Yamaha - Impeller Housing - Water Pump Component - 6HH-51312-00-00

Overview

When you’re dealing with Yamaha cooling systems, the impeller gets most of the attention, but the housing is just as important. I’ve seen plenty of pumps rebuilt where the old housing was worn or scored, and the new impeller never had a chance to work right. The Yamaha Impeller Housing 6HH-51312-00-00 is what keeps everything sealed and moving water the way it should. If the housing isn’t in good shape, your cooling system won’t perform the way it needs to out on the water.

Key Features

• Supports Efficient Water Flow – Provides the proper chamber for the impeller to move cooling water through the system.

• Yamaha Engineered Fit – Designed to match factory specifications for correct alignment with water pump components.

• Durable Internal Surface – Built to resist wear from constant impeller rotation and water movement.

• Maintains Pump Integrity – Helps ensure consistent cooling performance when paired with a healthy impeller.

• Direct Replacement Component – Installs in place of the original housing during water pump service.

Engine & Boat Compatibility

The Yamaha Impeller Housing 6HH-51312-00-00 is designed for Yamaha outboard engines that use a lower unit water pump system for engine cooling.

It is commonly replaced during water pump service when wear or scoring inside the housing can affect cooling efficiency. Always confirm compatibility using your engine model and parts diagram before installation.

FAQ

Q: How do I know if my impeller housing needs replacement?
A: If you see scoring, grooves, or wear inside the housing, it’s a good sign it should be replaced.

Q: Can I reuse the old housing with a new impeller?
A: You can, but it’s not recommended if there’s visible wear since it reduces pump efficiency.

Q: How often should this part be replaced?
A: It depends on use, but it’s typically inspected during every impeller service and replaced as needed.

Q: Does saltwater use affect the housing?
A: Yes, saltwater can accelerate wear and corrosion over time, especially if maintenance is delayed.

Q: Should I replace other parts during this service?
A: It’s a good idea to inspect or replace the impeller, gaskets, and wear plate at the same time.