I have a 1993 Mercury outboard, 3 cylinder, 90 HP. It has a temperature sensor that is supposedly conected to a temperture gage. The gage has never moved so I figured the gage was bad. I installed a new gage but it too did not register anything.
I heated up the sensor outside of the motor and got the alarm on the motor to sound so I believe the sensor works. The sensor looks like a bronze probe with a single wire connected to it.
Question: does this type of sensor provide a signal that can be registered on the gage or does this sesnor only sound an alarm if the engine gets too hot, thereby making the temp gage nothing more than a decoration on the dash board?