Water Pump Repair Kit for Yamaha F20A, F25A, F25D & C30 Outboards (Replaces 61N-W0078-11-00)
Water Pump Repair Kit for Yamaha F20A, F25A, F25D & C30 Outboards (Replaces 61N-W0078-11-00) 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 Repair Kit for Yamaha F20A, F25A, F25D & C30 Outboar...
Water Pump Repair Kit for Yamaha F20A, F25A, F25D & C30 Outboards (Replaces 61N-W0078-11-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Repair Kit for Yamaha F20A, F25A, F25D and C30 outboards supplies the components needed to service the water pump and restore the engine cooling system. The listed applications include Yamaha 4-stroke F20A models from 1998–2009, F25A models from 1998–2009, F25D models from 2009 onward, and C30 models from 1993–1997.
The kit is listed as an aftermarket interchange for Yamaha OEM part numbers 61N-W0078-10-00, 61N-W0078-11-00, 61N-W0078-13-00 and 61N-W0078-14-00, as well as the SOXAMarine reference 61NW0078. Confirm the part number and engine model information against your engine before ordering.
- Designed for water pump service on the listed Yamaha outboard applications.
- Includes a neoprene impeller and related water pump components.
- Also includes fuel, oil and thermostat service components as listed in the package contents.
- Aftermarket replacement; not an OEM-manufactured component.
Part Number Matrix
Use this matrix to compare the listed OEM and aftermarket references.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 61N-W0078-10-00 | Superseded reference. |
| Yamaha | 61N-W0078-11-00 | Primary listed replacement reference. |
| Yamaha | 61N-W0078-13-00 | Superseded reference. |
| Yamaha | 61N-W0078-14-00 | Later OEM reference listed for comparison. |
| SOXAMarine | 61NW0078 | Aftermarket cross-reference. |
Engine & Model Compatibility
Confirm the complete engine model, year and applicable part number before installation.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F20A | 20 | 4-Stroke | 1998–2009 | 61N-W0078-11-00 | Listed replacement reference: 61N-W0078-14-00. |
| Yamaha | F25A | 25 | 4-Stroke | 1998–2009 | 61N-W0078-11-00 | Listed replacement reference: 61N-W0078-14-00. |
| Yamaha | F25D | 25 | 4-Stroke | 2009 onward | 61N-W0078-11-00 | Listed replacement reference: 61N-W0078-14-00. |
| Yamaha | C30 | 30 | 4-Stroke | 1993–1997 | 61N-W0078-11-00 | Listed replacement reference: 61N-W0078-14-00. |
Technical Specs
- Product Type
- Water Pump Repair Kit
- Installation
- Replacement water pump service components
- Fuel Type
- Gasoline
- Impeller Material
- Neoprene
- Weight
- 0.73 kg (1.6 lb)
- Fitting Type
- Direct-fit replacement design for the listed applications
- Application
- Yamaha 4-stroke outboard water pump service
What’s in the Box
- 1 x Cartridge Insert (63V-44322-00-00)
- 1 x Water Seal Damper (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)
- 1 x Fuel Filter (61N-24560-10)
- 1 x Oil Filter (5GH-13440-00)
- 1 x Thermostat (66M-12411-01)
Installation Notes
- Disconnect the battery and make sure the engine is cool before beginning service.
- Place the outboard in the tilted position and remove the propeller if required for safe access.
- Locate and remove the fasteners securing the lower unit to the upper engine casing, then carefully separate the assemblies.
- Remove the water pump housing cover to access the impeller, plates and seals.
- Clean the mating surfaces and remove old gasket material, deposits and debris.
- Install the replacement components in the reverse order of disassembly, ensuring that the impeller vanes are oriented correctly.
- Use an appropriate marine lubricant as recommended by the engine manufacturer for the impeller and housing.
- Reassemble the water pump housing and tighten the fasteners to the manufacturer’s specifications.
- Reattach the lower unit, ensuring correct alignment of the driveshaft, shift shaft and water tube.
- Run the engine in water or with an appropriate flushing setup and verify a steady tell-tale stream before normal operation.
Troubleshooting & FAQ
How can I tell if my water pump is failing?
Common signs include overheating at idle or low speeds, a weak or absent tell-tale stream, and an impeller that is dry, cracked, worn or deformed. Inspect the complete water pump assembly if any of these symptoms occur.
Is this kit compatible with my specific F25A model?
The listed application is for Yamaha F25A 4-stroke models from 1998–2009. Compare the complete engine model and year with your service information and verify the listed OEM references before installation.
What is the recommended replacement interval for the impeller?
Inspect the impeller regularly and follow the interval specified in your engine owner’s or service manual. More frequent inspection may be appropriate when operating in saltwater, sand or silt.
Is this an OEM kit?
No. This is an aftermarket replacement kit listed against the OEM references shown on this page. It is not manufactured by Yamaha.
Why does the kit include filters and a thermostat?
The package contents include additional maintenance components in addition to the water pump parts. Check the complete contents list above before beginning service.
Can I install the kit myself?
Water pump service requires lower-unit removal and correct reassembly of the driveshaft, shift shaft and water tube. Use the appropriate service manual and torque specifications; professional installation is recommended if you are not familiar with outboard service.
Shipping speed and cost?
Standard shipping is free, with typical transit of 5–15 days. Expedited options appear at checkout where available.
Warranty and returns?
The product is covered by a 1-year warranty against manufacturing defects under normal use. Returns are accepted within the standard return window when the item is unused and in its original condition. Contact support for current policy and return instructions.
Safety & Important Info
- Verify the complete engine model, year, part number and package contents before ordering.
- Do not operate an outboard without an adequate water supply for cooling.
- This is an aftermarket replacement kit, not an OEM component.
- Follow the engine manufacturer’s service procedures and torque specifications.
- Professional installation is recommended when lower-unit service experience is limited.
About Sea Sierra
- Pro-Grade Standards — We supply marine replacement parts selected for demanding real-world service conditions.
- Fast Global Fulfillment — Free standard delivery to most regions, with typical transit of 5–15 days.
- Manufacturer-Direct Value — Competitive pricing with attention to product materials and quality control.
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.
