Yamaha - Water Tube - Cooling System Component - 6BB-44361-00-00

Overview

Cooling issues don’t always come from the pump—sometimes it’s the path the water takes getting to the engine. This tube carries water from the lower unit up into the powerhead, and if it’s restricted, bent, or not seated right, the whole system suffers. I’ve seen overheating problems come down to something this simple more than once. Keeping this tube in good shape keeps the engine running cool and steady.

Key Features

• Direct Cooling Water Transfer – Moves water efficiently from the pump to the engine.

• Maintains Engine Temperature – Supports consistent cooling under load and extended use.

• OEM Fit Accuracy – Matches Yamaha factory specs for proper alignment and installation.

• Durable Marine Construction – Built to handle heat, pressure, and harsh water conditions.

Engine & Boat Compatibility

Verify compatibility with your specific Yamaha outboard model and part number before installation.

FAQs

Q1: What are signs this water tube is damaged?
A: Overheating, weak water flow, or visible corrosion or bending.

Q2: Can a clogged tube cause engine damage?
A: Yes, restricted water flow can lead to overheating and serious issues.

Q3: Should this be checked during water pump service?
A: Yes, it’s a good idea to inspect it whenever the lower unit is removed.

Q4: Can debris build up inside this tube?
A: Yes, sand, salt, and debris can restrict flow over time.

Q5: Is installation difficult?
A: It requires proper alignment during reassembly but is manageable with experience.