Section 2 - Getting to Know Your Power Package
90-8M0074352
eng
OCTOBER 2012
Page 33
•
If in excess, lower the bow of some boats to a point at which they begin to plow with their bow in the water while on plane.
This can result in an unexpected turn in either direction called bow steering or over steering if any turn is attempted or if a
significant wave is encountered.
mc79530
Single Engine Trim/Trailer
Single engine applications will have a button that can be pressed to trim the sterndrive unit up or down.
To raise the sterndrive unit for trailering, beaching, launching, low speed (below 1200 RPM), and shallow water operation push
the trim button to raise the sterndrive unit to the full up/out position.
Some controls also have a trailer button that trims the sterndrive to a position suitable for trailer purposes only.
NOTE: The DTS control system limits the extent to which the sterndrive unit can be trimmed up/out when engine speed is
above 3500 RPM.
Dual Engine Trim/Trailer
NOTICE
If using external tie bars, raising or lowering the drives independently of each other can damage the drive and steering
systems. If using an external tie bar, raise and lower all drives together as a unit.
Dual engine applications may have a single integral button to operate both sterndrive units simultaneously or may have
separate buttons for each sterndrive unit.
Some controls also have a trailer button that trims the sterndrives to a position suitable for trailer purposes only.
Trim without Key
Trim without key is a method of allowing trim operation after the ignition key switch is turned off. The command module and
PCM remain powered and are able to process trim requests for up to 15 minutes after the key switch is turned off. The
command module does not process any requests other than trim during this period. Once the 15 minute period expires, the
command module sends a command through the CAN lines to shut down the PCM. On multi‑engine applications, the timeout is
managed separately for each engine.
The trim without key period may be ended at any time by moving the control handle to wide‑open throttle reverse (WOTR) with
the key off. To end the 15 minute period for the center engine in a shadow mode application, ensure all ignition key switches
are in the "OFF" position and both remote control handles are in the wide‑open throttle reverse (WOTR) position.
Trim Delta
Trim delta controls the distance between the individual adjacent drive angles when trimming. The trim delta limit is preset, and
will not allow extreme drive angle differences that could damage tie bars. If the maximum trim delta limit is met, the drive
furthest in the trim process "up or down", will stop trimming until the adjacent drive is back within the delta limit. Once the drive
or drives are back within this delta window, the trim process will continue.
Electrical System Overload Protection
If an electrical overload occurs, a fuse will open or the circuit breaker will open. The cause must be found and corrected before
replacing the fuse or resetting the circuit breaker.
NOTE: In an emergency, when you must operate the engine and cannot locate the cause for the high current draw, turn off or
disconnect all accessories connected to the engine and instrumentation wiring. Reset the circuit breaker. If the breaker remains
open, the electrical overload has not been eliminated. Contact your authorized dealer as soon as possible.
