This past weekend I noticed that my dash gas gauge was showing a full tank of gas. I knew this was not correct. I estimated I had about a half tank or less remaining. This model has a built in gas tank which holds approximately 19 gallons of gas. I checked the wires going to the tank. According to the wiring schematic which one of the members at the forum kindly sent me when I was having a stereo problem, these wires connect to a sender. I disconnected one of the wires and noted the gas gauge dropped to empty which I suppose is to be expected. Please keep in mind that I am a novice when it comes to wiring on my pontoon. Dwelling wiring I'm fairly compete. I checked the two fuses back in the battery compartment. Both were OK. The wiring schematic doesn't show a fuse between the gas tank sender and the dash gauge. I'm assuming the gas tank sender is defective and needs replacing. What I need to know is are these senders generic or do I need to remove the sender and take it to my local boat service department and have them recommend a replacement? Any advice would be appreciated.