I have a 2007 F250TXR. I am having issues with the fuel gage. With boat sitting in my driveway on level ground the gage reads full. It has been an issue since I purchased the boat (March-2008). I decide to fill tank today just to see how much fuel was in the tank. It took 52 gallons. Tank is 100 gallons. I read the manual and it shows dipswitches..Any thoughts before it goes back to the dealer??