Cylinder Head Gasket Yamaha Outboard F 8 9.9 HP 4-Stroke 6G8-11181-A0 18-3827

Cylinder Head Gasket for Yamaha

This cylinder head gasket for Yamaha F 8 and 9.9 HP 4-stroke outboards seals the cylinder head to the engine block, referencing OEM 6G8-11181-A0 and aftermarket 18-3827.

Overview

This cylinder head gasket for Yamaha F 8 and 9.9 HP 4-stroke outboards is a direct replacement sealing component. It prevents compression loss and coolant leaks between the cylinder head and block, keeping the outboard running reliably. Built for 8 and 9.9 HP four-stroke engines, this gasket restores the sealing surface during top-end repairs.

Built For Performance

• Constructed to match OEM dimensions for Yamaha part 6G8-11181-A0
• Replaces aftermarket part number 18-3827
• Designed for 4-stroke outboard cylinder head sealing
• Provides a tight seal for combustion pressure and coolant passages
• Engineered for F 8 and 9.9 HP model service

Fits These Machines

• for Yamaha F8 outboard
• for Yamaha F9.9 outboard

On-The-Job Use

• Cylinder head resealing during top-end overhaul
• Replacing leaking head gaskets on 4-stroke outboards
• Restoring compression in 8 and 9.9 HP 4-stroke outboards
• Rebuilding after overheating or head removal

Specs At A Glance

Good To Know

Q: Will this gasket fit a 9.9 HP 4-stroke outboard? A: Yes, it is designed for Yamaha F 8 and 9.9 HP 4-stroke outboards and references OEM 6G8-11181-A0. Confirm the serial number before ordering.

Q: When should the head gasket be replaced? A: Replace the gasket whenever the cylinder head is removed during top-end service. This prevents compression leaks and cooling system contamination.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.