I just list a vintage FIBERFAB MIGI ll Motometer on ebay.. Was a real working model and still works I tested it in hot 190 degree WATER AND THE RED IN THE GUAGE DID RAISE AN HALF INCH ..
The listing is 150450014176.. and goes for seven days
That thing is cool. Stupid question: I know a MotoMeter usually screws into the radiator cap with the bulb just below, taking the temperature of the coolant just below the gauge. So how does this one work, presuming the actual radiator is not the thing this thing sits on?