Water heated intake/Electric fan temp sensor

What he said....
I watched ice form on the outside of my carb on a 60 degree damp morning. Was up until that day i couldnt figure out how to make it run during warm up. It was a teener. Added the exh shroud and warm air tube. Cured it.

Usually the temp sensors are 1/4” npt and thread into radiator petcock.
I added a second bung from a crapped out rad to retain a hassle free rad drain.