Yamaha-Mercury 9.9HP 4Stroke Gasket Cylinder Head RO: 6G8-11181-A1-00, 825482

Cylinder Head Gasket for Yamaha-Mercury 9.9HP 4Stroke

This cylinder head gasket is a replacement part for a Yamaha-Mercury 9.9HP 4-stroke engine, matching OEM part numbers 6G8-11181-A1-00 and 825482.

Overview

This cylinder head gasket seals the top of the cylinder block on a Yamaha-Mercury 9.9HP 4-stroke engine. It fits between the head and block, forming a dense seal that keeps combustion and coolant flow separated. A proper cylinder head gasket is essential when performing top end service on this powerhead.

Built For Performance

• Direct replacement for the OEM cylinder head gasket number 6G8-11181-A1-00
• Matched to the 9.9HP four-stroke head deck surface
• Precise cooling port alignment for the cylinder head
• Cross references Mercury head number 825482 for added fit
• Resilient material designed for a marine engine heat cycle

Fits These Machines

• for Yamaha 9.9HP four-stroke outboards
• for Mercury 9.9HP four-stroke outboards

On-The-Job Use

• Replacing a leaking head gasket during a top end repair
• Reinstalling the cylinder head after a valve job
• Completing cooling system maintenance on a four-stroke outboard

Specs At A Glance

Good To Know

Q: Is the head gasket sold by itself? A: Yes, this listing covers a single cylinder head gasket.

Q: What torque pattern should be followed? A: Use the engine manufacturer's torque sequence and tighten the head bolts in the specified stages.

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