Yamaha F80B Owner's Manual page 48

Installation
depth finder transducers) can create air-
borne water spray while the boat is
cruising. If the outboard motor is operat-
ed continuously in the presence of air-
borne water spray, enough water could
enter the engine through the air intake
opening in the top cowling to cause se-
vere engine damage. Remove the cause
of the airborne water spray.
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