I recently purchased a 17' 1990 glastron Sierra with an 86 Johnson 120 outboard on it. After servicing the motor and small odds and ends on the boat (like pumping the fuel tank empty)I took it to the gas station to put 10 gallons of fuel in for the trial run. Would only take 5 gallons. Crap. Filled a 5 gallon jug and went on my way. Shortly after I launched, about five gallons worth of time it died. Put more fuel in and fired it fired up, back to the trailer. The floor on the boat was replaced somewhere down the line so I'm hoping that the old, possibly broken tank wasn't replaced with a 5 gallon tank? That would be insane right? Is there any place I can find detailed information on things like fuel capacity, stringer location for this particular boat? Or is this a "there's only one way to find out" situation? Oh ya, this is my first boat. Can anyone help? Thanks.