Rmp gauge is at about 10 and volt gauge does not move. Fuel gauge when key is off is all the way past full. When I turn key on the fuel gauge goes to f and the other 2 gauges don't move. The three needles are all in one gauge. There is power to the gauge because the light behind it comes on. I did just have waterpump and t/stat replaced. Yamaha 75hp 4 stroke.