Yamaha - Water Pump Housing - Cooling System Component - F9.9 T9.9 9.9/15 - 682-44300-01-00

Overview

When you’re dealing with cooling issues on smaller Yamaha outboards, the water pump housing is one of the first things I check. It’s what holds everything together around the impeller and keeps water moving the way it should. I’ve seen worn housings cause weak flow even with a new impeller installed. When this part is in good condition, the cooling system stays consistent and the engine runs without overheating.

Key Features

• Water Pump Support – Houses the impeller and supports proper water circulation through the system.
• Genuine Yamaha Fitment – Designed to match factory water pump components and mounting points.
• Consistent Cooling Flow – Helps maintain steady water pressure for reliable engine cooling.
• Sealing Surface Stability – Provides proper sealing to prevent leaks and efficiency loss.
• Durable Marine Construction – Built to handle constant water exposure and engine vibration.

Engine & Boat Compatibility

F9.9 - Various Years
T9.9 - Up to 2004
9.9/15 - Up to 1995

FAQ

Q: What happens if the water pump housing is worn out?
A: It can reduce water flow and cause overheating even if the impeller is new.

Q: Should I replace this when changing the impeller?
A: It’s a good idea to inspect it and replace if there’s any scoring or wear.

Q: Can this affect water pressure?
A: Yes, a worn housing can lower pressure and reduce cooling efficiency.

Q: Is this part hard to install?
A: It’s typically replaced during standard water pump service and is straightforward.

Q: Does saltwater use affect this part?
A: Over time, corrosion and buildup can impact its condition if not maintained.

• Supersessions
  682-44300-02-00, 682-44300-02-00
• Engine Application
  • F9.9 - Various Years
  • T9.9 - Up to 2004
  • 9.9/15 - Up to 1995