Yamaha - Water Tube - Cooling System Water Transfer - 68T-44361-00-00

Overview

This is one of those parts you don’t see unless you’ve got the lower unit off, but it’s critical to keeping the engine cool. The water tube carries everything the pump pushes up into the powerhead, so it needs to stay sealed and unobstructed. If it’s bent, corroded, or not seated right, you’ll lose cooling efficiency fast. It’s a simple piece, but when it’s right, you never have to think about it.

Key Features

• Direct Water Flow Channel – Transfers cooling water from the pump to the engine without restriction.
• Corrosion-Resistant Construction – Built to handle constant exposure to salt and freshwater environments.
• Precision Fit Design – Ensures proper alignment between the lower unit and powerhead.
• Stable Sealing Surface – Helps maintain consistent water pressure throughout the cooling system.

Engine & Boat Compatibility

Yamaha Outboard Models – Varies by application (confirm by part number)

FAQ

Q: What are the signs of a damaged water tube?
A: You might see weak water flow, overheating, or inconsistent telltale stream.

Q: Can this tube get clogged over time?
A: It can, especially if debris or salt buildup gets inside, though it’s less common than pump issues.

Q: What usually causes failure with this part?
A: Misalignment during installation, corrosion, or impact when removing or installing the lower unit.

Q: Do I need to replace this during every water pump service?
A: Not always, but it should be inspected closely anytime the lower unit is off.

Q: Is installation tricky?
A: The main thing is making sure it seats properly into the grommets—if it’s off even a little, you’ll have cooling problems.