Anybody add a mechanical water temp gauge on a TAMD 41. I can not use the electric temp gauge port due to it being a different thread. I purchased two Murphy gauges to install and need to locate a non used plug for fresh water side. I want to have a alarmed adjustable water temp gauge. The electric sender did not go off when I was at 210 deg and climbing. I changed coolant and oil and the engines seem to run a cooler. I can run about 3200 rpms and temp stays around 195 deg. I think the thermostats are wide open at 195 deg. Thanks for any input. I previously posted this question under Engines, plumbing, electronics but did not get any info/response. I just pulled my port Alternator, Tach pegged to 5000 rpms when engine is running. When both engines are running, I was showing about 13.5 volts. I assumed that both engines were charging. Let port engine run by itself and only showed 12.5 volts on house batteries, pulled Alternator and took to Broadway Auto Electric, rectifier burnt out. Complete rebuild $185. I guess water may have dripped on the alternator, maybe after a wash down or from the heat exchanger that sits directly above the Alternator. . Bought the boat with this problem. But just another way to get to know my boat. Excellent sea boat. And very dry inside the cabin. Love the Outerbanks. Al