes the impeller and water-pump service components needed to renew the pump assembly and help restore proper cooling-water circulation.
The kit replaces or cross-references Yamaha water-pump service-kit numbers 6BX-WG078-00, 6BX-WG0078-00, 6EE-W0078-00, and 6EE-W0078-01. These numbers are manufacturer reference numbers; confirm the exact model and year of your outboard before ordering.
- Complete aftermarket water-pump service kit for the listed Yamaha applications.
- Includes the impeller, pump housing, gaskets, insert cup, wear plate, water-seal damper, dowel pins, and bolts shown below.
- Suitable for routine water-pump maintenance or replacement of worn, cracked, brittle, or damaged impeller components.
Part Number Matrix
Use these manufacturer reference numbers to compare the kit with the service part listed for your engine.
| Brand | Reference Number | Reference Type |
|---|---|---|
| Yamaha | 6BX-WG078-00 | Water-pump service-kit reference |
| Yamaha | 6BX-WG0078-00 | Water-pump service-kit reference |
| Yamaha | 6EE-W0078-00 | Water-pump service-kit reference |
| Yamaha | 6EE-W0078-01 | Water-pump service-kit reference |
Engine & Model Compatibility
Keep the model family, horsepower, stroke, and year range together when checking fitment. The application information below is limited to the combinations identified for this service-kit reference.
| Brand | Model Family | Rated HP | Stroke | Year Condition | Reference Numbers |
|---|---|---|---|---|---|
| Yamaha | F4B/M | 4 | 4-Stroke | 2010 onward | 6BX-WG078-00; 6BX-WG0078-00; 6EE-W0078-00/01 |
| Yamaha | F5A/M | 5 | 4-Stroke | 2010 onward | 6BX-WG078-00; 6BX-WG0078-00; 6EE-W0078-00/01 |
| Yamaha | F6C/M | 6 | 4-Stroke | 2010 onward | 6BX-WG078-00; 6BX-WG0078-00; 6EE-W0078-00/01 |
| Yamaha | F4A | 4 | 4-Stroke | 1998–2009 | 6BX-WG078-00; 6BX-WG0078-00; 6EE-W0078-00/01 |
Technical Specs
- Product Type
- Water pump impeller service kit
- Application
- Selected Yamaha 4-stroke 4–6 HP outboard engines
- Installation
- Replacement water-pump service components
- Fuel Type
- Gasoline outboard engines
- Aftermarket Status
- Aftermarket replacement; not manufactured by Yamaha
What’s in the Box
- 1 × Impeller, water pump — reference 6E0-44352-00
- 1 × Water-pump housing — reference 6EE-G4311-00
- 1 × Water-pump gasket — reference 6EE-G4315-00
- 1 × Insert cup — reference 6EE-G4322-00
- 1 × Wear plate — reference 6EE-G4323-00
- 1 × Water-seal damper — reference 6EE-G4366-00
- 2 × Dowel pins — reference 93604-18080
- 4 × Bolts — reference 97080-06045
Installation Notes
- Place the outboard securely and lower or remove the gearcase as required to access the water-pump assembly.
- Remove the fasteners securing the water-pump housing and lift the housing from the driveshaft.
- Note the direction of the existing impeller vanes before removing the old impeller, wear plate, and gaskets.
- Clean the housing and mating surfaces, removing old gasket material, corrosion, and debris.
- Install the new gasket, wear plate, and related pump components in the correct order.
- Slide the impeller onto the driveshaft while turning the shaft in the direction specified by the engine service procedure so the vanes seat correctly.
- Reinstall the water-pump housing and tighten the fasteners to the engine manufacturer’s specified torque.
- Reassemble the gearcase, run the engine in water or with the correct flushing equipment, and verify a steady tell-tale stream before normal operation.
Troubleshooting & FAQ
How do I know if this kit fits my Yamaha engine?
Check that your engine is a Yamaha 4-stroke F4B/M, F5A/M, or F6C/M from 2010 onward, or an F4A from 1998–2009. Also compare the water-pump reference on your engine parts information with 6BX-WG078-00, 6BX-WG0078-00, 6EE-W0078-00, or 6EE-W0078-01. Model designation and year must match together.
What are the signs of a failing water-pump impeller?
Common signs include a weak or absent tell-tale stream, overheating, steam, or an overheating warning. A removed impeller may show cracked or brittle rubber, broken vanes, excessive wear, or permanent deformation.
How often should I replace the impeller?
Inspect the impeller during scheduled maintenance and replace it when it is worn or damaged. Frequent operation in saltwater, muddy water, sand, or silt can increase wear and may require more frequent inspection.
What is important when installing the new impeller?
Install the impeller with the vanes oriented for the pump’s rotation direction. Lubricate and assemble the pump only in accordance with the applicable Yamaha service procedure, and verify water flow after reassembly.
Is this an OEM Yamaha part?
No. This listing is for an aftermarket replacement kit. Yamaha and the reference numbers shown are used only to identify the applicable engine service-kit references.
What should I do if my original parts look different?
Do not rely on horsepower alone. Compare the complete engine model, year, existing water-pump arrangement, and reference numbers before ordering. If the housing, impeller, or mounting arrangement differs, confirm the correct kit before installation.
Safety & Important Information
- Disconnect the engine from the starting source and secure the outboard before servicing the gearcase or water pump.
- Use the manufacturer’s service information for disassembly, torque values, sealing procedures, and the correct impeller-vane direction.
- Never operate the outboard without an adequate water supply or the proper flushing equipment.
- Verify the complete model and year conditions before purchase; a similar horsepower rating does not by itself confirm compatibility.
- This is an aftermarket replacement kit and is not an original Yamaha component.
- Professional installation is recommended if you are not familiar with outboard gearcase and water-pump service.
About Sea Sierra
- Marine Replacement Parts — We supply aftermarket components for routine marine maintenance and repair.
- Application-Focused Listings — Product references and fitment conditions are provided to help match replacement parts to the correct engine configuration.
- Practical Maintenance Support — Service components are organized for common cooling-system repair and preventive-maintenance tasks.
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