i have just bought a 1988 24 ft offshore it has one of the fuel tanks missing . it has the one in the front that takes up all the space in that compartment . the back compartment has a open space, and in the back of that space is the water tank . just wondering the fuel tank size of the one in the front, and do i need the one in the back . and does anyone know the size of the one in the back . thanks for the help