Yamaha - Water Tube - Cooling System Water Transfer - 6AW-44361-00-00

Overview

This is one of those parts you don’t see unless you’re deep into the motor, but it’s critical to keeping things cool. The water tube is what carries cooling water from the lower unit up into the powerhead, and if that flow gets interrupted, you’ll know it fast. When it’s straight and sealed properly, everything works like it should. But if it’s bent, blocked, or not seated right, you’re risking overheating without much warning.

Key Features

• Direct Water Delivery Path – Moves cooling water efficiently from the lower unit to the engine.
• Precision Fit Alignment – Designed to seat correctly between components for uninterrupted flow.
• Corrosion-Resistant Build – Holds up against constant exposure to water and marine conditions.
• Cooling System Reliability – Helps maintain steady engine temperature during operation.

Engine & Boat Compatibility

Designed for Yamaha outboard engines using this style of internal water tube for cooling system flow. Commonly used across modern Yamaha applications where consistent water circulation is essential for engine protection.

FAQ

Q: What are signs of a bad or damaged water tube?
A: Overheating, weak water flow, or no tell-tale stream can point to an issue with the tube.

Q: Can a bent tube affect cooling performance?
A: Yes, even a slight bend can restrict water flow and lead to overheating.

Q: Is this something that gets replaced often?
A: Not usually, but it should be checked anytime the lower unit is removed.

Q: Does saltwater cause problems with this part?
A: Over time, corrosion or buildup can affect it if the engine isn’t flushed regularly.

Q: Is installation tricky?
A: It requires proper alignment when reinstalling the lower unit so the tube seats correctly into the water pump and engine.