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