Recmar Yanmar 4LH 4LHA 4TNE 4TNV Thermostat Gasket 121850-49550
REC121850-49550
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Yanmar Thermostat Gasket
4LH / 4LHA / TNE / TNV | 121850-49550
Aftermarket Recmar gasket for Yanmar thermostat housings using reference 121850-49550.
VERIFY BEFORE ORDERING: This gasket shares applications with several engines but not every thermostat uses it. Match the gasket outline, bolt holes and parts-book reference.
Key Features
- Single thermostat gasket
- Yanmar LH/LHA and selected TNE/TNV engines
- Aftermarket Recmar replacement
- For fresh-water-pump/thermostat housing assembly
- Thermostat not included
Technical Specs
| Part type | Thermostat gasket |
| Supply | 1 gasket |
| Thermostat commonly paired | 121850-49811 where specified |
| 4Boats SKU | REC121850-49550 |
Compatibility / Fitment Guide
| Application | Verified fitment | Checks / exclusions |
|---|---|---|
| Yanmar 4LH / 4LHA marine | Examples: 4LHA-DTE/DTZE/HTE/HTZE/STE and 4LH-WST/STZ variants in official catalogues | Match complete suffix and diagram. |
| Yanmar TNE / TNV | 4TNE92-NMH; selected 4TNE98, 4TNV94/98 and 4TN100 applications | Industrial/generator layouts must be checked individually. |
| Physical match | Parts catalogue specifies 121850-49550 | Not interchangeable with gasket 121850-49540 by assumption. |
Final fitment check: Confirm 121850-49550 in the exact thermostat assembly and compare gasket shape.
Part Number Cross Reference
| Yanmar | 121850-49550 |
| Related thermostat (selected applications) | 121850-49811 |
| Recmar / 4Boats | REC121850-49550 |
Frequently Asked Questions
Is the thermostat included?
No, gasket only.
Does it fit all 4LH engines?
No. Confirm the full suffix and parts diagram.
Is it genuine Yanmar?
No. It is aftermarket Recmar.
Remove all old gasket residue without damaging the sealing faces.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
