Installation
38
EMU26903
Installation
The information presented in this section is
intended as reference only. It is not possible
to provide complete instructions for every
possible boat and motor combination. Proper
mounting depends in part on experience and
the specific boat and motor combination.
EWM01591
Overpowering a boat could cause se-
vere instability. Do not install an out-
board motor with more horsepower
than the maximum rating on the capaci-
ty plate of the boat. If the boat does not
have a capacity plate, consult the boat
manufacturer.
Improper mounting of the outboard mo-
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.
EMU35812
Mounting the outboard 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.
For twin engine boats, mount the outboard
motors equidistant from the centerline.
For triple engine boats, mount the center out-
board motor on the centerline (keel line), and
the port side and starboard side outboard
motors equidistant from the center outboard
motor.
Consult your Yamaha dealer or boat manu-
facturer for further information on determin-
ing the proper mounting location.
EMU26937
Mounting height (boat bottom)
The mounting height of your outboard motor
affects its efficiency and reliability. If it is
mounted too high, propeller ventilation may
occur, which will reduce propulsion due to
excessive propeller slip, and the water in-
takes for the cooling system may not get an
adequate water supply, which can cause en-
1. Center line (keel line)
1. Center line (keel line)
1. Center line (keel line)
1
1
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