Section 1 - Getting to Know Your Power Package
90-8M0113856
eng
DECEMBER 2015
Page 9
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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.
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.
Electrical System Overload Protection—3.0 MPI ECT
An electrical overload will either open a fuse or open a circuit breaker. You must find and repair the source of the overload
before replacing the fuse or resetting the circuit breaker.
NOTE: In an emergency, when you must operate the engine but cannot isolate 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, you have not eliminated the electrical overload and the electrical system requires further checks. Contact your authorized
Mercury MerCruiser dealer as soon as possible.
A circuit breaker protects the engine wiring harness and the instrumentation power lead. Reset the breaker by pushing the red
button.
51185
Engine wiring harness and instrumentation circuit breaker
