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

🚤 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

🔄 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

📦 Condition

• Genuine Yamaha part
• Brand new
• Supplied in original or equivalent packaging