Section 1 - Getting to Know Your Power Package
Page 12 90-8M0113857 eng DECEMBER 2015
7. The Quicksilver MerCathode system has a 20‑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 - MerCathode
b - Red/purple wire
c - 20‑amp fuse
Audio Warning System
The 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
• Sterndrive oil level too low (if equipped with a drive reservoir having low oil level switch)
• Transmission temperature is too hot (if equipped)
NOTICE
A continuous horn indicates a critical fault. Operating the engine during a critical fault can damage components. If the
warning horn emits a continuous beep, do not operate the engine unless avoiding 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.
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