Yamaha - Water Tube 1 - Cooling System Water Transfer - 6EG-44361-00-00

Overview

Water tubes are one of those parts you don’t notice until cooling problems show up. I’ve worked on Yamahas where a slightly bent or misaligned tube caused overheating that didn’t make sense at first. This piece carries water from the pump up into the engine, so it has to be straight and sealed every time. When it’s right, the cooling system just works quietly in the background like it should.

Key Features

• Direct Cooling Water Transfer – Moves water efficiently from the lower unit to the powerhead.
• Consistent Temperature Support – Helps maintain proper engine cooling under load.
• Durable Tube Construction – Built to handle constant water flow, vibration, and heat.
• Precision Alignment Fit – Designed to seat correctly between pump and engine connections.
• Exact Yamaha Replacement – Matches factory specifications for reliable installation and performance.

Engine & Boat Compatibility

Designed for Yamaha outboard engines utilizing an internal water tube within the cooling system. Commonly used across mid-range Yamaha outboards in recreational and commercial boats. Suitable for freshwater and saltwater environments where dependable cooling performance is critical.

FAQ

Q: What are signs this water tube is damaged?
A: Overheating, weak water stream, or visible bending or corrosion are common signs.

Q: Does this part need adjustment during installation?
A: No adjustment, but proper alignment is critical when reinstalling the lower unit.

Q: Any tips for installing this water tube?
A: Make sure it lines up cleanly with the water pump outlet and seals to avoid restriction or leaks.

Q: How does saltwater affect this component?
A: Corrosion can build over time, so regular flushing and inspection help extend its life.

Q: Can a misaligned tube cause engine damage?
A: Yes, restricted water flow can lead to overheating and serious engine issues if not corrected.