Mariner 100, Service Manual, Page: 9 / 391

1-4 90-13645--2 495 GENERAL INFORMATION AND SPECIFICATIONS
Power Trim System
GENERAL INFORMATION
The power trim system is filled at the manufacturer
and is ready for use.
Trim outboard through entire trailering range several
times to remove any air from the system.
The trim system is pressurized and is not externally
vented. The outboard can be raised or lowered manu-
ally by loosening the manual release valve four turns.
The trim “out” angle of this outboard is not adjustable.
The trim system has an internal valve which will
automatically stop the outward trim travel at 20
when
engine RPM is approximately 2000 RPM or higher;
outboard also has to be in water and in gear.
The outboard can be operated beyond the 20 trim
limit for operating outboard in shallow water if engine
RPM is kept below approximately 2000 RPM.
a
b
23321
a - Fill Screw (System is Pressurized, DO NOT Open Unless
Outboard is Tilted to Full Up Position)
b - Manual Release Valve
Trim “In” Angle Adjustment
MODELS WITH POWER TRIM
WARNING
Operating some boats with outboard 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
outboard installation and after any trim adjust-
ments.
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 experi-
ence any undesirable and/or unsafe steering
conditions during planing speed. Thus, not using
trim adjustment bolt may be desired. However,
some boats with outboard trimmed to the full “in”
trim angle at planing speeds will cause undesir-
able and/or unsafe steering conditions. If these
steering conditions are experienced, under no
circumstances should the outboard 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.
22744
a