MerCruiser 3.0 MPI Owner's Manual page 37

In the ignition switch "I" terminal lead, there may be a 20 amp fuse that protects the electrical
system. Check for a failed fuse if you turn the ignition key to the "START" position and
nothing happens, assuming the circuit breaker is not tripped.
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.
90-899883272 MARCH 2008
a
b
a - 20 amp spade fuse
b - 110 amp fuse
Section 2 - Getting to Know Your Power Package
mc70525-1
9208
Page 29