# 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

## Details

- **Price:** 102.64 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 102.64 AUD | In stock |

## Images

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

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/6h3-11181-a2-gasket)
> Updated: 2026-07-11