I own a 1988 Malibu Skier, and one of the things I've been thinking about upgrading on it is the fuel gauge. Specifically, I want to be able to have some kind of digital reading of how much fuel I have exactly left in the tank. Rather than having the needle gauge that moves as the boat rocks, is there a way to get a more accurate reading? One of my ideas was to have the sensor hooked up to a raspberry pi with the pi attached to a display on the dash showing the fuel level.
I am not familiar with your specific boat. In most cases the reason the needle is moving is because the float in the fuel tank is moving as the fuel sloshes back and forth in the tank.
Changing to a digital readout is not going to give you more specific information.
See this related article. How to Test and Replace your Fuel Gauge and Sending Unit