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If excessively trimmed down (in), may lower the bows 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.
Single-Engine Trim and Trailer
Single‑engine applications have a button that can be pressed to trim the sterndrive up (out) or down (in).
To raise the sterndrive for trailering, beaching, launching, low‑speed (below 1200 RPM), and shallow water operation, push the
trim button to raise the sterndrive 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 Engine Control Module (ECM) limits the extent to which the sterndrive can be trimmed up (out) when engine speed
is above 1200 RPM.
Dual-Engine Trim and Trailer
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 sterndrives simultaneously or may have separate
buttons for each sterndrive.
Some controls also have a trailer button that trims the sterndrives to a position suitable for trailer purposes only.
Trim without Key
The Trim Without Key mode allows trim operation after the ignition key switch is turned off. To avoid injury or product
damage, do not attempt any engine‑ or sterndrive‑related repairs or maintenance until performing the Wide Open Throttle
Reverse operation to end the Trim Without Key mode.
Trim without key allows trim operation for up to 15 minutes after the ignition key switch is turned off. On multi‑engine
applications, the trim without key time 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 with the
key off.
Overload Protection—Upper Engine Circuit Breaker Panel
If an electrical overload occurs, a fuse will burn out (blow) or a circuit breaker will trip open. Find and correct the cause for the
electrical overload before replacing the fuse or resetting the circuit breaker.
NOTE: In an emergency, when the engine must be operated and the cause for the high current draw cannot be located and
corrected, turn off or disconnect all the accessories connected to the engine and instrumentation wiring. Reset the circuit
breaker. If the breaker remains open, the electrical overload has not been eliminated. Further checks must be made on the
electrical system. Contact your Mercury Diesel authorized repair facility.
90-8M0113987
DECEMBER 2015
eng
Section 1 - Getting to Know Your Power Package
NOTICE
CAUTION
!
mc79530
Page 11
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