Yamaha - Water Pump Housing - Cooling System - F300 F350 (V8) 6AW - 44311-01-00

Overview

The water pump housing is the foundation of the entire cooling pump assembly. The Yamaha 6AW-44311-01-00 Water Pump Housing surrounds the impeller and forms the chamber that allows water to be drawn up from the lower unit and circulated through the engine. Over time, sand, debris, and impeller wear can score or damage the housing surface, reducing pump efficiency. Replacing a worn housing during pump service helps restore proper cooling performance and keeps large Yamaha offshore engines running at safe operating temperatures.

Key Features

• Impeller Chamber Housing – Provides the internal cavity where the impeller spins to move cooling water through the engine.

• Restores Water Pump Efficiency – Replacing worn housings helps maintain proper cooling water flow and pump pressure.

• OEM Yamaha Construction – Manufactured to Yamaha specifications for correct fit and reliable operation.

• Ideal During Pump Rebuilds – Commonly replaced when servicing the full water pump assembly.

Engine & Boat Compatibility

• F300 - All Models
• F350 - All Models

FAQ

Q: What role does the water pump housing play in the cooling system?
A: It forms the chamber where the impeller spins, allowing the pump to draw water from the lower unit and circulate it through the engine.

Q: When should the water pump housing be replaced?
A: If the internal surface becomes worn, grooved, or damaged during water pump inspection.

Q: Can a worn pump housing affect cooling performance?
A: Yes. Scoring inside the housing can reduce impeller efficiency and limit water flow.

Q: Is this part replaced during routine water pump service?
A: It is often inspected during pump service and replaced if wear is visible.

Q: Does running in sandy or shallow water damage the housing faster?
A: Yes. Sand and debris passing through the pump can accelerate wear inside the housing.

• Supersessions
  6AW-44311-00-00
• Engine Application
  • F300 - All Models
  • F350 - All Models