Trim Tabs; Power Trim Unit And Gauge - Sea Ray 250 Select EX Owner's Manual

S
ECTION
! CAUTION
Cockpit can fi ll with water if boat is moving forward,
when it is put into reverse.
Before shifting into reverse, shift to neutral, wait for
boat to stop moving forward, then shift into reverse.
B. T T
RIM ABS
The trim tabs are two fl at plates,
hinged below the water line on
the transom at the rear and are
raised and lowered hydraulically
by using the switches located on
the starboard switch panel at the
helm (see Fig. 2.5.2).
The trim tabs are used to adjust the sideways
listing of the boat due to uneven loading, a strong
cross wind or propeller torque. The twisting effect
of propeller torque is especially pronounced when
running the engine at high horsepower output. To
correct the listing, adjust the trim tabs to level the
boat. When the boat is level, right to left, the steering
effort will be the same for right and left turns.
Lower the trim tabs on the listing (lower) side by
pushing the top half of the trim tab switch in one-half
second bursts until the boat is righted.
Using both switches to lower both tabs on a side-
to-side balanced boat will lower the bow, when on
plane, if the rear of the boat is highly loaded. Again,
use only short bursts of the trim tab switches to
adjust the trim.
When running at cruising speed, the trim tabs should
be fully up, unless the rear is heavily loaded.
In heavy following seas or when running in an inlet,
best maneuverability is obtained with a bow high
attitude. To be sure the tabs are full up, push the
bottom halves of the switches for several seconds.
2.8
2 • G
ENERAL
B A
OAT RRANGEMENT
R
UNNING
A L
TTITUDE IST
BOW UP ......
BOW UP PORT
BOW UP STARBOARD
BOW DOWN PORT
BOW DOWN STARBOARD
T T
RIM ABS
(F . 2.8.1)
IG
TRIM TAB ROCKER
SWITCH
(AT CONTROL
STATION)
TRIM TAB PUMP
HYDRAULIC FLUID
RESERVOIR FILL
HYDRAULIC RAM
TRIM TAB
ZINC ANODE
C. P T U
OWER RIM NIT AND
The power trim allows the operator to raise and
lower the stern drive unit while underway to provide
the ideal boat angle (in relation to water surface) for
a given load and water condition (Fig. 2.9.1).
Trimming UP rotates the stern drive and propeller
away from the transom. Trimming DOWN rotates the
stern drive and propeller closer to the transom.
When the stern drive is trimmed DOWN, the bow
of the boat is being forced down. If the trim is in the
full DOWN position when accelerating from idle
to plane, the boat will plane faster with less bow
rise. Once on plane, the stern drive unit can be
trimmed UP slightly. This will raise the bow of the
boat slightly and increase speed. You will need to
try small differences in the stern drive position to
determine the trim position you prefer under various
conditions.
P
USH
TOP OF BOTH SWITCHES
TOP OF STARBOARD SWITCH
TOP OF PORT SWITCH
BOTTOM OF STARBOARD SWITCH
BOTTOM OF PORT SWITCH
HYDRAULIC RAM
ZINC ANODE
TRIM TAB
G
AUGE
250 Select EX