Yamaha - Water Pump Repair Kit - Cooling System Service Kit - 6EG-W0078-00-00

Overview

If you’ve been around Yamaha outboards long enough, you know the water pump is something you stay ahead of—not wait on. I always tell people it’s cheap insurance compared to dealing with an overheated engine. This kit gives you what you need to freshen things up and keep water moving the way it should. Swap it out on schedule, and you avoid a lot of problems before they ever start.

Key Features

• Complete Service Kit – Includes essential components needed to restore proper water pump function.
• Reliable Cooling Performance – Helps maintain steady water flow to keep engine temperatures in check.
• Durable Marine-Grade Parts – Built to handle sand, debris, and constant water exposure.
• Improved Pump Efficiency – Restores strong water circulation for consistent cooling.
• Factory-Matched Components – Designed to fit Yamaha systems for proper installation and performance.

Engine & Boat Compatibility

Designed for Yamaha outboard engines requiring a water pump service or rebuild kit. Commonly used across a range of Yamaha outboards in recreational and commercial boats. Suitable for freshwater and saltwater environments where reliable cooling system performance is critical.

FAQ

Q: Is this kit still current or has it been updated?
A: This version has been superseded by a newer part number, which is typically recommended for replacement.

Q: What are signs the water pump needs to be serviced?
A: Weak water stream, overheating, or inconsistent cooling are common warning signs.

Q: How often should I replace the water pump components?
A: Most recommend inspecting or replacing it annually or every 100 hours, depending on use.

Q: Any tips for installing this repair kit?
A: Make sure the impeller is installed in the correct rotation and use proper lubrication during assembly.

Q: How does saltwater affect the water pump?
A: Salt and debris can wear components faster, so regular maintenance and flushing are important.

• Supersessions
  6EG-W0078-01-00, 6EG-W0078-01-00