Single Engine Trim And Trailer; Dual Engine Trim And Trailer; Engine Electrical System Overload Protection; Fuses - MerCruiser Sterndrive TDI 3.0L User Manual

• Cause engine overheating if trimmed up (out) to a point where any cooling water intake holes are above the water line
Trimming the sterndrive down (in) can:
• Help the boat accelerate and plane off quicker
• Generally improve the ride in choppy water
• In most cases, reduce boat speed
• 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.

Single Engine Trim and Trailer

Single engine applications have a button that can be pressed to trim the sterndrive unit 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.

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.

Engine Electrical System Overload Protection

Fuses

Individual circuits are protected by fuses.
If an electrical overload occurs, a fuse will burn out. Find and correct the cause for the electrical overload before replacing the
fuse.
Failure to protect wiring with an appropriate fuse can damage the wiring and start a fire. When installing any accessories, we
recommend using a Mercury accessory kit. Always use the appropriate fuse to protect wiring.
Fuses are located behind the electrical control unit cover and instrument panel cover.
90-8M0070851 AUGUST 2012
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Section 2 - Getting to Know Your Power Package
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