This product has been superseded by: 6GD-G4322-00-00

Yamaha - Water Pump Cartridge Insert - Cooling System Component - 646-44322-00-00

Overview

When you’re rebuilding a water pump, the cartridge insert is one of those parts that helps everything work together the way it should. It supports the impeller and keeps water moving through the system efficiently. If it’s worn or damaged, you’ll lose water pressure and risk overheating. Replacing it during service helps keep the cooling system strong and reliable.

Key Features

• Impeller Support Component – Provides proper positioning and support for the water pump impeller.

• Restores Cooling Performance – Helps maintain steady water flow through the engine.

• OEM Yamaha Fitment – Built to factory specifications for proper installation and function.

• Durable Internal Design – Withstands wear from constant water flow and impeller rotation.

Engine & Boat Compatibility

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

FAQ

Q: What does the cartridge insert do?
A: It supports the impeller and helps guide water flow through the pump housing.

Q: Should I replace this during a water pump rebuild?
A: Yes, especially if there’s wear or damage to ensure proper performance.

Q: What happens if this part is worn?
A: It can reduce water pressure and lead to cooling issues or overheating.

Q: Does this affect impeller life?
A: Yes, a worn insert can shorten impeller life and reduce pump efficiency.

• Supersessions
  6GD-G4322-00-00, 6GD-G4322-00-00