6CE-12411-00 Yamaha Thermostat | Genuine OEM Yamaha Outboard Part

🔧 Product Description

Genuine Yamaha 140°F 4.2L V6 Thermostat - Part Number: 6CE-12411-00

A genuine Yamaha thermostat for selected 4.2-litre V6 four-stroke outboards.

The thermostat regulates cooling-water flow through the cylinder block and heads, allowing the engine to warm correctly before opening at approximately 140°F.

⚙️ Key Features

• Genuine Yamaha OEM thermostat
• Correct Yamaha part number 6CE-12411-00
• Approximately 140°F operating temperature
• Used on Yamaha F225, F250 and F300 4.2L V6 outboards
• Sierra and aftermarket replacement thermostats available

🚤 Compatibility

Commonly used on

• Yamaha 4.2L V6 four-stroke cylinder-head cooling systems
• Conventional and VMAX SHO V6 outboards

Typically suits

• Engine models:
• Yamaha F225F
• Yamaha LF225F
• Yamaha F225NCA
• Yamaha F225XB
• Yamaha F225XCA
• Yamaha F250D
• Yamaha LF250D
• Yamaha F250NCA
• Yamaha F250UCA
• Yamaha F250XB
• Yamaha F250XCA
• Yamaha F300B
• Yamaha LF300B
• Yamaha VF250 VMAX SHO
• Yamaha 4.2L F225, F250 and F300 engine families
• HP Range: 225HP - 300HP
• Engine Type: Yamaha 4.2L V6 four-stroke outboard
• Year Range: Approximately 2010-2022, dependent on model

🔌 Function

The thermostat restricts water flow during warm-up and opens at its calibrated temperature to keep the engine within its designed operating range.

⚠️ Common Signs of Failure

• Engine overheats because the thermostat remains closed
• Engine runs too cold because the thermostat remains open
• Temperature varies between cylinder banks
• Salt deposits restrict valve movement
• Over-temperature or low-temperature fault indications

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 6CE-12411-00 current OEM thermostat reference

OEM / Related Numbers

• 6CE-12411-00
• 6CE-12411-00-00
• 67F-12412-00 related thermostat seal
• 6CE124110000

Aftermarket / Verified Equivalents

• Sierra: 18-3524
• JLM Marine: 6CE-12411-00 replacement thermostat
• IWBR: 6CE-12411 thermostat
• R2948 / 137A replacement reference

📦 Condition

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