Mercury 2.8 Diesel, Operation & Maintenance Manual

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Section 1 - Getting to Know Your Power Package
Page 14 90-8M0113987
eng
DECEMBER 2015
1. The power trim system is protected from overload by a 110‑amp fuse and a 20‑amp in‑line fuse on the power trim pump.
a - 20‑amp in‑line fuse holder
b - 110‑amp fuse
2. The MerCathode system has a fuse connected to the positive (+) terminal on the controller. If the fuse is open (blown), the
system will not operate, resulting in a loss of corrosion protection. Replace the fuse with one of the same amp rating.
a - MerCathode
b - Red/purple wire
c - Fuse
Engine Guardian System
The Engine Guardian system monitors the critical sensors on the engine for any early indications of problems. Engine Guardian
is functional whenever your engine is operating, so you never have to be concerned about whether or not you are protected.
The system will respond to a problem by sounding the warning horn for six seconds and/or reducing engine power in order to
provide engine protection.
If Engine Guardian has been activated, reduce the engine speed. The problem will need to be identified and corrected. The
system must be reset before the engine will operate at higher speeds. Moving the throttle lever back to the idle position will
reset the Engine Guardian system. If the Engine Guardian system has determined the reset has not corrected the problem,
Engine Guardian will remain activated, limiting the throttle. The problem must be identified and corrected before Engine
Guardian will allow the engine to reach a normal operating RPM.
SeaCore Equipped Drives
SeaCore Components and Castings
Mercury MerCruiser SeaCore power packages are equipped with additional stainless steel components and particular
aluminum castings with special coatings. Do not replace SeaCore components with non‑SeaCore. Use only the specified
Mercury MerCruiser SeaCore components and castings on these power packages.
Stainless Steel Fasteners
SeaCore models are equipped with additional stainless steel fasteners to maximize corrosion resistance in saltwater
environments.
a
b
9208
a
c
50534
b