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Mercury 3.0 MPI ECT - Page 18

Mercury 3.0 MPI ECT
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Section 1 - Getting to Know Your Power Package
Page 10 90-8M0113856 eng DECEMBER 2015
Four fuses protect the main power, fuel pump, ignition, and accessory circuits. Two 10‑amp fuses protect the O
2
sensors.
These fuses are located on the top of the engine, underneath the engine information plate.
Fuse locations
a - O
2
sensor fuses
b - Main power, fuel pump, ignition, and accessory fuses
a - Fuel pump relay, IAC, ignition coil (20 amp)
b - Fuel injectors, distributor (20 amp)
c - Spare (15 amp)
d - Main power relay, alternator (20 amp)
e - Helm power (15 amp)
f - O
2
sensor (10 amp)
g - Spare (10 amp)
A 90‑amp fuse, located on the large post of the starter solenoid, protects the engine wiring harness if an electrical overload
occurs.
mc74907-1
Engine wiring harness fuse
a
b
32638
a
b
c
d
e
f
g
57136

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