Thermostat kit for Volvo Penta 5.0GXI 8.1GXI RO: 3831426 freshwater cooling 70°C

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Thermostat kit for Volvo Penta

Poseidon Marine thermostat kit.


Reference to OEM part number:

RO: 3831426

Rated Temperature: 70°C 158°F

Suitable for the following Volvo Penta engines


  • 5,0GXi-EF 5,0OSi-EF
  • 8,1GSi-A 8,1GSi-L-A 8,1GXi-A 8,1GXi-AF 8,1GXi-B 8,1GXi-BF
  • 8,1GXi-C 8,1GXi-CF 8,1GXiL-A 8,1GXiL-B 8,1GXiL-C
  • 8,1Gi-A 8,1Gi-B 8,1Gi-BF 8,1Gi-C 8,1Gi-CF 8,1Gi-D 8,1Gi-DF
  • 8,1GiL-A 8,1GiL-B 8,1GiL-C 8,1GiL-D
  • 740B**
  • DPX375-A
  • DPX375-B DPX375-BF
  • DPX375-CF
  • DPX420-A
  • DPX420-B DPX420-BF
  • DPX420-CF
  • AD40B* AQAD40A* AQAD40B* AQD40A* MD40A*
  • TAMD40A* TAMD40B* TMD40A* TMD40B* TMD40C*

* 1 piece required

** With Volvo-Penta fresh-water cooling


The role of the thermostat is extremely important, as it is the part that regulates the temperature of the engine, by allowing cooling fluid/raw water to cool down the engine. Therefore it is suggested to be checked regularly and replaced as per the manufacturer maintenance schedule.