Thanks for the responses. As I said I just bought it and still learning some things about it. I went and filled up the port tank that I ran down and after turning on the master power and then turning on the "fuel port" switch the gauge reads full. This would be correct for that tank now. So....if I turn that switch off should it read the amount of fuel in the starboard tank? If so maybe I have a bad sending unit on that tank. What do you think?

Thanks again!