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

🚤 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

🔄 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

📦 Condition

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