. Insert the clip between the two pieces of the crank arm (Fig. 2). The positioning screw ust be loose to give clearance. 3. Push the clip in until it snaps tut a groove in the sail. 4. Tighten the tension screw securely. 5. After tightening the positioning resew (see instructions for motor), be sure the crank arm is firmly installed on the shaft. Avoid the incorrect position shown in Fig.