Yamaha - Housing, Water Pump - Cooling System Component - 679-44341-00-00

Overview

The water pump housing is one of those parts that has to be right or the whole cooling system suffers. It holds the impeller and directs water through the system, and if it’s worn or scored, you won’t get proper flow even with a new impeller. I’ve seen engines run hot just because the housing wasn’t sealing or guiding water correctly. When it’s in good shape, water pressure stays strong and cooling stays consistent.

Key Features

• Impeller Housing Support – Holds the impeller in place and directs water flow through the system.
• Genuine Yamaha Fitment – Designed to match factory pump assembly specifications precisely.
• Supports Cooling Efficiency – Helps maintain proper water pressure and flow.
• Smooth Internal Surface – Reduces friction and supports consistent water movement.
• Durable Marine Construction – Built to handle water exposure, heat, and wear.

Engine & Boat Compatibility

Compatible with select Yamaha outboards using this water pump housing. Verify fitment based on your specific engine model.

FAQ

Q: What are signs of a worn water pump housing?
A: Weak water pressure, overheating, or poor cooling performance even with a new impeller.

Q: Should this be replaced with the impeller?
A: It should at least be inspected, and replaced if there’s scoring or wear.

Q: Can this affect engine temperature?
A: Yes, poor water flow from a worn housing can lead to overheating.

Q: Is installation difficult?
A: It’s straightforward during water pump service but requires proper alignment.

Q: Does saltwater use affect this part?
A: Yes, corrosion and buildup can impact performance over time.

• Supersessions
  679-44341-00-94