Yamaha - O-Ring - Cooling System Seal - 6EE-G4311-00-00

Overview

O-rings might be small, but they can cause big problems if they fail. I’ve seen simple seals like this lead to leaks or cooling issues, especially on smaller motors like the F2.5 where everything is compact. It’s one of those parts you always replace while you’re in there—it’s just not worth reusing. When it’s fresh and seated right, the system stays sealed and trouble-free.

Key Features

• Reliable Seal Performance – Helps prevent leaks within cooling system connections.
• Flexible Rubber Construction – Designed to maintain a tight seal under pressure and temperature changes.
• Compact Precision Fit – Matches Yamaha specifications for proper seating in tight spaces.
• Heat and Water Resistant Material – Built to handle continuous exposure to engine heat and water flow.
• Direct Yamaha Replacement – Ensures proper sealing and dependable operation.

Engine & Boat Compatibility

Designed for Yamaha F2.5 outboard engines requiring an O-ring seal within the cooling system. Commonly used in small portable Yamaha outboards. Suitable for freshwater and saltwater environments where proper sealing is essential for reliable operation.

FAQ

Q: What are signs this O-ring needs replacing?
A: Leaks, reduced cooling performance, or visible wear like cracking or flattening are common signs.

Q: Should I replace the O-ring every time I service the system?
A: Yes, it’s best practice to install a new O-ring to ensure a proper seal.

Q: Any tips for installing this O-ring?
A: Lightly lubricate it before installation and make sure it’s seated evenly without twisting.

Q: How does saltwater affect this part?
A: Salt can dry out or degrade rubber over time, so regular inspection is important.

Q: Can a worn O-ring cause overheating?
A: Yes, if it allows leaks or disrupts water flow, it can lead to cooling issues.