Electrical System Overload Protection; Mercathode System - Mercury D4.2L Manual

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CD495

Electrical System Overload Protection

lf an electrical overload occurs, a fuse will blow or a circuit breaker will trip open.
IMPORTANT: The cause must be found and corrected before replacing fuse or resetting circuit breaker.
1
Two 60 amp circuit breakers provide protection for engine wiring harness and instrumentation power lead.
Reset by pushing RESET button IN (on outside).
In an emergency, when engine must be operated and cause for high current draw cannot be located and cor-
rected, turn OFF or disconnect all accessories connected to engine and instrumentation wiring. Reset circuit
breaker. If breaker remains open, electrical overload has not been eliminated. Further checks must be made on
electrical system.
2
When equipped with Quicksilver instrumentation and wiring a 20 amp fuse and holder is located in-line on
key switch power supply wire and protects the Instrumentation and wiring should an electrical overload occur.
If an overload occurs, the fuse will burn out. Check "blown" (burned) fuse if key is turned to RUN or START and
instruments do not work and/or if switches do not function.
3
The Power Trim system is protected from overload by 110 amp fuse and a 20 amp in-line fuse on Power Trim
pump.
CA31

MerCathode System

4
A 20 amp in-line fuse is in the wire which connects to positive (+) terminal on controller. If fuse is "blown" (de-
fective), the system will not operate.
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73546
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