Recmar Yanmar 2GMF 3GMF 3HMF Thermostat 71°C 121750-49800
REC121750-49800
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Regular price£20.13
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Tax included.
Yanmar GM / HM Thermostat
71°C | Fresh-Water-Cooled Engines
Aftermarket 71°C thermostat for selected fresh-water-cooled Yanmar 2GMF, 3GMF and 3HMF marine diesel engines using reference 121750-49800.
FITMENT CHECK: The F suffix identifies the fresh-water-cooled configuration. Raw-water-cooled 2GM/3GM engines use a different thermostat arrangement.
Key Features
- 71°C opening temperature
- For selected 2GMF/3GMF/3HMF engines
- Fresh-water/closed-cooling circuit
- Replaces 121750-49800
- Recmar aftermarket thermostat
Technical Specs
| Part type | Coolant thermostat |
| Temperature | 71°C |
| Cooling system | Fresh-water / closed cooling |
| Engine family | GMF / HMF |
| SKU | REC121750-49800 |
Compatibility / Fitment Guide
| Engine family | Verified models | Notes |
|---|---|---|
| 2GMF | 2GMF, 2GM20F and 2GM20F-YEU | Confirm full suffix. |
| 3GMF | 3GMF, 3GM30F and 3GM30F-YEU | Use parts-book reference. |
| 3HMF / 3HM35F | Applicable engines using 121750-49800 | Verify serial and cooling system. |
| Exclusion | Raw-water-cooled 1GM/2GM/3GM | Different thermostat. |
Confirm the complete model suffix, serial number, temperature specification and OEM reference.
Part Number Cross Reference
| Yanmar | 121750-49800 |
| Associated cover gasket | 129350-49541 application |
| 4Boats SKU | REC121750-49800 |
Recmar aftermarket replacement; Yanmar references identify fitment only.
Frequently Asked Questions
Does it fit raw-water-cooled 3GM?
No. The verified application is fresh-water-cooled.
What temperature is it?
71°C.
Does it fit 3HM35F?
Yes where the parts book lists 121750-49800.
Installation note: Fit the specified new gasket/seal, bleed the cooling circuit where required and check operating temperature.
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