Water Pump Impeller Kit – Fits Yamaha 25-30 HP (Replaces 61N-W0078-11-00, 61N-W0078-10-00)
Water Pump Impeller Kit – Fits Yamaha 25-30 HP (Replaces 61N-W0078-11-00, 61N-W0078-10-00) is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
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.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Water Pump Impeller Kit – Fits Yamaha 25-30 HP (Replaces 61N-W0078-...
Water Pump Impeller Kit – Fits Yamaha 25-30 HP (Replaces 61N-W0078-11-00, 61N-W0078-10-00) 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 provides all necessary components to restore your engine's cooling system. It is engineered for a wide range of Yamaha 2-stroke outboard motors (25B, 25X, 30H, 30G series from 2000–2018) and 4-stroke models (F25, F25A, F25B from 1998–2019). Note: This kit does not fit F25C models.
It serves as a direct replacement for Yamaha OEM parts 61N-W0078-10-00, 61N-W0078-11-00, 61N-W0078-13-00, and 61N-W0078-14-00, as well as Sierra 18-3432.
- Manufactured in an ISO9002 certified facility.
- Includes a durable neoprene impeller and a high-strength PA66 nylon housing.
- Designed for standard lower unit service procedures.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| Yamaha | 61N-W0078-10-00 |
| Yamaha | 61N-W0078-11-00 |
| Yamaha | 61N-W0078-13-00 |
| Yamaha | 61N-W0078-14-00 |
| Sierra | 18-3432 |
| AM | 61N-W0078-11 |
Engine & Model Compatibility
Confirm your engine model and year in the tables below. This kit is confirmed to fit the listed Yamaha outboards.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| 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 |
| 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-W0078-11-00/61N-W0078-13-00 | Later years use updated part number |
| Yamaha | F25B | 25 | 4-Stroke | 2012–2018 | 61N-W0078-11-00/61N-W0078-13-00 | Later years use updated part number |
| 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 |
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
- Warranty
- 1 year (aftermarket), OEM warranty when purchased from Yamaha
- Other Technical Attributes
- ISO9002 certified manufacturing
What’s in the Box
- 1 x Impeller (63V-44352-01-00)
- 1 x Cartridge Insert (63V-44322-00-00)
- 1 x Cartridge Outer Plate (68T-44323-00-00)
- 1 x Water Seal Damper 3 (6L2-44367-00-00/6L2-44367-01-00)
- 1 x Woodruff Key (664-44338-00-00)
- 1 x O-Ring (93210-49046-00)
- 2 x Plates (63V-44328-01-00)
- 2 x Dowel Pins (93604-10M03-00)
- 4 x Bolts (97095-08045-00)
Installation Notes
- Disconnect the negative battery cable.
- Drain the gear case lubricant from the lower unit.
- Remove the mounting bolts securing the lower unit and carefully drop the assembly.
- Unscrew the bolts from the water pump housing and remove the housing.
- Slide the old impeller, key, and wear plates off the driveshaft. Note their orientation.
- Clean the driveshaft and housing surfaces of any salt deposits or gasket residue.
- Install the new components in reverse order, starting with the new woodruff key and impeller.
- Lightly grease the new o-ring and housing interior before reassembly.
- Tighten housing bolts to the manufacturer's specified torque.
- Re-install the lower unit, ensuring the shift shaft and water tube align correctly.
- Refill the gear case with fresh lubricant and test the engine in the water.
Troubleshooting & FAQ
How do I know if this kit fits my Yamaha outboard?
The most reliable method is to match your engine's model and year to our compatibility chart. This kit fits a wide range of 25-30 HP models but specifically excludes the F25C. If you are unsure, visually compare your old parts to our product photos before ordering.
What are the signs of a failed water pump impeller?
Common symptoms include the engine overheating at idle or low speeds, a weak or non-existent stream of water from the "telltale" outlet, and a dry, cracked, or deformed appearance of the old impeller upon inspection.
How often should I replace the water pump impeller?
For preventative maintenance, it is recommended to replace the impeller every 1-2 years or every 100-200 hours of operation, especially if you frequently operate in sandy, silty, or saltwater conditions.
What is the difference between all the listed Yamaha part numbers?
Part numbers like 61N-W0078-10-00, 61N-W0078-11-00, and -14-00 are part of a supersession chain. This means Yamaha updated the part over time. Our aftermarket kit is designed to replace all of these previous versions.
What materials are used in this kit?
The kit features a durable neoprene impeller for flexibility and longevity. The water pump housing is made from high-strength Nylon PA66 plastic, while the critical cup and wear plate components are made from corrosion-resistant Stainless Steel 316.
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
