6.6 US gallon capacity, 19 in. x 12-1/2 in. x 11-1/8 in. tank with a "Diurnal Cap" and Mercury's Fuel Demand Valve. An integral fuel gauge is included along with provision for fuel line quick disconnect. Weight: 7 lbs Length: 19.25 inches Width: 12.5 inches Height: 11.75 inches