6H3-11181-A2 Yamaha Gasket | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha Current-Service Cylinder Head Gasket - Part Number: 6H3-11181-A2

A genuine Yamaha current-service cylinder-head gasket for selected 50HP, 60HP and 70HP three-cylinder two-stroke outboards.

This gasket is the later replacement for the earlier 6H3-11181-00, -01, -A0 and -A1 versions.

⚙️ Key Features

• Genuine Yamaha OEM cylinder-head gasket

• Correct current part number 6H3-11181-A2

• Completes the supersession chain from the earlier 6H3-11181 references

• Seals combustion and cooling-water passages

• Sierra 18-3831 and other aftermarket replacements available

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 6H3-11181-A2 → Supersedes 6H3-11181-A1

• 6H3-11181-A1 → Supersedes 6H3-11181-A0

• 6H3-11181-A0 → Supersedes 6H3-11181-01

• 6H3-11181-01 → Supersedes 6H3-11181-00

• 6H3-11181-00 original Yamaha reference

OEM / Related Numbers:

• 6H3-11181-A2

• 6H3-11181-A2-00

• 6H311181A200

• 6H3-11181-A1

• 6H3-11181-A0

• 6H3-11181-01

• 6H3-11181-00

• 6H3-11193-A1 related head-cover gasket

Aftermarket / Verified Equivalents:

• Sierra: 18-3831

• Recmar: REC6H3-11181-A2

• Asaki: 6H3-11181-A2

• Yamarine: 6H3-11181-A2

• YiheoZux: 6H3-11181-A2

🚤 Compatibility

Commonly used on:

• Yamaha 6H3-series three-cylinder powerheads

Typically suits:

• Engine models:

• Yamaha 25B

• Yamaha 50G

• Yamaha 60F

• Yamaha E60H

• Yamaha C60

• Yamaha 70B

• Yamaha 70C

• Yamaha 60TL and 70TL three-cylinder engines

• HP Range: Commonly 50HP - 70HP, plus selected 25B models

• Engine Type: Yamaha carburetted three-cylinder two-stroke outboard

• Year Range: Approximately 1984 - 2019, dependent on cylinder-head design

🔌 Function

The gasket seals combustion pressure at the cylinder head while separating the cylinders from the cooling-water passages.

Common signs of failure:

• Compression loss between cylinders

• Water intrusion into a combustion chamber

• Exhaust gas bubbles in the cooling system

• Overheating or persistent misfire

• Leakage around the cylinder-head joint

📦 Condition

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging