Yamaha - Impeller - Water Pump Component - 6H4-JD000-08-22

Overview

If there’s one part I never ignore during service, it’s the impeller. It’s the heart of your cooling system, and once it starts to wear, everything else is at risk. I’ve seen engines overheat just from a worn set of blades that couldn’t push enough water. Swap it out in time, and you keep your motor running cool and reliable every trip out.

Key Features

• Efficient Water Circulation – Moves cooling water through the engine to maintain safe operating temperatures.
• Flexible Blade Design – Blades flex and recover to maintain consistent water flow under load.
• Heat-Resistant Rubber – Built to handle constant rotation, friction, and temperature changes.
• Factory-Spec Fitment – Matches Yamaha pump housings for proper sealing and performance.
• Critical Cooling Support – Helps prevent overheating and protects internal engine components.

Engine & Boat Compatibility

Designed for Yamaha outboard engines with compatible water pump 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: How often should I replace the impeller?
A: Typically every 1–2 seasons or sooner if you run in harsh conditions.

Q: What are signs of a failing impeller?
A: Weak water flow, overheating, or no telltale stream.

Q: Can I run the engine with a worn impeller?
A: It’s risky—reduced cooling can quickly lead to engine damage.

Q: Is installation difficult?
A: It requires removing the lower unit, but it’s manageable with basic tools.

Q: Does running dry damage the impeller?
A: Yes, even brief dry runs can damage the blades.