Audio Warning System; Testing The Audio Warning System - Mercury Inboard 5.7L Manual

4. A 20 amp fuse is located near the TKS module on the carburetor. This fuse provides
protection to the wiring of the TKS module if an electrical overload occurs.

Audio Warning System

Your Mercury MerCruiser power package may be equipped with an Audio Warning System.
The Audio Warning System will not protect the engine from damage. It is designed to warn
the operator that a problem has occurred.
The audio warning system will sound with a continuous horn if one of the following occurs:
• Engine oil pressure too low
• Engine temperature too hot
• Seawater pressure too low
The audio warning system will sound with an intermittent beeping if the following occurs:
• Transmission fluid temperature too hot
Operation of the engine after the audio warning system alarm has sounded could result
in damage to the power package. Do not operate engine once the alarm has sounded
except to avoid a hazardous situation.
If the alarm sounds, stop the engine immediately. Investigate cause and correct it, if
possible. If the cause cannot be determined, contact your authorized Mercury MerCruiser
dealer.

Testing The Audio Warning System

1. Turn the ignition switch to the "ON" position without cranking the engine.
2. Listen for the audio alarm. The alarm will sound if the system is functioning correctly.
90-860174050 JUNE 2005
Getting to Know Your Power Package
11822
CAUTION
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