Mariner 100, Service Manual, Page: 10 / 391

90-13645--2 495 1-5 GENERAL INFORMATION AND SPECIFICATIONS
Checking Trim System Fluid Level
IMPORTANT: This trim system is pressurized.
Remove fill screw (b) when outboard is trimmed
to the full “up” position. Retighten fill screw
securely.
1. Trim outboard to full “up” position. Engage tilt lock
lever. Trim system fluid can only be checked when
outboard is in this position.
2. Remove fill screw and check fluid level. Fluid level
should be visible in fill tube.
3. If necessary, add Quicksilver Power Trim and
Steering Fluid; or Automatic Transmission Fluid
(ATF) Type F, FA or Dextron II.
20319
a
b
a - Tilt Lock Lever
b - Fill Screw
Tilt Angle Adjustment
MODELS WITHOUT POWER TRIM
WARNING
Operating some boats at minimum trim “In” at
planing speeds will cause undesirable and/or
unsafe steering conditions. Each boat should be
tested for handling characteristics after any
adjustment is made to the tilt angle.
DO NOT OPERATE motor with tilt lock pin removed.
Adjust tilt angle of motor on transom with tilt lock pin
so that anti-ventilation plate is about parallel and even
with bottom of boat. Speed sometimes may be im-
proved by tilting motor out one tilt pin hole to raise bow
and reduce wetted surface. If motor is tilted in, boat
will ride bow down, wetting more of the bottom and re-
ducing speed, which generally will improve operation
in rough water. Under ideal conditions, efficiency is
best with lower unit operating in level position. Opera-
tion with excessive tilt angle will reduce performance
noticeably and may induce ventilation. It is preferable
to level boat by proper loading rather than by extreme
adjustment of tilt angle.
22744
a
a - Tilt Lock Pin