# 6H3-45113-A0 Yamaha Gasket Upper Casing | Genuine OEM Yamaha Outboard Part

🔧 Product Description

  

Genuine Yamaha Upper Casing to Powerhead Gasket - Part Number: 6H3-45113-A0

  

A genuine Yamaha upper-casing gasket for selected 50HP, 60HP and 70HP two-stroke outboards.

  

The gasket seals the powerhead or exhaust-guide assembly to the upper casing, containing exhaust gases and cooling water at the mounting joint.

  

⚙️ Key Features

  

• Genuine Yamaha OEM upper-casing gasket

• Correct Yamaha part number 6H3-45113-A0

• Used between the powerhead or exhaust guide and upper casing

• Important replacement whenever the powerhead is removed

• Asaki and direct aftermarket replacements available

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 6H3-45113-A1 later related service reference

• 6H3-45113-A0 → Supersedes 6H3-45113-00

• 6H3-45113-00 earlier Yamaha upper-casing gasket reference

  

OEM / Related Numbers:

  

• 6H3-45113-A0

• 6H3-45113-A0-00

• 6H345113A000

• 6H3-45113-A1

• 6H3-45113-00

• 6H3-W0001-series related powerhead gasket kit

• Related exhaust-guide and upper-casing gasket references

  

Aftermarket / Verified Equivalents:

  

• Asaki: 6H3-45113-A0

• Yamarine: 6H3-45113-A0

• Copkingo Marine: 6H3-45113-A0 replacement gasket

• Direct aftermarket two-piece gasket set: 6H3-45113-A0

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha three-cylinder two-stroke upper-casing and powerhead joints

  

Typically suits:

  

• Engine models:

• Yamaha 50G

• Yamaha C60

• Yamaha E60

• Yamaha P60

• Yamaha 60F and 60FETO

• Yamaha 60TLR

• Yamaha 70B

• Yamaha C70

• Yamaha 70TLR and 70TRP

• Yamaha P60TLHP 1991

• Yamaha 60TLRNC 2004

  

• HP Range: 50HP - 70HP

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

• Year Range: Approximately 1990s - 2000s, dependent on upper-casing design

  

🔌 Function

  

The gasket seals exhaust and cooling-water passages between the powerhead or exhaust guide and the upper casing.

  

Common signs of failure:

  

• Exhaust staining around the powerhead base

• Water leakage into the upper casing

• Salt deposits around the mounting joint

• Exhaust noise from the midsection

• Replacement required after powerhead removal

  

📦 Condition

  

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 40.6 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 40.60 AUD | In stock |

## Images

- 6H3-45113-A0 Yamaha Gasket Upper Casing | Genuine OEM Yamaha Outboard Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/6h3-45113-a0-gasket-upper-casing)
> Updated: 2026-07-11