Water Pump Impeller Kit – Fits Yamaha 25-30 HP (Replaces 61N-W0078-10-00, 61N-W0078-11-00)
Water Pump Impeller Kit – Fits Yamaha 25-30 HP (Replaces 61N-W0078-10-00, 61N-W0078-11-00) is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller Kit – Fits Yamaha 25-30 HP (Replaces 61N-W0078-...
Water Pump Impeller Kit – Fits Yamaha 25-30 HP (Replaces 61N-W0078-10-00, 61N-W0078-11-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller Kit – Fits Yamaha 25-30 HP (Replaces 61N-W0078-10-00, 61N-W0078-11-00) is designed for a precise fit on a range of Yamaha outboard motors. It is compatible with 2-stroke 25B, 25X, 30H, and 30G models from 2000–2018, as well as 4-stroke F25, F25A, and F25B models manufactured between 1998 and 2019. This comprehensive kit includes all necessary components for a full water pump service, ensuring reliable engine cooling performance.
This kit directly replaces Yamaha OEM parts 61N-W0078-10-00, 61N-W0078-11-00, 61N-W0078-13-00, 61N-W0078-14-00, 69P-W0078-00, 69P-W0078-01, 69P-W0078-02, and Sierra 18-3432.
- Engineered for standard lower unit service procedures.
- Constructed with durable materials including a neoprene impeller, PA66 nylon housing, and a 316 stainless steel cup and wear plate.
- Manufactured in an ISO9002 certified facility for consistent quality.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 61N-W0078-10-00 |
| Yamaha | 61N-W0078-11-00 |
| Yamaha | 61N-W0078-13-00 |
| Yamaha | 61N-W0078-14-00 |
| Yamaha | 69P-W0078-00 |
| Yamaha | 69P-W0078-01 |
| Yamaha | 69P-W0078-02 |
| Sierra | 18-3432 |
| AM | AM61N-W0078-11 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Yamaha 2-Stroke Models
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | 25B (25BMHL) | 25 | 2-Stroke | 2001–2018 | 61N-W0078-10-00 |
| Yamaha | 25B (25BMHS) | 25 | 2-Stroke | 2001–2007 | 61N-W0078-10-00 |
| Yamaha | 25X (25XMHS) | 25 | 2-Stroke | 2001–2018 | 61N-W0078-10-00 |
| Yamaha | 30H (30HMHL) | 30 | 2-Stroke | 2002–2018 | 61N-W0078-10-00 |
| Yamaha | 30H (30HMHS) | 30 | 2-Stroke | 2001–2018 | 61N-W0078-10-00 |
| Yamaha | 30H (30HWHL) | 30 | 2-Stroke | 2016–2018 | 61N-W0078-10-00 |
| Yamaha | 30H (30HWL) | 30 | 2-Stroke | 2002–2018 | 61N-W0078-10-00 |
| Yamaha | 30G (30GMH) | 30 | 2-Stroke | 2000–2001 | 61N-W0078-10-00 |
| Yamaha | C30 (C30ELRR) | 30 | 2-Stroke | 1993 | 61N-W0078-10-00 |
| Yamaha | C30 (C30ELRS) | 30 | 2-Stroke | 1994 | 61N-W0078-10-00 |
| Yamaha | C30 (C30MLHS) | 30 | 2-Stroke | 1994 | 61N-W0078-10-00 |
| Yamaha | C30 (C30ELRT) | 30 | 2-Stroke | 1995 | 61N-W0078-10-00 |
| Yamaha | C30 | 30 | 2-Stroke | 1996–1997 | 61N-W0078-10-00 |
Yamaha 4-Stroke Models
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F25 | 25 | 4-Stroke | 1998–2005 | 61N-W0078-11-00 | |
| Yamaha | F25A | 25 | 4-Stroke | 2009–2019 | 61N-W0078-11-00 | |
| Yamaha | F25B | 25 | 4-Stroke | 2012–2018 | 61N-W0078-11-00 | |
| Yamaha | F25D (F25DEHTL) | 25 | 4-Stroke | 2009–2017 | 61N-W0078-11-00 | |
| Yamaha | F25D (F25DETL) | 25 | 4-Stroke | 2009–2017 | 61N-W0078-11-00 | |
| Yamaha | F25D (F25DMHL) | 25 | 4-Stroke | 2009–2017 | 61N-W0078-11-00 | Does not apply to F25C models |
Technical Specs
- Product Type
- Water Pump Impeller Repair Kit
- Installation
- Standard Lower Unit Service
- Housing Material
- Nylon PA66 Plastic (Water Pump Housing), Stainless Steel 316 (Cup and Wear Plate)
- Impeller Material
- Neoprene
- Other Technical Attributes
- ISO9002 certified manufacturing
What’s in the Box
- 1 x Cartridge Insert (63V-44322-00-00)
- 1 x Water Seal Damper 3 (6L2-44367-00-00)
- 1 x Impeller (63V-44352-01-00)
- 1 x Woodruff Key (664-44338-00-00)
- 1 x O-Ring (93210-49046-00)
- 1 x Cartridge Outer Plate (68T-44323-00-00)
- 2 x Dowel Pins (93604-10M03-00)
- 4 x Bolts (97095-08045-00)
- 2 x Plates (63V-44328-01-00)
Installation Notes
- Disconnect the spark plug leads and battery cables for safety.
- Shift the outboard into the neutral gear position.
- Remove the mounting bolts that secure the lower unit (gearcase) to the upper leg.
- Carefully lower and separate the gearcase from the drive shaft housing.
- Locate and unbolt the water pump housing cover to access the impeller.
- Remove the old impeller, key, gaskets, and wear plates, noting their orientation.
- Clean all surfaces and inspect the housing for cracks or warping.
- Install the new water seal, plates, woodruff key, and impeller. Turn the driveshaft clockwise to set the vanes correctly.
- Install the new O-ring, reassemble the housing, and tighten bolts to the specified torque.
- Apply marine grease to the driveshaft splines and reinstall the lower unit, ensuring the water tube and shift shaft are aligned correctly.
Troubleshooting & FAQ
How do I know if this kit fits my Yamaha F25C model?
This kit does not fit the F25C model. It is designed for Yamaha F25, F25A, and F25B 4-stroke models within the specified year ranges. Always verify your full model number before ordering.
What are the signs of a failing water pump impeller?
Common signs include the engine overheating at idle or low speeds, a weak or inconsistent stream of water from the tell-tale outlet, and a dry, cracked, or brittle appearance of the old impeller upon inspection.
How often should I replace my outboard's impeller?
For preventative maintenance, it is recommended to replace the water pump impeller every 1 to 2 years, or every 100 to 200 hours of operation, depending on usage conditions (e.g., saltwater vs. freshwater).
Is the pump housing included in this kit?
No, this is a repair kit. It includes the internal components needed for a rebuild, such as the impeller, cartridge insert, plates, and gaskets, but not the main plastic water pump housing itself.
Is the woodruff key necessary for installation?
Yes, the woodruff key is essential. It locks the impeller to the driveshaft, ensuring it spins correctly. This kit includes the required woodruff key.
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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