Yamaha F30A Owner's Manual

Also see for F30A: Service manual Owner's manual Owner's manual Owner's manual Owner's manual

Contents

3-3EwOverpowering a boat may cause severeinstability. Do not install an outboardmotor with more horsepower than themaximum rating on the capacity plate ofthe boat. If the boat does not have acapacity plate, consult the boat manufac-turer.EMU01299Mounting HeightTo run your boat at optimum efficiency,the water-resistance (drag) of the boatand outboard motor must be made as lit-tle as possible. The mounting-height ofthe outboard motor greatly affects thewater-resistance. If the mounting-heightis too high, cavitation tends to occur, thusreducing the propulsion; and if the pro-peller tips cut the air, the engine speedwill rise abnormally and cause the engineto overheat. If the mounting-height is toolow, the water-resistance will increaseand thereby reduce engine efficiency.Mount the engine so that the anti-cavita-tion plate is in alignment with the bottomof the boat .NOTE:8 The optimum mounting height of theoutboard motor is affected by theboat/motor combination. Test runs atdifferent heights can help determine theoptimum mounting height.8 Refer to the section “TRIMMING OUT-BOARD MOTOR” for instructions onsetting the trim angle of the outboard.104014