3C7-01030-0 Tohatsu Marine Thermostat | Genuine OEM Outboard Part

🔧 Product Description

Genuine Tohatsu / Nissan 60°C Thermostat - Part Number: 3C7-01030-0

A genuine Tohatsu/Nissan 60°C cooling-system thermostat for selected 60-140 HP two-stroke and TLDI outboards. It regulates coolant flow through the cylinder block so the engine warms correctly at idle while receiving full cooling flow under load.

⚙️ Key Features

• Genuine Tohatsu/Nissan wax-pellet thermostat

• Nominal opening specification: 60°C

• Correct flange, valve travel and spring calibration for the 3C7 cooling system

• Used on conventional two-stroke and direct-injection TLDI engines

• Thermostat cover gasket should be inspected and renewed separately where required

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 3C7-01030-0 / 3C7010300M → current genuine service reference

• 3T9-01032-1 → alternate/cross-referenced thermostat on selected applications; verify by engine diagram

OEM / Related Numbers:

• 3C7-01030-0

• 3C7010300M

• 3C7010300

• 3T9-01032-1

Aftermarket / Verified Equivalents:

• Aftermarket 60°C thermostat replacements cross-referencing 3C7-01030-0

• Use only replacements with the correct 60°C calibration and valve dimensions

🚤 Compatibility

Commonly used on:

• M60B and M60C

• M70B and M70C

• MD70B and MD70B AQ

• MD75C2

• MD90B, MD90B AQ and MD90C2

• M115A2 and MD115A/MD115A2

• M120A and M120A2

• M140A and M140A2

Typically suits:

• HP Range: 60-140 HP

• Engine / System Type: Two-stroke or TLDI outboard cooling system

• Year Range: Approximately 1990s-2018, model dependent

• Serial / Identification Range: Confirm the complete model code and thermostat diagram. Some adjacent 60-140 HP families use different thermostat temperatures or housing arrangements.

🔌 Function

Restricts cooling-water flow while the engine is cold, then progressively opens near its calibrated temperature to stabilise combustion temperature and prevent overheating.

Common signs replacement or service is required:

• Engine runs too cold, idles poorly or produces excess carbon

• Overheat warning despite adequate water-pump output

• Thermostat is stuck open, stuck closed or heavily corroded

• Salt deposits restrict valve movement

• Thermostat does not begin opening near the specified temperature

📦 Condition

• Genuine Tohatsu / Nissan OEM part, brand new.

• Brand new

• Supplied in manufacturer or equivalent protective packaging