Yamaha - Water Pump Adapter - Cooling System Component - 6H4-JD009-06-00

Overview

When you’re working on the water pump, the adapter is one of those pieces that has to be right or nothing lines up the way it should. I’ve run into setups where a worn or damaged adapter caused poor sealing or uneven water flow, and it doesn’t take long before cooling performance drops off. This is the kind of part that keeps everything in the pump assembly properly seated and flowing. Get it right, and the whole cooling system works the way it’s supposed to.

Key Features

• Proper Pump Alignment – Ensures correct positioning of water pump components for efficient operation.
• Consistent Water Flow Support – Helps maintain smooth and uninterrupted cooling water movement.
• Durable Construction – Built to withstand heat, pressure, and constant water exposure.
• Factory-Spec Fitment – Designed for precise integration with Yamaha cooling systems.
• Reliable Sealing Surface – Supports tight connections to prevent leaks and pressure loss.

Engine & Boat Compatibility

Designed for Yamaha outboard engines with compatible water pump and cooling system assemblies. Commonly used across small to mid-range outboards on fishing boats, skiffs, and utility vessels. Always confirm part number compatibility before installation.

FAQ

Q: What happens if this adapter is worn or damaged?
A: It can lead to poor sealing, reduced water flow, or cooling inefficiency.

Q: Should I replace this during a water pump rebuild?
A: If there’s any wear or damage, it’s a good idea to replace it while you’re in there.

Q: Can this affect engine temperature?
A: Yes, improper alignment or sealing can reduce cooling performance.

Q: Is installation complicated?
A: It’s straightforward, but correct placement and alignment are important.

Q: Does saltwater use impact this part?
A: Over time it can, especially if corrosion builds up, so regular inspection helps.