Installation Height - Honda BF4A Operation And Maintenance Ma

INSTALLATION

Installation Height

With the boat in the water, properly
loaded, and the engine stopped, check
the installed depth of the outboard
motor by looking at the
antiventilation plate.
BOAT
TRANSOM
HEIGHT
ANTIVENTILATION PLATE
The antiventilation plate of the
outboard motor should be
0 – 50 mm (0 – 2 in) below the
bottom of the boat.
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The correct dimensions differ
according to the type of the boats and
the configuration of the bottom of the
boats. Follow the manufacture's
recommended installation height.
If the outboard motor is installed too
low, the boat will squat and be hard to
plane, and the engine will spray water
that may enter the boat. It will tend to
porpoise, and high-speed stability
will be reduced.
If the outboard motor is installed too
high, that will cause propeller
0 – 50 mm
ventilation.
(0 – 2 in)
The water level must be at least 100
mm (4 in) above the antiventilation
plate with the engine not running,
otherwise the water pump may not
receive sufficient cooling water, and
the engine will overheat.