Mercury 75 Service Manual page 365

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.
90-830234R3 DECEMBER 1997 MID-SECTION - 5C-5