# 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

## Details

- **Price:** 96.64 AUD
- **Vendor:** Tohatsu
- **Tags:** Tohatsu Outboard Parts | Marine Engine Components & Spares

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 96.64 AUD | In stock |

## Images

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

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3c7-01030-0-thermostat)
> Updated: 2026-08-01