I recently bought a McKee Craft 16'. Everything is up to par now, thanks to all of the wonderful information shared at this forum. The only glitch is the gas gauge. Original built in boat tank 16 gallons. The gauge is original as well. The gauge is all over the place with different readings. There is power to the gauge. The question is, is the problem the gauge or the tank? Can I just buy any gauge and substitute the old one or does the gauge have to match the existing tank? Thanks in advance for any help.............L