Conditions Affecting Operation; Trim And Weight Distribution; Boat Bottom - PCM HO303 MPI Owner's Operation And Maintenance Manual

TRIM AND WEIGHT DISTRIBUTION

Trimming of the boat and positioning of the weight (gear
and passengers) inside the boat has the following effects
on handling:
• Trimming the bow up or shifting weight to the
stern (rear).
− Normally used for cruising (running) with a
choppy wave condition (following sea) for
running at full speed.
− Will generally increase speed and engine
RPM.
− Will cause the bow to bounce in rough water.
− In extreme, may cause the boat to porpoise.
− When coming off plane, it increases the
chances of following wave splashing into the
stern of the boat.
• Trimming the bow down or shifting the weight to
the bow (front).
− Normally used for cruising (running) against
a choppy wave condition, acceleration onto
plane and operating at slow planing speeds.
− Will improve rough water ride and handling.
− In extreme, may cause the boat to bow steer
(veer back and forth with little control).

CONDITIONS AFFECTING OPERATION - 6

BOAT BOTTOM

To ensure maximum engine performance, fuel economy
and boat speed, the bottom of your boat must be kept
clean and free of marine growth and barnacles. Marine
vegetation may accumulate when the boat is docked
and should be removed before operation. If the boat
is docked for long periods of time, the water inlets may
become clogged with growth and will cause the engine
to overheat.
In most areas, it is advisable to coat the boat bottom with
antifouling paint to prevent the build-up of marine growth.
Contact your dealer for advice on these requirements in
your area.
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