Yamaha - Water Pump Housing Assembly - Cooling System Component - 63B-Y429H-K1-00

Overview

The water pump housing assembly is a key part of your outboard’s cooling system, enclosing and supporting the impeller while directing water flow through the engine. If the housing becomes worn, cracked, or scored, it can reduce water pressure and lead to overheating. This Yamaha water pump housing assembly is designed to restore proper cooling performance and ensure consistent water circulation, helping protect your engine during operation.

Key Features

• Complete Housing Assembly – Supports and encloses the impeller for proper operation.
• Maintains Cooling Efficiency – Helps ensure steady water flow through the engine.
• OEM Yamaha Fitment – Built to factory specifications for accurate installation and sealing.
• Durable Marine Construction – Designed to withstand heat, pressure, and constant water exposure.

Engine & Boat Compatibility

• Compatible with select Yamaha outboards that utilize this water pump housing assembly (confirm fitment by model and year)

FAQ

Q: What does the water pump housing assembly do?
A: It houses the impeller and directs water through the cooling system.

Q: What happens if the housing is worn?
A: It can reduce water pressure and lead to overheating.

Q: Should I replace this during water pump service?
A: Yes, especially if there are signs of wear or internal scoring.

Q: Can a damaged housing affect impeller life?
A: Yes, it can reduce efficiency and shorten the lifespan of the impeller.

• Supersessions
  63D-W4434-01-00, 63D-W4434-00-00