Yamaha F75B Owner's Manual page 42

Installation
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 air-
borne water spray while the boat is
cruising. If the motor is operated contin-
uously in the presence of airborne water
spray, enough water could enter the en-
gine through the intake opening on the
cowling to cause severe engine dam-
age. Eliminate the cause of the airborne
water spray.
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