MerCruiser 496 MAG Owner's Manual page 39

A 20 amp fuse may be located in the ignition switch "I" terminal lead to protect the electrical system. Check for an open fuse if the
engine does not start, and the circuit breaker is not tripped.
The power trim system is protected from overload by both 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 clean power harness connected to the engine starting battery minimizes voltage drop to the electrical system and is protected
by a 5 amp fuse.
90-899883274 MARCH 2008
b
Section 2 - Getting to Know Your Power Package
mc70525-1
a - 20 amp spade fuse
b - 110 amp fuse
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