Water Pump Repair Kit – Fits Yamaha 25–30 HP Outboard Motors (Replaces 61N-W0078-11-00, 61N-W0078-14-00)

Water Pump Repair Kit – Fits Yamaha 25–30 HP Outboard Motors

This water pump repair kit is designed for specific Yamaha 2-Stroke 30 HP (1993–1997) and 4-Stroke 25 HP (1998–2018) outboard motors. It provides a complete solution for servicing or rebuilding your lower unit's water pump. Note: This kit is not compatible with Yamaha F25C models.

It serves as a direct replacement for Yamaha OEM part numbers 61N-W0078-10-00, 61N-W0078-11-00, and 61N-W0078-14-00, as well as Sierra part 18-3432.

• Complete Assembly: The kit includes a new impeller, housing cup, wear plate, gaskets, seals, and all necessary hardware for a full replacement.
• Durable Materials: The pump cup and wear plate are constructed from high-grade Stainless Steel 316 for enhanced corrosion resistance and longevity.
• Installation Location: Mounts in the lower unit of the outboard motor.

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 Insert, Cartridge (63V-44322-00-00)
• 1 x Impeller (63V-44352-01-00 / 6H4-44352-00-00)
• 1 x Key, Woodruff (664-44338-00-00)
• 1 x O-Ring (93210-49046-00)
• 1 x Outer Plate, Cartridge (68T-44323-00-00)
• 2 x Pin, Dowel (93604-10M03-00)
• 4 x Bolt (97095-08045-00)
• 2 x Plate (63V-44328-01-00)
• 1 x Water Pump Cup (Stainless Steel 316)
• 1 x Wear Plate (Stainless Steel 316)
• 1 x Water Seal (6L2-44367-01-00)

Installation Guide

1. Shift the outboard into neutral and disconnect the battery.
2. Remove the bolts securing the lower unit (gearcase) and carefully separate it from the upper housing.
3. Locate the water pump assembly on the driveshaft and unbolt the housing cover.
4. Take off the old pump housing, impeller, wear plate, and seals. Pay attention to the original orientation of the impeller vanes.
5. Thoroughly clean all mating surfaces, ensuring all old gasket material and corrosion are removed.
6. Install the new woodruff key on the driveshaft and place the new wear plate and gasket.
7. Slide the new impeller onto the driveshaft. While turning the shaft clockwise, install the new pump cup to correctly orient the impeller vanes.
8. Install the new water seals and outer plate, and secure the housing with the new bolts, tightening them to the manufacturer's specified torque.
9. Reinstall the lower unit, making sure the driveshaft, shift shaft, and water tube are properly aligned.
10. Secure the lower unit mounting bolts and reconnect the battery.
11. With the engine in water or connected to a flush device, start it and confirm a steady stream of water is flowing from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my Yamaha engine?
A: This kit is made for Yamaha 2-Stroke 30 HP (1993–1997) and 4-Stroke 25 HP (1998–2018) models. Please reference the "Compatible Engine Models" table to match your specific model and year. It is not compatible with Yamaha F25C models. You can also cross-reference your existing part number with those in the "Part Number Cross-Reference" table.

Q: What are the signs my water pump is failing?
A: The most common signs are a weak or inconsistent water stream from the engine's tell-tale outlet, engine overheating alarms, or a melted water pump housing. During inspection, a brittle, cracked, or worn-down impeller also indicates a need for replacement.

Q: How often should I replace the water pump impeller?
A: For preventative maintenance, we recommend inspecting the impeller annually and replacing the full kit every 1-2 years or every 100-200 hours of use. This interval may shorten depending on operating conditions (e.g., frequent use in sandy/silty water).

Q: What is the difference between this kit and an OEM one?
A: This is an aftermarket kit engineered to meet or exceed original manufacturer specifications. Critical components like the pump cup and wear plate are made from corrosion-resistant Stainless Steel 316 to ensure longevity. It offers a reliable and cost-effective alternative to OEM parts without sacrificing performance.

Q: OEM vs. Aftermarket?
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.