Mariner 100, Руководство по обслуживанию, Страница: 307 / 391

6C-1 90-13645--2 495 POWER-TRIM
Special Tools
Part No. Description
91-63209 Torch Lamp
91-74951 Spanner Wrench
91-99750 Multi-Meter DVA Tester
Quicksilver Lubricants and
Service Aids
Part No. Description
91-90100A12 Power Trim and Steering Fluid
Obtain Locally Loctite 271
91-25711-1 Liquid Neoprene
91-78376A6 Anti-Corrosion Grease
Power Trim - General
Information
Description
The Power Trim system consists of an electric motor,
pressurized fluid reservoir, pump and trim cylinder.
The remote control (or trim panel) is equipped with a
switch that is used for trimming the outboard “up” and
“down”, and for tilting the outboard for shallow water
operation (at slow speed) or for “trailering”. The out-
board can be trimmed “up” or “down” while engine is
under power or when engine is not running.
Trimming Characteristics
When trimming outboard from a mid-trim position
(trim tab in neutral, straight fore-and-aft position), you
can expect the following results:
TRIMMING OUTBOARD “UP” (“OUT”)
WARNING
Excessive trim “out” may reduce the stability of
some high speed hulls. To correct instability at
high speed, reduce the power gradually and trim
the motor “In” slightly before resuming high
speed operation. (Rapid reduction in power will
cause a sudden change of steering torque and
may cause additional momentary boat instability.)
Will lift bow of boat, usually increasing top speed.
Transfers steering torque harder to port (left) on in-
stallations below 23 in. transom height.
Increases clearance over submerged objects.
In excess, can cause “porpoising” and/or ventilation.
In excess, can cause insufficient water supply to wa-
ter pump resulting in serious water pump and/or pow-
erhead overheating damage.
WARNING
Excessive engine trim angle will result in
insufficient water supply to water pump causing
water pump and/or powerhead overheating
damage. Make sure that water level is above gear
housing water intake holes whenever engine is
running.
Operating “Up” circuit will actuate the “up” relay (lo-
cated under engine cowl) and close the electric motor
circuit. The electric motor drives the pump, forcing
fluid thru internal passageways into the “up” side of
the trim cylinder.
The trim cylinder/trim ram will position the engine at
the desired trim angle within the 20
°
maximum trim
range. The Power Trim system is designed so the en-
gine cannot be trimmed beyond the 20
°
maximum
trim angle as long as engine RPM is above approxi-
mately 2000 RPM.
The engine can be raised beyond the 20
°
maximum
trim angle for shallow water operation, etc., by keep-
ing the engine RPM below 2000 RPM. If engine RPM
increases above 2000 RPM, the thrust created by the
propeller (if deep enough in the water) will cause the
trim system to automatically lower the engine back to
the 20
°
maximum trim angle.
TRIMMING OUTBOARD “DOWN” (“IN”)
WARNING
Excessive speed at minimum trim “In” may cause
undesirable and/or unsafe steering conditions.
Each boat should be tested for handling
characteristics after any adjustment is made to
the tilt angle (tilt bolt relocation).
Will help planing off, particularly with a heavy load.
Usually improves ride in choppy water.
In excess, can cause boat to veer to the left or right
(bow steer).
Transfers steering torque harder to right (or less to the
left).