Recmar Yanmar 3JH 4JH Thermostat 76.5°C 129470-49801
REC129470-49801
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Yanmar 76.5°C Thermostat
3JH / 4JH / TNE / TNV Application Family
Aftermarket 76.5°C thermostat replacing Yanmar 129470-49801 across a broad range of JH marine and TNE/TNV industrial engines. Exact engine suffix matters because the same base family can contain different cooling specifications.
Key Features
- Opening temperature 76.5°C
- For selected Yanmar 3JH and 4JH marine diesels
- Also listed on selected 4TNE/4TNV installations
- Direct part-number replacement
- Recmar aftermarket thermostat
Technical Specs
| Type | Coolant thermostat |
| Temperature | 76.5°C |
| Engine type | Yanmar marine / industrial diesel |
| OEM reference | 129470-49801 |
| SKU | REC129470-49801 |
Compatibility / Fitment Guide
| Engine family | Verified application | Notes / exclusions |
|---|---|---|
| Yanmar 3JH | 3JH25A, 3JH30A, 3JH2E/L/TE and selected 3JH3/3JH4/3JH5 variants | Match complete suffix and parts-book reference. |
| Yanmar 4JH | 4JH2E/TE/DTE/HTE/LTE and selected 4JH3/4JH4/4JH5/4JH110 variants | Broad family coverage; not every 4JH uses this thermostat. |
| Yanmar industrial | Selected 4TNE84/88 and 4TNV installations | Confirm equipment-specific parts list; marine fitment does not prove industrial fitment. |
Always verify the model year, complete model code and original cooling-system references before ordering.
Part Number Cross Reference
| Yanmar | 129470-49801 |
| 4Boats SKU | REC129470-49801 |
This is a Recmar aftermarket replacement; manufacturer names and part numbers are used only for identification.
Frequently Asked Questions
Is 76.5 the diameter?
No. It is the thermostat opening temperature in °C.
Will it fit every 4JH?
No. Verify the full engine suffix and 129470-49801 reference.
Are gaskets included?
Order according to the product image; replace any sealing parts specified separately in the engine manual.
Installation note: Service only on a cool engine; inspect the housing, passages and sealing surfaces, and test for correct water flow after installation.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
