Yamaha - Water Tube - Cooling System Water Delivery - 6E5-44361-10-00

Overview

Anytime I’ve had a cooling issue after a lower unit service, this is one of the first places I look. If the tube isn’t lined up right or has any damage, you’re not getting proper water flow up to the powerhead. It’s a simple piece, but it plays a big role in keeping the engine temperature in check. When it’s installed correctly, everything cools like it should and you can run with confidence.

Key Features

• Direct Cooling Water Transfer – Moves water from the pump to the engine for proper cooling.
• Supports Stable Engine Temperature – Helps maintain consistent cooling under load.
• Durable Metal Construction – Built to handle heat, vibration, and constant water flow.
• Corrosion-Resistant Design – Performs reliably in both freshwater and saltwater conditions.
• Exact Yamaha Fitment – Matches factory specifications for proper alignment and sealing.

Engine & Boat Compatibility

Designed for Yamaha outboard engines utilizing internal water tube cooling systems. Commonly used across a wide range of Yamaha outboards in recreational and commercial marine applications. Suitable for freshwater and saltwater environments where dependable cooling performance is essential.

FAQ

Q: What happens if the water tube isn’t aligned correctly?
A: It can restrict water flow and lead to overheating.

Q: How do I know if this tube is damaged?
A: Look for overheating issues, weak water output, or visible bends and corrosion.

Q: Any tips for installing this water tube?
A: Make sure it seats properly into both the pump housing and upper grommet before tightening.

Q: Can buildup affect the water tube?
A: Yes, debris or scale can reduce flow and impact cooling efficiency.

Q: Is this something that wears out often?
A: Not frequently, but it should be inspected anytime the lower unit is removed.