SAIL-DRIVE OPERATION ENGINE COOLING WATER Opening or closing the cooling water system of the engine driving the Sail-Drive is done by the cooling water cock fixed on the upper case of the Sail-Drive. Be sure to open the cock (Figure 5, (1)) and confirm that the cooling water has suction by cranking the engine before starting the vessel. The cooling water passes through the Sail-Drive case, cools the engine by the cooling water pump, and is then discharged. SD20 (5) (2) (1) (3) (4) 0005447 Figure 5 1 Cooling Water Cock 2 Cooling Water Hose 3 To Cooling Water Pump 4 Hose Clamp 5 Seawater Inlet SD Operation Manual 29 © 2009 Yanmar Marine International