Yamaha - Outer Plate Cartridge - Water Pump Housing Component - 6E5-44323-00-00

Overview

When you’re rebuilding a water pump, the outer plate is one of those parts that can quietly make or break the job. I’ve seen pumps with a fresh impeller still underperform because this plate was worn or grooved. It helps seal and guide the water flow inside the housing, so it needs to be flat and clean. Replace it when needed, and you’ll get the cooling performance you’re expecting.

Key Features

• Water Pump Housing Support – Helps maintain proper structure and alignment inside the pump assembly.
• Smooth Sealing Surface – Provides a clean contact surface for efficient water flow and sealing.
• Wear-Resistant Construction – Built to handle friction from impeller operation over time.
• Consistent Cooling Performance – Supports steady and reliable water circulation.
• Exact Yamaha Fitment – Matches factory specifications for proper installation and function.

Engine & Boat Compatibility

Designed for Yamaha outboard engines utilizing water pump systems with cartridge-style assemblies. Commonly used across a range of Yamaha outboards in recreational and commercial marine applications. Suitable for freshwater and saltwater environments where dependable cooling performance is essential.

FAQ

Q: What are signs this outer plate is worn?
A: Grooves, scoring, or reduced water pressure are common indicators.

Q: Should I replace this when installing a new impeller?
A: It’s recommended if there’s any visible wear to ensure proper performance.

Q: Any tips for installing this plate?
A: Make sure surfaces are clean and the plate sits flush during assembly.

Q: How does debris affect this component?
A: Sand and grit can cause scoring, which reduces efficiency over time.

Q: Can a worn plate affect cooling?
A: Yes, it can reduce water flow and lead to overheating issues.