1982 470 Temp Gauge/Temp Sensor.

[wrestling coach]

My temp gauge suddenly does not work. I checked the obvious loose wire condition but all is in place Gauge moves slight[y with the key on and off. Reads no higher than 100* which is low peg on my gauge. I have yet to ground the lead at the sensor to see if the gauge pegs hot. I ran out of time. Where is a good source for a new sensor?

 

[stonyloam]

#17 here: https://www.mercruiserparts.com/Sho...r=7&bdesc=Exhaust+Manifold+and+Elbow(INBOARD). OEM or search for the part #

 

[wrestling coach]

I grounded the temp sensor lead with the key on and the gauge pegged hot. Replaced temp sensor and all is back working.