Originally Posted by diandtom
I think the console will have to come out and the tank slide toward the front to access the sending unit. I know it not a RV but they should be almost the same. Any ideas ?
Tom, I'm thinking that you're right about RV and boat systems being similar. The first thing that needs to be ruled out is a good ground. I'm sure that corrosion on a boat may be more prone to occur so I would check that first. If you were to measure the voltage from the tank empty vs full is there any difference in the input to the gauge?
Perhaps we'll have to plan a trip up your way to check out the boat!