I have a 1991 Perkins
Prima M50 with 2000 hours in my Wauquiez 42. A buddy and me have chased this problem for a long time. The engine
panel has a tach, temp gauge, and oil
pressure light with alt light and water
temp light. The water
temp light comes on and will flicker. Sometimes it doesn't come on at all. The temp gauge appears accurate and runs about 170 (I think). I have run a laser temp thing all over the engine
and recorded the numbers. They are very consistent and I believe that the temp gauge at the panel is accurate.
The light will come on (or stay off) even with the sensor unplugged. I am not sure if there is a separate sensor for the gauge and the temp light. All sensors that I can find check out OK on the Ohm meter.
Does this problem sound familiar to anyone?
Thanks for reading