40-0014404 Radiator lower hose, Hercules radiator hose for the 1600 series engines.40 0014404 Radiator hose, for the 1600 series Hercules engines, most likely used on a generator build. Diameter of the opening near the part number is 1. 5 inches in diameter, the other opening, measures 1. 75 inches. This is a suction lower hose and has the coiled wire to prevent suction collapse. This hose was used on the DMT 25GH generator with the 16600 gaseous engine