Water Pump Repair Kit – Fits Yamaha F20A F25A F25D Outboards (Replaces 61N-W0078-11-00)

Water Pump Repair Kit – Fits Yamaha F20A, F25A, & F25D Outboards

This water pump repair kit is designed for Yamaha 4-stroke 20–25 HP outboards, including models F20A (1998–2009), F25A (1998–2009), F25D (2009+), and C30 (1993–1997). It serves as a comprehensive service kit to restore the performance of your engine's cooling system.

It is a direct replacement 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 61NW0078 kit.

• Engineered for direct OEM-equivalent fit and performance.
• Features a durable neoprene impeller for reliable water flow.
• Comprehensive kit includes impeller, plates, gaskets, filters, and thermostat for a complete service.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Yamaha owners, here’s a guide to help you identify your engine’s serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 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)

Note: This aftermarket kit includes a fuel filter, oil filter, and thermostat, which may not be included in all OEM Yamaha versions. Please verify contents against your specific needs.

Installation Guide

1. Disconnect the battery and remove the engine cover.
2. Drain the lower unit gear oil.
3. Remove the propeller and unbolt the lower unit (gearcase) from the upper engine housing.
4. Carefully separate the lower unit, taking care not to lose the driveshaft.
5. Unbolt and remove the water pump housing assembly.
6. Note the orientation of the old impeller vanes before removing it.
7. Clean all mating surfaces and install the new impeller, gaskets, plates, and seals from the kit.
8. Lubricate the inside of the housing and the new impeller with a light coat of marine grease.
9. Reassemble the water pump housing and torque bolts to the manufacturer's specification.
10. Reinstall the lower unit, reconnecting the shift linkage and driveshaft.
11. Refill the gearcase with fresh oil and start the engine to test for proper water circulation.

Troubleshooting & FAQ

Q: How do I confirm this kit will fit my specific engine?

A: The best method is to match the OEM part number (e.g., 61N-W0078-11-00) from your engine's service manual or existing part with the numbers in our cross-reference list. You can also use the "Compatible Engine Models" table to verify your model and year range.

Q: What are the signs that my water pump needs to be replaced?

A: Common symptoms of a failing water pump include the engine overheating at idle or low speeds, a weak or inconsistent water stream from the "tell-tale" outlet, or a brittle or cracked impeller found during inspection.

Q: How often should I replace the water pump impeller?

A: For preventative maintenance, it is recommended to replace the impeller every 1-2 years or every 100-200 hours of operation, depending on usage conditions (e.g., saltwater vs. freshwater).

Q: Is this an OEM Yamaha part?

A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?

A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?

A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.