Trailering Outboard; Tilting Outboard Up And Down Manually; Trim "In" Angle Adjustment - Mercury 45 Jet 50-55 Service Manual

Operating "Down" circuit will actuate the "down" relay
(located under engine cowl) and close the electric
motor circuit (motor will run in opposite direction of the
"Up" circuit). The electric motor will drive the pump,
forcing fluid thru internal passageways into the
"down" side of the tilt ram. The tilt ram will move the
engine down to the desired angle.

Trailering Outboard

WARNING
Excessive engine trim angle will result in insuffi-
cient 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.
While operating "up" circuit, the ram will continue to
tilt outboard to full up position for trailering.
Tilting Outboard Up and Down
Manually
WARNING
Before opening the manual release valve, make
sure all persons are clear of engine as engine will
drop to full "down" position when valve is
opened.
With power trim installed, the outboard can be raised
or lowered manually by opening the manual release
valve 3 turns maximum (counterclockwise).
a - Manual Release Valve
5D-2 - MID-SECTION

Trim "In" Angle Adjustment

Operating some boats with engine trimmed to the
full "in" trim angle [not using trim adjustment bolt
(a)] at planing speed will cause undesirable and/
or unsafe steering conditions. Each boat must be
water tested for handling characteristics after en-
gine installation and after any trim adjustments.
IMPORTANT: Some boat/motor combinations,
that do not use the trim adjustment bolt (a) and
are trimmed to the full "in" trim angle, will not ex-
perience any undesirable and/or unsafe steering
conditions during planing speed. Thus, not using
trim adjustment bolt may be desired. However,
some boats with engine trimmed to the full "in"
trim angle at planing speed will cause undesir-
able and/or unsafe steering conditions. If these
steering conditions are experienced, under no
circumstances should the engine be operated
without the trim adjustment bolt and without the
bolt adjusted in the proper holes to prevent un-
safe handling characteristics.
Water test the boat not using the trim adjustment bolt.
If undesirable and/or unsafe steering conditions are
experienced (boat runs with nose down), install trim
adjustment bolt in proper hole to prevent unsafe han-
dling characteristics.
a
a - Trim Adjustment Bolt
52028
WARNING
a
90-817643R1 DECEMBER 1996
52029