# 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

  

🔄 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

  

🚤 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

  

📦 Condition

  

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 83.0 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 83.00 AUD | In stock |

## Images

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

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/6ce-12411-00-thermostat)
> Updated: 2026-07-11