Recmar Kohler Marine Generator Thermostat Kit 23-3666 195F
REC23-3666
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Kohler Generator Thermostat Kit
195°F kit – Sierra/Recmar 23-3666
Recmar/Sierra-reference thermostat kit for specified Kohler marine generator cooling systems. The kit corresponds to 23-3666 and cross-references Kohler 352018 and 352031.
Key Features
- 195°F thermostat application
- Cross-references Kohler 352018 and 352031
- For specified CFOZ, EFOZ, EOZ and COZ generator families
- Kit format with thermostat and associated gaskets/seals as supplied
- Aftermarket service replacement
Technical Specs
| Part type | Thermostat kit |
| Temperature rating | 195°F / approx. 91°C |
| Sierra/Recmar reference | 23-3666 |
| Kohler references | 352018 / 352031 |
| 4Boats SKU | REC23-3666 |
| Supply type | Aftermarket kit |
Compatibility / Fitment Guide
Documented Kohler model families:
| 33–40 range | 33EFOZ, 33CFOZ, 40CFOZ, 40EOZ and 40EFOZ. |
| 50–65 range | 50COZ, 50CFOZ, 50EOZ, 55EFOZ, 65COZ and 65EOZ. |
| 70–100 range | 70EFOZ, 80EOZ, 80EFOZ, 99EOZ and 100EFOZ. |
| 125–150 range | 125EOZ, 125EFOZ and 150EOZ where 352018/352031 is specified. |
| Required confirmation | Generator model suffix, serial number, engine/cooling-system parts list and 195°F thermostat rating. |
| Not for | Kohler generators requiring a different thermostat number or temperature. |
The broad model list spans several revisions; the Kohler serial-specific parts diagram remains the final fitment authority.
Part Number Cross Reference
| Sierra | 23-3666 |
| Recmar | REC23-3666 |
| Kohler | 352018 / 352031 |
| 4Boats SKU | REC23-3666 |
Reference numbers are used for identification. This is a Recmar aftermarket replacement unless the listing explicitly states otherwise.
Frequently Asked Questions
Does it fit every Kohler marine generator?
No. Only models whose parts list specifies 352018, 352031 or approved 23-3666 replacement.
What is the temperature rating?
195°F, approximately 91°C.
What does the kit include?
The thermostat and associated gaskets/seals supplied in the package; compare the received contents with the service diagram.
Can I select by kW output only?
No. Use the full model and serial number.
What else should be checked?
Inspect coolant condition, housing surfaces, circulation pump and heat-exchanger flow as applicable.
Allow the generator to cool, isolate starting power and follow the Kohler service procedure.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
