Yamaha - Outer Plate Cartridge - Water Pump Housing Component - 6H3-44323-00-00

Overview

When you’re servicing a water pump, it’s not just about swapping the impeller and calling it done. I’ve seen pumps lose efficiency because the internal plates were worn or grooved, and that’s where problems start. This outer plate helps keep everything sealed and moving water the way it should. It’s one of those parts you handle while you’re already in there, so you know the job’s done right.

Key Features

• Water Pump Housing Support – Forms part of the pump assembly to guide and direct water flow.
• Smooth Contact Surface – Helps maintain proper impeller operation and efficient water movement.
• OEM-Spec Fitment – Built to Yamaha dimensions for correct placement within the pump housing.
• Wear-Resistant Design – Designed to handle continuous contact and reduce internal scoring.
• Cooling System Efficiency – Supports steady water circulation to help prevent overheating.

Engine & Boat Compatibility

Designed for Yamaha outboards with compatible water pump and cooling system assemblies. Commonly used across small to mid-size engines found on fishing boats, skiffs, and recreational vessels. Always confirm compatibility with your specific engine before installation.

FAQ

Q: What happens if this plate is worn out?
A: It can reduce water pump efficiency, leading to weak cooling flow and possible overheating.

Q: Should I replace this during impeller service?
A: Yes, especially if there are visible grooves or wear—it helps ensure proper pump performance.

Q: Can this part cause overheating?
A: Indirectly, yes—if it’s worn, it can reduce water flow enough to affect engine temperature.

Q: Is installation difficult?
A: Not typically, but it needs to be seated properly within the housing.

Q: Does debris in the water affect this part?
A: Over time, sand and debris can cause wear, so regular inspection is important.