# 682-12414-A1 Yamaha Gasket | Genuine OEM Yamaha Outboard Part

🔧 Product Description

  

Genuine Yamaha Thermostat Cover Gasket - Part Number: 682-12414-A1

  

A genuine Yamaha thermostat cover gasket for selected 9.9HP and 15HP two-stroke outboards.

  

The gasket seals the thermostat cover to the cylinder or crankcase cooling passage, preventing cooling-water leakage and maintaining the correct flow through the thermostat housing.

  

⚙️ Key Features

  

• Genuine Yamaha OEM thermostat gasket

• Correct Yamaha part number 682-12414-A1

• Used on Yamaha 9.9HP and 15HP two-stroke cooling systems

• Suitable for thermostat inspection and replacement service

• Cross-references with Sierra and aftermarket gasket numbers

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 682-12414-A1 → Supersedes 682-12414-A0

• 682-12414-A0 → Supersedes 682-12414-00

• 682-12414-00 earlier Yamaha thermostat gasket reference

  

OEM / Related Numbers:

  

• 682-12414-A1

• 682-12414-A1-00

• 68212414A100

• 682-12414-A0

• 682-12414-00

• 6E5-12411-series related thermostat

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-0836

• Recmar: REC682-12414-A1

• Direct-replacement thermostat cover gasket: 682-12414-A1

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha 9.9HP and 15HP two-stroke thermostat covers

  

Typically suits:

  

• Engine models:

• Yamaha 9.9A

• Yamaha 9.9B

• Yamaha 9.9C

• Yamaha 9.9D

• Yamaha 15A

• Yamaha 15C

• Yamaha 15D

• Yamaha 15LH 1987

• Yamaha 9.9LD 1990

  

• HP Range: 9.9HP - 15HP

• Engine Type: Yamaha carburetted two-stroke outboard

• Year Range: Approximately 1987 - 2000s, dependent on cylinder design

  

🔌 Function

  

The gasket seals the thermostat cover so cooling water remains contained within the cylinder cooling passages.

  

Common signs of failure:

  

• Water leaking around the thermostat cover

• Salt deposits or staining around the gasket joint

• Engine overheats because the cover will not seal correctly

• Gasket tears during thermostat removal

• Cover remains wet after cooling-system servicing

  

📦 Condition

  

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 6.0 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 6.00 AUD | In stock |

## Images

- 682-12414-A1 Yamaha Gasket | Genuine OEM Yamaha Outboard Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/682-12414-a1-00-gasket)
> Updated: 2026-07-11