Operation; Installation; Mounting The Outboard Motor - Yamaha F6A Owner's Manual

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Installation

The information presented in this section is in-
tended as reference only. It is not possible to
provide complete instructions for every possi-
ble boat and motor combination. Proper
mounting depends in part on experience and
the specific boat and motor combination.
EWM01590
WARNING
Overpowering a boat could cause se-
G
vere instability. Do not install an out-
board motor with more horsepower than
the maximum rating on the capacity
plate of the boat. If the boat does not
have a capacity plate, consult the boat
manufacturer.
Improper mounting of the outboard mo-
G
tor could result in hazardous conditions
such as poor handling, loss of control,
or fire hazards. For permanently mount-
ed models, your dealer or other person
experienced in proper rigging should
mount the motor.
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Mounting the outboard motor

EWM01720
WARNING
Your dealer or other person experienced
in proper outboard motor mounting
should show you how to mount your out-
board motor.
The outboard motor should be mounted so
that the boat is well balanced. Otherwise, the
boat could be hard to steer. For single-engine
boats, mount the outboard motor on the cen-
terline (keel line) of the boat.
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 out-
board motor must be made as little as possi-
ble. 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 if the propeller tips cut the air, the engine
speed will rise abnormally and cause the en-
gine to overheat. If the mounting height is too
low, the water resistance will increase and
thereby reduce engine efficiency. Mount the
outboard motor so that the anti-cavitation
plate is between the bottom of the boat and a
level 25 mm (1 in.) below it.
0–25mm
(0–1in.)

Operation

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