Power Trim/Trim Tabs; Operation In “Bow Up” - Regal LS4 Owner's Manual

Power Trim/Trim Tabs

sender unit that reads the drive angle and sends
information to the chart plotter showing a reading.
Purpose of Power Trim
The purpose of the power trim/tilt is to enable the
operator to change the angle of the drive while at the
helm. Changing the angle of the drive or "trimming"
provides the following benefi ts:
l. Improves acceleration onto a plane.
2. Maintains boat on plane at reduced throttle
settings.
3. Increases fuel economy.
4. Provides smoother ride in choppy water.
5. Increases top speed.
In short, it is a way of fi ne-tuning the performance
of your boat and will enable you to get the most
effi cient and comfortable ride possible, whatever
the conditions.
Using Power Trim
The power trim is normally used prior to accelerating
onto a plane, after reaching the desired RPM or
boat speed and when there is a change in water or
boating conditions.
Stern drive boats have
the ability to angle in
or out their drive unit in
relationship to the transom.
This is accomplished by
hydraulic shocks located
on the lower unit housing
along with an electrical
Position passengers and equipment in the boat so
that the weight is balanced correctly fore and aft as
well as side to side. Trimming will not compensate
for an unbalanced load.
To operate the trim, push the switch until the desired
bow position is reached. The trim may be operated
at any boat speed or at rest. Avoid operating the trim
system when running in reverse. Observe the trim/
tilt gauge which indicates the boat's bow position
achieved by the trim angle of the vertical drive unit.
"Bow-Up" corresponds to the upper portion of
the trim range on the gauge while "Bow Down"
corresponds to the lower portion of the trim range
on the gauge.
To determine the proper trim angle, experiment a
little until you are familiar with the changes in your
boat. The vessel will be properly trimmed when the
trim angle provides the best boat performance for
the particular operating conditions. A trim position
that provides a balanced steering load is desirable.
To familiarize yourself with the power trim, make test
runs at slower speeds and at various trim positions
to see the effect of trimming. Note the time it takes
for the boat to plane. View the chart plotter screen,
tachometer and speedometer readings as well as
the ride action of the boat.
Operation In "Bow Up"
The "Bow Up" or out position is normally used for
cruising, running with a choppy wave condition, or
running at full speed. Excessive "bow up" trim will
cause propeller ventilation resulting in propeller
slippage. Use caution when operating in rough
water or crossing another boat's wake.
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