Section 2 - Getting to Know Your Power Package
Page 30 90-865253073 DECEMBER 2007
A power harness, connected to the engine starting battery, minimizes voltage drop to the
electrical system. This harness is protected by a 5 amp fuse. This connection is located at
the rear of the engine, near the 14‑pin connector.
A 20 amp fuse may be located in the ignition switch "I" terminal lead to protect the electrical
system. Check for a failed fuse if the ignition key is turned to the "START" position and
nothing happens, and the circuit breaker is not tripped.
mc70525-1
Audio Warning System
IMPORTANT: The audio warning system alerts the operator that a problem has occurred.
It does not protect the engine from damage.
Your Mercury MerCruiser power package may be equipped with an audio warning system.
Most faults cause the warning horn circuit to activate. How the warning horn activates
depends on the severity of the problem.
There are three warning horn states:
• Caution
• Severe
• Onboard Diagnostic Marine (OBDM) fault
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