3-3EEMU01298Mounting HeightTo run your boat at optimum efficiency, thewater-resistance (drag) of the boat and out-board motor must be made as little as possi-ble. The mounting-height of the outboardmotor greatly affects the water-resistance. Ifthe mounting-height is too high, cavitationtends to occur, thus reducing the propulsion;and if the propeller tips cut the air, theengine speed will rise abnormally and causethe engine to overheat. If the mounting-height is too low, the water-resistance willincrease and thereby reduce engine effi-ciency. Mount the engine so that the anti-cavitation plate is between the bottom of theboat and a level 25 mm (1 in.) below it.NOTE:@ The optimum mounting height of the out-board motor is affected by the boat/motorcombination and the desired use. Testruns at different heights can help deter-mine the optimum mounting height. Refer to the section “TRIMMING OUT-BOARD MOTOR” for instructions on set-ting the trim angle of the outboard.@