Yamaha - Water Pump Repair Kit - Cooling System Service - 6H3-W0078-A0-00

Overview

If you’re running an older Yamaha, especially one that’s seen a lot of water time, staying ahead of the cooling system is key. I’ve worked on plenty where the pump was just tired—nothing catastrophic, just worn enough to cause weak flow and rising temps. This kind of full kit takes the guesswork out and lets you rebuild it properly in one go. Once it’s done right, you know you can trust it every time you fire up the motor.

Key Features

• Complete Pump Rebuild Package – Includes all major components needed for a full water pump service.
• Restores Cooling Efficiency – Helps bring water flow back to proper levels to prevent overheating.
• Matched Internal Components – Designed to work together for correct fit, sealing, and performance.
• OEM-Spec Fitment – Built to Yamaha standards for reliable installation and operation.
• Hardware Included – Comes with bolts, seals, and key components to complete the job without extra parts.

Engine & Boat Compatibility

Designed for Yamaha outboards with compatible water pump systems, including select legacy models. Commonly used on small to mid-size engines found on fishing boats, skiffs, and recreational vessels. Always verify compatibility with your specific engine before installation.

FAQ

Q: What are signs I need to rebuild my water pump?
A: Weak telltale stream, rising engine temperature, or overheating alarms are common signs.

Q: Does this kit include everything I need for a full rebuild?
A: Yes, it includes key internal components, seals, and hardware to complete the service.

Q: Can I install this kit myself?
A: If you’re comfortable removing the lower unit and following proper steps, it’s a manageable job.

Q: How often should I service my water pump?
A: Typically every 1–2 seasons, especially with regular use or in saltwater conditions.

Q: What happens if I delay replacing worn pump components?
A: Reduced water flow can lead to overheating, which can cause serious engine damage.

• Supersessions
  6H3-W0078-00-00