Installation Requirements; Boat Horsepower Rating; Mounting Motor; Propeller Selection - Yamaha F2.5A 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:
0.4 L (0.42 US qt, 0.35 Imp.qt)
Lubrication:
Splash
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
0.075 L (0.079 US qt, 0.066 Imp.qt)
Tightening torque for engine:
Spark plug:
25.0 Nm (2.55 kgf-m, 18.4 ft-lb)
Engine oil drain bolt:
18.0 Nm (1.84 kgf-m, 13.3 ft-lb)
Noise and vibration level:
Operator sound pressure level (ICOMIA
39/94 and 40/94):
80.9 dB(A)
Vibration on tiller handle (ICOMIA 38/94):
3.8 m/s²
EMU33554

Installation requirements

EMU33564

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 out-
board motor(s) does not exceed the boats
maximum horsepower rating. See the boat's
capacity plate or contact the manufacturer.
9
EMU33571

Mounting motor

EWM01570
WARNING
Improper mounting of the outboard mo-
G
tor could result in hazardous conditions
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.
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
19.
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