Yamaha 25B Manual Del Propietário página 64

q
0~25mm
(0~1in.)
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)
104011
EMU01298
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
engine to overheat. If the mounting-height is
too low, the water-resistance will increase
and thereby reduce engine efficiency. Mount
the engine so that the anti-cavitation plate is
between the bottom of the boat and a level
25 mm (1 in.) below it.
NOTE:
8 The optimum mounting height of the out-
board motor is affected by the boat/motor
104013
combination and the desired use. Test
runs at different heights can help deter-
mine the optimum mounting height.
8 Refer to the section "TRIMMING OUT-
BOARD MOTOR" for instructions on set-
ting the trim angle of the outboard.
3-3
GB