# 6AW-12412-00 Yamaha Seal | Genuine OEM Yamaha Outboard Part

🔧 Product Description

  

Genuine Yamaha Thermostat Rubber Seal - Part Number: 6AW-12412-00

  

A genuine Yamaha moulded thermostat seal for selected Yamaha four-stroke outboards.

  

The seal fits around the thermostat body inside the cylinder-head or thermostat-cover cavity, preventing cooling water from bypassing the thermostat valve.

  

⚙️ Key Features

  

• Genuine Yamaha OEM thermostat seal

• Correct Yamaha part number 6AW-12412-00

• Moulded high-temperature rubber construction

• Used with selected Yamaha inline-four, V6 and V8 thermostats

• Included in aftermarket thermostat service kits

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 6AW-12412-00 current OEM thermostat-seal reference

  

OEM / Related Numbers:

  

• 6AW-12412-00

• 6AW-12412-00-00

• 6AW-12411-00 related thermostat

• 6AW-12411-01 related thermostat

• 6DA-12411-00 related thermostat

  

Aftermarket / Verified Equivalents:

  

• Soxa Marine: thermostat kit with 6AW-12412-00 seal

• Aftermarket Yamaha thermostat and seal kit: 6AW-12411 / 6AW-12412

• Sierra: seal supplied with selected 18-3634 thermostat kits

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha cylinder-head thermostat assemblies

• High-horsepower four-stroke cooling systems

  

Typically suits:

  

• Engine models:

• Yamaha F150 four-stroke

• Yamaha F175 four-stroke

• Yamaha F200 inline-four

• Yamaha LF200 inline-four

• Yamaha F300 V8

• Yamaha LF300 V8

• Yamaha F350A, F350B and F350C V8

• Yamaha LF350A, LF350B and LF350C V8

• Yamaha thermostat assemblies using 6AW-12411 or 6DA-12411 thermostats

  

• HP Range: 150HP - 350HP

• Engine Type: Yamaha inline-four and V8 four-stroke outboard

• Year Range: Approximately 2007 onward, dependent on engine family

  

🔌 Function

  

The seal prevents cooling water from flowing around the outside of the thermostat, ensuring temperature is controlled through the thermostat valve.

  

Common signs of failure:

  

• Engine runs colder than intended

• Cooling water leaks around the thermostat cover

• Engine temperature fluctuates

• Seal is swollen, hardened or split

• Thermostat sits loosely in its housing

  

📦 Condition

  

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 15.45 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 15.45 AUD | In stock |

## Images

- 6AW-12412-00 Yamaha Seal | Genuine OEM Yamaha Outboard Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/6aw-12412-00-00-seal)
> Updated: 2026-07-11