Operation

tends to occur, thus reducing the propulsion; and if the propeller tips cut the air, the engine speed will rise abnormally and cause the engine to overheat. If the mounting height is too low, the water resistance will increase and thereby reduce engine efficiency. Mount the outboard motor so that the anti-cavitation plate is between the bottom of the boat and a level 25 mm (1 in.) below it.

EWM00640

WARNING

Loose clamp screws could allow the outboard motor to fall off or move on the tran- som. This could cause loss of control and serious injury. Make sure the transom screws are tightened securely. Occasionally check the screws for tightness during operation.

0–25mm

(0–1in.)ZMU02011

ZMU02012

NOTE:

●The optimum mounting height of the out- board motor is affected by the boat and mo- tor combination and the desired use. Test runs at different heights can help determine the optimum mounting height. Consult your Yamaha dealer or boat manufacturer for further information on determining the prop- er mounting height.

●For instructions on setting the trim angle of the outboard motor, see page 36.

EMU26970

Clamping the outboard motor

1.Place the outboard motor on the transom so that it is positioned as close to the cen- ter as possible. Tighten the transom clamp screws evenly and securely. Oc- casionally check the clamp screws for tightness during operation of the out- board motor because they could become loose due to engine vibration.

2.If the engine restraint cable attachment is equipped on your engine, an engine re- straint cable or chain should be used. At- tach one end to the engine restraint cable attachment and the other to a secure mounting point on the boat. Otherwise the engine could be completely lost if it accidentally falls off the transom.

ZMU02013

25