Yamaha - Cartridge Outer Plate - Water Pump Component - 688-44323-40-00

Overview

When you’re rebuilding a Yamaha water pump, this outer plate is one of those parts that keeps everything sealed and working together. It sits right in the cartridge assembly and helps control how water moves through the pump. If it’s warped or worn, you can lose efficiency even with a new impeller installed. Swapping in a fresh plate keeps the system tight and your cooling performance where it should be.

Key Features

• Water Pump Sealing Surface – Helps maintain proper sealing within the cartridge assembly.
• Genuine Yamaha Fitment – Designed to match factory specifications for correct placement and alignment.
• Supports Efficient Water Flow – Works with internal components to maintain consistent cooling circulation.
• Durable Marine Construction – Built to handle constant water exposure and internal pressure.
• Direct Replacement Component – Ideal for water pump rebuilds and maintenance service.

Engine & Boat Compatibility

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

FAQ

Q: What happens if this plate is worn or damaged?
A: You may see reduced cooling efficiency or leaks within the pump assembly.

Q: Should this be replaced during a water pump rebuild?
A: If there’s any wear or warping, it’s best to replace it while you’re in there.

Q: Can this affect water pressure?
A: Yes, improper sealing can reduce overall cooling system performance.

Q: Is installation complicated?
A: Not at all—it installs as part of the standard cartridge assembly.

Q: Does debris cause damage to this part?
A: Yes, sand and debris can wear down the surface over time.