Electrical System Overload Protection - Mercury HP 500 EFI Bravo XR/XZ/III User Manual

Electrical System Overload Protection

If an electrical overload occurs, a fuse will blow or the circuit breaker
will trip open. The cause must be found and corrected before replac-
ing fuse or resetting circuit breaker.
1 A circuit breaker provides protection for engine wiring harness
and instrumentation power lead. Reset by pushing RESET but-
ton IN.
In an emergency, when engine must be operated and cause for high
current draw cannot be located and corrected, perform the following:
•
Turn OFF or disconnect all accessories connected to engine and
instrumentation wiring.
•
Reset circuit breaker.
•
If breaker remains open, electrical overload has not been elimi-
nated.
•
Further checks must be made on electrical system.
2 A 20 amp fuse may be located in ignition switch "I" terminal lead
to protect electrical system. Check for blown fuse if key is turned
to START and nothing happens (and circuit breaker is not
tripped).
3 The Power Trim System is protected from overload by 110 amp
fuse and a 20 amp in-line fuse on Power Trim pump.
NOTE: Dual Power Trim Control Models-Refer to wiring diagrams
for fuse location.
4 The Quicksilver MerCathode System has a 20 amp in-line fuse
in the wire which connects to positive (+) terminal on controller.
If fuse is blown, system will not operate and a loss of corrosion
protection will result.
5 A 90 amp. fuse is located on the starter.
6 Three fuses are located at the upper rear of the engine.
•
15 amp. = Fuel Pump
•
15 amp. = Electronic Control Module (ECM), Data Link Con-
nector (DLC) / Battery
•
10 amp. = ECM / Ignition / Injectors / Battery
500 EFI Bravo
OPERATION
45