Specifications and requirements

Tightening torque for engine:

Spark plug:

25.0Nm (2.55 kgf-m, 18.4 ft-lb) Propeller nut:

17.0Nm (1.73 kgf-m, 12.5 ft-lb)

EMU33554

Installation requirements

EMU33563

Boat horsepower rating

EWM01560

WARNING

Overpowering a boat can cause severe in- stability.

Before installing the outboard motor(s), confirm that the total horsepower of your motor(s) does not exceed the boats maximum horsepower rating. See the boat’s capacity plate or contact the manufacturer.

EMU33571

Mounting motor

EWM01570

WARNING

●Improper mounting of the outboard mo- tor could result in hazardous conditions such as poor handling, loss of control, or fire hazards.

●Because the motor is very heavy, spe- cial equipment and training is required to mount it safely.

Your dealer or other person experienced in proper rigging should mount the motor using correct equipment and complete rigging in- structions. For further information, see page 23.

EMU25694

Battery requirements

EMU25730

Without a rectifier or Rectifier Regulator

ECM01090

NOTICE

A battery cannot be connected to models that do not have a rectifier or Rectifier Regulator.

If you wish to use a battery with the models without a rectifier or Rectifier Regulator, install an optional Rectifier Regulator.

Using a maintenance-free battery with the above models can shorten the life of the battery significantly.

Install an optional Rectifier Regulator or use accessories rated to withstand 18 volts or higher with the above models. Consult your Yamaha dealer for details on installing an optional Rectifier Regulator.

EMU34192

Propeller selection

Next to selecting an outboard, choosing the right propeller is one of the most important purchasing decisions a boater can make. The type, size, and design of your propeller have a direct impact on acceleration, top speed, fuel economy, and even engine life. Yamaha designs and manufactures propellers for every Yamaha outboard motor and every appli- cation.

Your outboard motor came with a Yamaha propeller chosen to perform well over a range of applications, but there may be uses where a different propeller would be more appropri- ate.

Your Yamaha dealer can help you select the right propeller for your boating needs. Select a propeller that will allow the engine to reach the middle or upper half of the operating range at full throttle with the maximum boat-

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