Water Pump Impeller Kit – Fits Yamaha F225, F250, F300 4.2L Outboards (Replaces 6CE-W0078-01-00)
Water Pump Impeller Kit – Fits Yamaha F225, F250, F300 4.2L Outboards (Replaces 6CE-W0078-01-00) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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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 Impeller Kit – Fits Yamaha F225, F250, F300 4.2L Outboar...
Water Pump Impeller Kit – Fits Yamaha F225, F250, F300 4.2L Outboards (Replaces 6CE-W0078-01-00) is backordered and will ship as soon as it is back in stock.
Product Details
This complete Water Pump Impeller Kit provides everything needed to repair and maintain the lower unit water pump on Yamaha F225, F250, and F300 4.2L V6 four-stroke outboards from 2009 to current models.
It is a direct replacement for Yamaha part numbers 6CE-W0078-00-00, 6CE-W0078-01-00, 6CE-W0078-02-00, and interchanges with Sierra 18-3470 and 18-3471.
- Installs as a direct replacement for the factory original unit.
- Designed for complete service of the lower unit water pump assembly.
- Includes all necessary seals, o-rings, and hardware for a full rebuild.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By | Notes |
|---|---|---|---|
| Yamaha | 6CE-W0078-00-00 | 6CE-W0078-01-00 | OEM Part |
| Yamaha | 6CE-W0078-01-00 | 6CE-W0078-02-00 | OEM Part (This Kit's Reference) |
| Yamaha | 6CE-W0078-02-00 | Current OEM Part | |
| Sierra | 18-3470 | Aftermarket Interchange | |
| Sierra | 18-3471 | Aftermarket Interchange |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha owners: Please verify your outboard's model and production year against this list. This kit fits specific 4.2L V6 models, and it's critical to confirm a match.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F225F | 225 | 4-Stroke | 2011–Current | 6CE-W0078-01-00 | |
| Yamaha | F225B | 225 | 4-Stroke | 2009–Current | 6CE-W0078-01-00 | |
| Yamaha | F225NCA | 225 | 4-Stroke | 2014–2016 | 6CE-W0078-01-00 | |
| Yamaha | F225XB | 225 | 4-Stroke | 2016 | 6CE-W0078-01-00 | |
| Yamaha | F225XCA | 225 | 4-Stroke | 2014–2016 | 6CE-W0078-01-00 | |
| Yamaha | F250D | 250 | 4-Stroke | 2011–Current | 6CE-W0078-01-00 | |
| Yamaha | F250NCA | 250 | 4-Stroke | 2014–2016 | 6CE-W0078-01-00 | |
| Yamaha | F250UCA | 250 | 4-Stroke | 2014–2016 | 6CE-W0078-01-00 | |
| Yamaha | F250XB | 250 | 4-Stroke | 2016 | 6CE-W0078-01-00 | |
| Yamaha | F250XCA | 250 | 4-Stroke | 2014–2016 | 6CE-W0078-01-00 | |
| Yamaha | F300B | 300 | 4-Stroke | 2011–Current | 6CE-W0078-01-00 | |
| Yamaha | F300BETU | 300 | 4-Stroke | 2016 | 6CE-W0078-01-00 | |
| Yamaha | F300BETX | 300 | 4-Stroke | 2016 | 6CE-W0078-01-00 | |
| Yamaha | F300NCA | 300 | 4-Stroke | 2014–2016 | 6CE-W0078-01-00 | |
| Yamaha | F300UCA | 300 | 4-Stroke | 2014–2016 | 6CE-W0078-01-00 | |
| Yamaha | F300XCA | 300 | 4-Stroke | 2014–2016 | 6CE-W0078-01-00 | |
| Yamaha | F300C | 300 | 4-Stroke | 2018–Current | 6CE-W0078-01-00 | |
| Yamaha | FL300BETU | 300 | 4-Stroke | 2016 | 6CE-W0078-01-00 | |
| Yamaha | FL300BETX | 300 | 4-Stroke | 2016 | 6CE-W0078-01-00 | |
| Yamaha | LF225XB | 225 | 4-Stroke | 2016 | 6CE-W0078-01-00 | |
| Yamaha | LF225XCA | 225 | 4-Stroke | 2014–2016 | 6CE-W0078-01-00 | |
| Yamaha | LF250UCA | 250 | 4-Stroke | 2014–2016 | 6CE-W0078-01-00 | |
| Yamaha | LF250XB | 250 | 4-Stroke | 2016 | 6CE-W0078-01-00 | |
| Yamaha | LF250XCA | 250 | 4-Stroke | 2014–2016 | 6CE-W0078-01-00 | |
| Yamaha | LF300UCA | 300 | 4-Stroke | 2014–2016 | 6CE-W0078-01-00 | |
| Yamaha | LF300XCA | 300 | 4-Stroke | 2014–2016 | 6CE-W0078-01-00 | |
| Yamaha | VF250XA | 250 | 4-Stroke | 2015–2016 | 6CE-W0078-01-00 |
Technical Specs
- Product Type
- Water Pump Repair/Impeller Kit
- Installation
- Direct OEM Replacement
- Application
- For lower unit water pump assembly
What’s in the Box
- 1 x Water Pump Impeller (6CE-44352-00-00)
- 1 x Key (90280-04M05-00)
- 1 x O-Ring (93210-94003-00)
- 4 x Bolt (97095-08045-00)
- 2 x Seal, Oil (93104-22M07-00)
- 1 x Cartridge Insert (6AW-44322-00-00)
Installation Notes
- Disconnect the battery and shift the outboard into neutral.
- Place a drain pan under the lower unit and remove the gearcase oil drain screw to empty the lubricant.
- Remove the bolts securing the lower unit (gearcase) to the midsection. Carefully lower and separate the unit.
- Locate the water pump housing on top of the gearcase. Unbolt and lift the housing to expose the impeller.
- Thoroughly clean and inspect the housing, wear plate, and base for scoring, warping, or corrosion. Replace if damage is found.
- Remove the old impeller, woodruff key, gaskets, and seals. Note their orientation.
- Install the new seals, o-rings, and gaskets. Lightly grease where appropriate.
- Slide the new woodruff key into the driveshaft slot and install the new impeller, turning the shaft clockwise to bed the vanes.
- Reinstall the water pump housing and torque its bolts to the manufacturer's specification.
- Reinstall the lower unit, ensuring the water tube, shift shaft, and driveshaft align correctly.
- Refill the gearcase with fresh marine gear lubricant and reinstall the drain screw with a new gasket.
- Reconnect the battery and test the engine in water, confirming a strong stream from the tell-tale outlet.
Troubleshooting & FAQ
How do I know if my water pump impeller is failing?
A weak or nonexistent water stream from the "tell-tale" outlet is the most common indicator. Other signs include engine overheating alarms, steam from the exhaust, or a visibly melted, cracked, or brittle impeller during a physical inspection.
What is the recommended replacement interval for this kit?
For preventative maintenance and to ensure engine reliability, most manufacturers recommend replacing the water pump impeller and related seals every 1 to 2 years or every 100 to 200 hours of operation, whichever occurs first. This can vary based on operating conditions (e.g., saltwater vs. freshwater).
Will this kit fit an F300A model?
No, this kit is specifically designed for the F300B and F300C models, among others listed in the compatibility chart. The F300A uses a different water pump assembly. Always confirm your exact model and year before ordering, and cross-reference the OEM part number 6CE-W0078-01-00.
What's the difference between this kit and older versions like 6CE-W0078-00-00?
The part number 6CE-W0078-01-00 (and subsequent -02-00) is a supersession from Yamaha, indicating an update or revision to the original kit. Our kit is built to the latest specification, ensuring compatibility with all models covered by these part numbers.
Is this a genuine Yamaha OEM part?
This listing is for a high-quality aftermarket replacement, not an OEM component. It is engineered to meet or exceed OEM-level specifications using comparable materials and is manufactured in an ISO 9002 certified facility with rigorous batch inspections for consistency.
How long does shipping take and what does it cost?
We ship worldwide quickly, with typical transit times of 5–15 days for most regions. Standard shipping is free. Expedited shipping options, if available for your location, will be presented at checkout.
What is the warranty and return policy?
This kit is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter an issue, please contact our support team with your order details. Unused items in their original condition can be returned within our standard return window. Please see our full 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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