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Mount the outboard motor on the center line (keel line) of the boat, and ensure that the boat itself is well balanced. Otherwise, the boat will be hard to steer. For boats without a keel or which are asymmetrical, consult your dealer.

1 Center line (keel line)

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Mounting Height

To run your boat at optimum efficiency, the water-resistance (drag) of the boat and outboard motor must be made as little as possible. The mounting height of the outboard motor greatly affects the water-resistance. If the mounting height is too high, cavitation tends to occur, thus reducing the propulsion and causing the engine to overheat. If the mounting height is too low, the water-resistance will increase and thereby reduce engine effi- ciency. Mount the engine so the anti-cavitation plate is about 130 mm (5 in.) above the bottom of the boat.

NOTE:

8The optimum mounting height of the outboard motor is affected by the boat/motor combination. Test runs at different heights can help determine the optimum mounting height.

For further details, consult your Yamaha dealer or boat manufacture to determine the proper mounting height.

8Refer to the section “TRIMMING OUT- BOARD MOTOR” for instructions on setting the trim angle of the outboard.

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