Water Pump Repair Kit – Fits Yamaha 4HP, 5HP, 6HP 4-Stroke Outboards (Replaces 6E0-W0078-00, 6EE-W0078-01)
Water Pump Repair Kit – Fits Yamaha 4HP, 5HP, 6HP 4-Stroke Outboards (Replaces 6E0-W0078-00, 6EE-W0078-01) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
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Water Pump Repair Kit – Fits Yamaha 4HP, 5HP, 6HP 4-Stroke Outboard...
Water Pump Repair Kit – Fits Yamaha 4HP, 5HP, 6HP 4-Stroke Outboards (Replaces 6E0-W0078-00, 6EE-W0078-01) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Repair Kit is engineered for Yamaha 4HP, 5HP, and 6HP 4-stroke outboard motors, covering models from 1999 through the current year, including F4A/F4B, F5A, and F6C series engines. It provides all the essential components to restore your cooling system's performance and prevent overheating.
This kit is a direct interchange for Yamaha OEM part numbers 6E0-W0078-00, 6E0-W0078-01, 6E0-W0078-02, 6E0-W0078-A2, 6E0-W0078-A200, 6EE-W0078-00, and 6EE-W0078-01.
- Designed for direct OEM replacement installation.
- Built for standard marine operating conditions.
- Includes impeller, housing, gaskets, plates, and hardware.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| Yamaha | 6E0-W0078-00 |
| Yamaha | 6E0-W0078-01 |
| Yamaha | 6E0-W0078-02 |
| Yamaha | 6E0-W0078-A2 |
| Yamaha | 6E0-W0078-A200 |
| Yamaha | 6EE-W0078-00 |
| Yamaha | 6EE-W0078-01 |
Engine & Model Compatibility
Confirm your engine model and year in the table below. It is recommended to verify the correct kit series (6E0 vs. 6EE) by your engine's serial number, especially for models around 2009.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F4A | 4 | 4-Stroke | 1999–2008 | 6E0-W0078-00/01/02 | Early models |
| Yamaha | F4B | 4 | 4-Stroke | 2009–Present | 6EE-W0078-01 | Later models |
| Yamaha | F4LMHA | 4 | 4-Stroke | 2019–2020 | 6EE-W0078-01 | |
| Yamaha | F4SMHA | 4 | 4-Stroke | 2019–2020 | 6EE-W0078-01 | |
| Yamaha | F5A | 5 | 4-Stroke | 1999–Present | 6E0-W0078-00/01/02, 6EE-W0078-01 | |
| Yamaha | F6C | 6 | 4-Stroke | 1999–Present | 6E0-W0078-00/01/02, 6EE-W0078-01 | |
| Yamaha | F6LMHA | 6 | 4-Stroke | 2019–2020 | 6EE-W0078-01 | |
| Yamaha | F6SMHA | 6 | 4-Stroke | 2019–2020 | 6EE-W0078-01 |
Technical Specs
- Product Type
- Water Pump Repair Kit
- Installation
- Direct OEM replacement
- Housing Material
- Composite/Metal (varies by component)
- Operating Temperature
- Marine operating conditions
- Other Technical Attributes
- For use with 4/5/6 HP 4-stroke Yamaha outboard engines
What’s in the Box
Kit for 6E0-W0078 series numbers:
- 1 x Housing, Water Pump (6E0-44311-00)
- 1 x Gasket, Water Pump (6E0-44315-A0)
- 1 x Inner Water Pump (6E0-44322-02)
- 1 x Plate (6E0-44323-00)
- 1 x Damper (6E0-44366-00)
- 1 x Impeller (6E0-44352-00)
- 2 x Dowel Pin (93604-18080, 93604-09066)
- 1 x Plate (6E0-44328-00)
- 4 x Bolts (varies by kit)
Kit for 6EE-W0078 series numbers:
- 1 x Housing, Water Pump (6EE-G4311-00-00)
- 1 x Gasket, Water Pump (6EE-G4315-00-00)
- 1 x Insert, Cartridge (6BX-44322-00-00)
- 1 x Outer Plate, Cartridge (6BX-44323-00-00)
- 1 x Damper, Water Seal 2 (67D-44366-00-00)
- 1 x Impeller (6E0-44352-00-00)
- 2 x Pin, Dowel (93604-18080-00)
- 4 x Bolt (97080-06045-00)
Installation Notes
- Disconnect the battery and remove the engine cover.
- Place a drain pan under the lower unit and remove the gearcase oil drain screw to empty the oil.
- Remove the bolts connecting the lower unit (gearcase) to the upper driveshaft housing. Carefully separate the lower unit.
- Locate the water pump housing on top of the gearcase. Unbolt and remove the housing.
- Take note of the component order. Remove the old impeller, gaskets, wear plates, and seals.
- Clean the housing and mating surfaces thoroughly, ensuring no old gasket material remains.
- Install the new components from the kit in the reverse order of disassembly. Lightly grease the new gaskets and impeller.
- Ensure the impeller fins are oriented correctly (curved against the direction of engine rotation).
- Reinstall the water pump housing, tightening bolts to the manufacturer's specified torque.
- Reattach the lower unit to the upper housing, ensuring the driveshaft and water tube align correctly.
- Refill the gearcase with fresh oil, reconnect the battery, and start the engine in water to test for proper water flow from the tell-tale outlet.
Troubleshooting & FAQ
How do I know if this kit fits my Yamaha outboard?
Check your engine's model, horsepower, and year against the compatibility chart. For models made around 2009, it is best to verify your engine serial number to determine whether you need the earlier 6E0 series kit or the later 6EE series kit.
What are the signs of a failing water pump?
The most common signs are a weak or non-existent water stream from the "tell-tale" outlet and the engine overheating alarm sounding. Reduced engine performance can also be an indicator.
How often should I replace my water pump impeller?
As a general maintenance rule, it is recommended to inspect and/or replace the water pump impeller every 1 to 2 years, or every 100-200 hours of use, whichever comes first. This interval can vary based on operating conditions (e.g., saltwater vs. freshwater, sandy/silty water).
What is the difference between the 6E0 and 6EE kits?
The 6EE-W0078-01 kit is for later model Yamaha engines (typically 2009 and newer) and contains slightly different components, such as a cartridge-style insert and plate, compared to the 6E0-W0078-00 kit used on earlier models. Please check our parts list and your engine requirements carefully.
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.
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