Installation Requirements; Boat Horsepower Rating; Mounting Motor; Propeller Selection - Yamaha F4 Owner's Manual

Basic requirements
ECM01050
CAUTION:
All 4-stroke engines are shipped from the
factory without engine oil.
EMU33552

Installation requirements

EMU33560

Boat horsepower rating

Before installing the outboard motor(s), con-
firm that the total horsepower of your mo-
tor(s) does not exceed the boats maximum
horsepower rating. See the boats capacity
plate or contact the manufacturer.
EWM01560
WARNING
Overpowering a boat can cause severe
15
instability.
EMU33570

Mounting motor

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
24.
EWM01570
WARNING
Improper mounting of the outboard mo-
G
tor could result in hazardous condi-
tions such as poor handling, loss of
control, or fire hazards.
Because the motor is very heavy, spe-
G
cial equipment and training is required
to mount it safely.
EMU34190

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 propel-
lers for every Yamaha outboard motor and
every application.
Your outboard motor came with a Yamaha
ZMU01710
propeller chosen to perform well over a
range of applications, but there may be uses
where a different propeller would be more
appropriate.
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-
load. Generally, chose a larger pitch propel-
ler for a smaller operating load and a smaller
pitch propeller for a heavier load. If you carry