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

Specifications and requirements
Recommended engine oil group 1*:
SAE 10W-30/10W-40/5W-30
API SE/SF/SG/SH/SJ/SL
Recommended engine oil group 2*:
SAE 15W-40/20W-40/20W-50
API SH/SJ/SL
Engine oil quantity:
0.6 L (0.63 US qt, 0.53 Imp.qt)
Lubrication:
Wet sump
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
0.100 L (0.106 US qt, 0.088 Imp.qt)
Tightening torque for engine:
Spark plug:
13.0 Nm (1.33 kgf-m, 9.6 ft-lb)
Engine oil drain bolt:
18.0 Nm (1.84 kgf-m, 13.3 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), con-
firm that the total horsepower of your motor(s)
does not exceed the boats maximum horse-
power rating. See the boat's capacity plate or
contact the manufacturer.
EMU40170

Mounting the outboard motor

EWM02430
WARNING
Improper mounting of the outboard motor
could result in hazardous conditions,
such as poor handling, loss of control, or
fire hazards. If you are not able to mount
the outboard motor properly, consult a
Yamaha dealer.
13
To lift and mount the outboard motor, two
people are necessary. For further information,
see page 26.
EMU34194

Propeller selection

Next to selecting an outboard motor, selecting
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 ev-
ery Yamaha outboard motor and every appli-
cation.
Your outboard motor came with a Yamaha
propeller selected to perform well over a
range of applications, but there may be uses
where a different propeller would be more ap-
propriate.
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, select a larger pitch propeller
for a smaller operating load and a smaller
pitch propeller for a heavier load. If you carry
loads that vary widely, select the propeller that
lets the engine run in the proper range for your
maximum load but remember that you may
need to reduce your throttle setting to stay
within the recommended engine speed range
when carrying lighter loads.
To check the propeller, see page 61.