Yamaha - Water Pump Repair Kit - Cooling System Service Kit - 6A1-W0078-02-00

Overview

If there’s one thing that’ll ruin a day on the water fast, it’s an overheating engine. The water pump is what keeps everything cool, and once it starts wearing out, you’ll see weak flow or rising temps pretty quickly. This is the kit you use when you want to service it properly and not worry about it again for a while. It’s one of those maintenance jobs that pays off every time you turn the key.

Key Features

• Complete Pump Service Kit – Includes key components needed to restore water pump performance.
• Strong Cooling Flow Support – Helps maintain consistent water circulation through the engine.
• OEM Component Quality – Built to Yamaha specifications for reliable fit and durability.
• Preventative Maintenance Solution – Ideal for routine service to avoid overheating issues.

Engine & Boat Compatibility

Designed for Yamaha outboard engines using this style of water pump system. Commonly used across a range of Yamaha applications where consistent cooling performance is critical for engine protection.

FAQ

Q: How often should I service the water pump?
A: Usually every season or around every 100 hours, depending on how the engine is used.

Q: What are signs the pump needs rebuilding?
A: Weak tell-tale stream, overheating warnings, or inconsistent water flow are common signs.

Q: Can I replace just the impeller instead of the full kit?
A: You can, but replacing the full kit ensures everything wears evenly and lasts longer.

Q: Does running in sand or debris affect pump life?
A: Yes, it can wear components down faster and reduce performance.

Q: Is this a difficult install?
A: It’s manageable if you’re comfortable removing the lower unit and following proper steps.

• Supersessions
  6GD-W0078-00-00, 6GD-W0078-00-00