Thermostat Location - Westerbeke 4-107

[Hunter Cambon]

Hi all,
My manuals and online equivalents don’t clearly indicate where my thermostat might be. I’m not in a location where I can take the engine apart to hunt for it for fear of not being mobile again. However, my engine is overheating and I want troubleshoot the thermostat. Any help/pictures are appreciated.

 

[terry_thatcher]

My expansion tank sits on the front of the engine. The thermostat is under the tank. If you have the engine with the tank along the side, then I don't know.