# 6E5-12411-02 Yamaha Thermostat | Genuine OEM Yamaha Outboard Part

🔧 Product Description

  

Genuine Yamaha Outboard Thermostat - Part Number: 6E5-12411-02

  

A genuine Yamaha cooling-system thermostat for selected portable, commercial and mid-range two-stroke outboards.

  

The thermostat regulates cooling-water flow according to engine temperature, helping the engine warm correctly while preventing excessive operating temperature.

  

⚙️ Key Features

  

• Genuine Yamaha OEM cooling-system thermostat

• Correct Yamaha part number 6E5-12411-02

• Supersedes earlier 6E5-12411-00 and 6E5-12411-01 references

• Commonly catalogued with a 50°C to 60°C opening specification

• Cross-references with Sierra, Recmar, GLM, Honda, Mercury and Parsun thermostats

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 6E5-12411-02 → Supersedes 6E5-12411-01

• 6E5-12411-01 → Supersedes 6E5-12411-00

• 6E5-12411-00 earlier Yamaha thermostat reference

• 677-12411-00 earlier related Yamaha thermostat reference

  

OEM / Related Numbers:

  

• 6E5-12411-02

• 6E5-12411-02-00

• 6E5124110200

• 6E5-12411-01

• 6E5-12411-00

• 677-12411-00

• Honda Marine: 19300-881-761

• Mercury / Mariner: 11919001

• Mercury / Mariner: 11919M

• Mercury / Mariner: 83282M

  

Aftermarket / Verified Equivalents:

  

• Sierra: 18-3623

• Recmar: REC19300881761

• GLM: 13320

• Honda Marine: 19300-881-761

• Mercury / Mariner: 11919001

• Mercury / Mariner: 11919M

• Mercury / Mariner: 83282M

• Parsun: T15-04000010

  

🚤 Compatibility

  

Commonly used on:

  

• Yamaha portable and mid-range two-stroke cooling systems

• Yamaha-based Japanese Mariner and corresponding Parsun applications

  

Typically suits:

  

• Engine models:

• Yamaha 3A and Malta 3HP

• Yamaha 4A and 4B

• Yamaha 5C

• Yamaha 6C and 6D

• Yamaha 8C and 8F

• Yamaha 20D

• Yamaha E25A

• Yamaha 25A, 25B, E25B, 25J, 25N and 25V

• Yamaha 30D, 30G, 30H and E30H

• Yamaha C30 from approximately 1993 onward

• Yamaha C40 two-cylinder - approximately 1991-1997

• Yamaha 40Q two-cylinder - approximately 1990-1998

• Yamaha 40X and E40X

• Yamaha C55 two-cylinder - approximately 1989-1995

• Yamaha 55B two-cylinder - approximately 1992-2003

• Yamaha 115A, 140A, 150A, 175A, 200A and 220A applications using the 6E5 thermostat family

  

• HP Range: 3HP - 220HP, dependent on cooling-system design

• Engine Type: Yamaha carburetted two-stroke outboard

• Year Range: Approximately 1980s - 2010s, dependent on engine family

  

🔌 Function

  

The thermostat restricts cooling-water flow while the engine warms and opens as operating temperature rises.

  

Common signs of failure:

  

• Engine overheats because the thermostat remains closed

• Engine runs excessively cold because the thermostat remains open

• Temperature fluctuates during operation

• Salt or corrosion restricts thermostat movement

• Poor idle quality or excessive fuel use during warm-up

  

📦 Condition

  

• Genuine Yamaha part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 54.74 AUD
- **Vendor:** Yamaha
- **Tags:** Yamaha Marine Parts | Outboard Engine Parts & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 54.74 AUD | In stock |

## Images

- 6E5-12411-02 Yamaha Thermostat | Genuine OEM Yamaha Outboard Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/6e5-12411-02-thermostat)
> Updated: 2026-07-11