Yamaha F300A Owner's Manual page 52

Installation
engine overheating. If the engine is mounted
too low, water resistance (drag) will in-
crease, thereby reducing engine efficiency
and performance.
Most commonly, outboard motor should be
mounted so that the anti-cavitation plate is in
alignment with the bottom of the boat. The
optimum mounting height of the outboard
motor is affected by the boat/motor combina-
tion and the desired use. Test runs at differ-
ent heights can help determine the optimum
mounting height. Consult your Yamaha deal-
er or boat manufacturer for further informa-
tion on determining the proper mounting
height.
ECM01631
NOTICE
Check that the idle hole stays high
G
enough to keep out water getting inside
engine even if the boat is in stationary
with maximum load.
Incorrect engine height or obstructions
G
to the smooth flow of water (such as the
design or condition of the boat, or ac-
cessories such as transom ladders or
depth finder transducers) can create
airborne water spray while the boat is
cruising. If the motor is operated con-
tinuously in the presence of airborne
water spray, enough water could enter
the engine through the intake opening
45
on the cowling to cause severe engine
damage. Eliminate the cause of the air-
borne water spray.
ZMU01762