Yamaha - Water Pump Housing - Cooling System Component - T25 F30 F40 - 66T-44311-00-00

Overview

When you’re chasing cooling issues on these smaller four-strokes, the housing is something that often gets overlooked. If it’s worn, warped, or scored, it won’t move water the way it should—even with a new impeller. This Yamaha water pump housing is built to restore proper flow and keep the cooling system doing its job. It’s one of those parts that makes a noticeable difference when you’re doing a full pump service.

Key Features

• Restores Water Flow Efficiency – Provides proper housing surface for consistent pump performance.

• OEM Yamaha Fitment – Designed to match factory specs for correct alignment and sealing.

• Durable Internal Surface – Built to resist wear from impeller rotation and debris.

• Cooling System Reliability – Helps maintain steady engine temperature under load.

Engine & Boat Compatibility

• T25
• F30
• F40 2000-present

FAQ

Q: When should I replace the water pump housing?
A: If you see grooves, scoring, or uneven wear inside the housing, it’s time to replace it.

Q: Can I reuse the old housing with a new impeller?
A: You can, but if it’s worn, it’ll reduce water flow and shorten the life of the new impeller.

Q: What happens if the housing is damaged?
A: It can lead to weak water pressure and possible overheating issues.

Q: Is this part replaced during every water pump service?
A: Not always, but it’s recommended if there’s visible wear or performance issues.

• Engine Application
  • T25
  • F30
  • F40 - 2000 to present