Recmar Yanmar 4LH 4LHA Thermostat 71°C 121850-49811
rec121850-49811
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Regular price£22.97
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Yanmar 4LH / 4LHA 71°C Thermostat
121850-49811 | Marine and TNE/TNV applications
Aftermarket Recmar 71°C thermostat corresponding to Yanmar 121850-49811 for specified 4LH/4LHA marine diesels and selected TNE/TNV industrial engines.
VERIFY BEFORE ORDERING: Match the complete engine suffix and 71°C rating. The required gasket is normally a separate reference and is not assumed to be included.
Key Features
- 71°C coolant thermostat
- Aftermarket Recmar replacement
- Verified 4LH and 4LHA marine engine coverage
- Selected 4TNE/4TNV industrial applications
- Thermostat only unless stated otherwise
Technical Specs
| Part type | Engine-coolant thermostat |
| Opening rating | 71°C |
| Engine type | Yanmar diesel |
| Supply | Thermostat; verify gasket separately |
| 4Boats SKU | rec121850-49811 |
Compatibility / Fitment Guide
| Engine group | Verified models | Checks / exclusions |
|---|---|---|
| Yanmar 4LHA marine | 4LHA-DTZE, DTZP, STE, STP, STZE, STZP | Confirm suffix and OEM number. |
| Yanmar 4LH marine | 4LH-DTE, HTE, TE | Do not extend to unlisted 4LH variants. |
| Yanmar industrial | 4TNE88; 4TNE98 direct/indirect injection; 4TNV94L; 4TNV98; 4TNV98T | Industrial accessory/cooling layouts must be checked by exact model. |
Final fitment check: Confirm 121850-49811, 71°C, engine suffix and thermostat dimensions. Check whether gasket 121850-49540 or 121850-49550 applies.
Part Number Cross Reference
| Yanmar thermostat | 121850-49811 |
| Yanmar gaskets (application-specific) | 121850-49540; 121850-49550 |
| Recmar / 4Boats | REC121850-49811 |
Frequently Asked Questions
Is this genuine Yanmar?
No. It is an aftermarket Recmar thermostat.
What is the rating?
71°C.
Is the gasket included?
Do not assume so. Verify and order the engine-specific gasket separately if needed.
Does it fit every 4LH?
No. Use the listed suffixes and part number.
Do not install a thermostat with a different temperature rating unless Yanmar specifies the change.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
