clemsonfor
Super Member
Um if the gauge moves that meant the sensor was good right? And I'm not so sure your battery is not weak or bad as well. After a day or so I would expect the resting volts to be closer to 12.6! My boat battery when I took battery tender off it was right round 13 v after a few days. When sitting without tenders they always were 12.6 ish. I have always been told 12.65 is a good battery. Yours leads me to think u have a bad battery so that when u check volts at battery as it running instead of seeing 13 something u see lower due to a funny acting potentially suspect battery.