Yamaha VX250A Owner's Manual page 42

q
104016
130mm ( 5 in.)
104025
Mount the outboard motor on the center line
(keel line) of the boat, and ensure that the
boat itself is well balanced. Otherwise, the
boat will be hard to steer. For boats without
a keel or which are asymmetrical, consult
your dealer.
1 Center line (keel line)
EMU01566
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 pos-
sible. 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 causing the engine to overheat. If the
mounting height is too low, the water-resis-
tance will increase and thereby reduce
engine efficiency. Mount the engine so the
anti-cavitation plate is about 130 mm (5 in.)
above the bottom of the boat.
NOTE:
8 The optimum mounting height of the out-
board motor is affected by the boat/motor
combination.
heights can help determine the optimum
mounting height.
For further details, consult your Yamaha
dealer or boat manufacture to determine
the proper mounting height.
8 Refer to the section "TRIMMING OUT-
BOARD MOTOR" for instructions on set-
ting the trim angle of the outboard.
3-3
Test runs at different
E