Mercury 3.0 MPI ECT Operation & Maintenance Manual page 22

Section 1 - Getting to Know Your Power Package
A 20‑amp fuse may be located in the ignition switch "I" terminal lead to protect the electrical system. Check for an open fuse or
open circuit breaker if the ignition key is turned to the start position and nothing happens.
The power trim system is protected from overload by a 110‑amp fuse and a 20‑amp spade fuse on the power trim pump. The
trim pump may also have an in‑line circuit protection device in the power trim positive lead near the battery switch or battery
connection.
a
The MerCathode system has a 5‑amp fuse which connects to the positive (+) terminal on the controller. If the fuse is open, the
system will not operate, resulting in a loss of corrosion protection.
a
c
b
Page 14
Ignition switch fuse—typical
b
a - MerCathode
b - Red/purple wire
c - 5‑amp fuse
50534
mc70525-1
Power trim fuses
a - 20‑amp spade fuse
b - 110‑amp fuse
9208
90-8M0113856 DECEMBER 2015
eng