Mercury MerCruiser Series, Manual

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NOTE: In an emergency, when you must operate the engine and cannot locate or correct the cause for the electrical overload
(high current draw), turn off or disconnect all the accessories connected to the engine and instrumentation wiring. Reset the
circuit breaker or replace the fuse. If the circuit remains open, the electrical overload has not been eliminated. Contact your
Mercury Diesel authorized repair facility to check the electrical system.
Circuit breakers and fuses provide protection for the electrical system as indicated. The circuit breakers and fuses are located
in various locations throughout the boat. Some circuits may be protected by circuit breakers or fuses installed by the boat
manufacturer and can vary in appearance and location. Ask your dealer for the location and operation instructions of all
overload protection devices.
After finding and correcting the cause of the overload, reset the circuit breaker by pressing the reset button.
The engine protection fuses are located on the port side of the engine. To access the fuses, remove the fuse box cover, and
disengage the fuse holders from the electrical plate assembly.
a - Fuse box cover
b - 25 amp electronic diesel control (EDC) power
c - 15 amp for optional fuel priming pump
d - 5 amp key switch
e - 5 amp wake to key 12‑pin
f - 5 amp diagnostic connector (EOBD)
g - 25 amp starter relay
Vessel Interface Panel (VIP) Overload Protection
The vessel interface panel (VIP) contains five circuit breakers that help protect the transmission harness, engine harness,
vessel sensor harness, and helm harness.
NOTE: A VIP for each engine is located in the engine room.
a - Main circuit breaker (25 amp)
b - VIP diagnostics circuit breaker (10 amp)
c - Helm circuit breaker (10 amp)
d - SIM/vessel circuit breaker (10 amp)
e - Gear circuit breaker (15 amp)
Overload Protection for the DC Voltage Regulator System, If Equipped
If the vessel is equipped with a 24‑volt system, a DC voltage regulator is required to supply 12‑volt power to the VIP and the
other 12‑volt circuits. A protective fuse is provided for the 24‑volt DC to 12‑volt DC voltage regulator system, if equipped. The
spade‑style, in‑line fuse is located in the harness between the voltage regulator and the 24‑volt battery system. The fuse
protects the wiring and the regulator against overloads.
a
b
c
d
e
f
g
65109
a
b
e
c
d
65506
Section 2 - Getting to Know Your Power Package
90-8M0117076
eng
FEBRUARY 2018 Page 23