Electrical System Overload Protection - Mercury 1.7 MI Manual

SECTION 2
CE477

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 replacing the fuse or resetting the circuit breaker.
NOTE: In an emergency, when the engine must be operated and the cause for the high
current draw cannot be located and corrected, turn OFF or disconnect all accessories
connected to the engine and instrumentation wiring. Reset the circuit breaker. If the breaker
remains open, the electrical overload has not been eliminated. Further checks must be
made on the electrical system. Contact your authorized Cummins MerCruiser Diesel dealer
/ distributor.
1. One 50 amp circuit breaker provide protection for engine wiring harness and
instrumentation power lead. Reset by pushing RESET button IN.
2. A 20 amp fuse located in-line on key switch power supply wire protects the
instrumentation and wiring should an electrical overload occur. If an overload occurs,
the fuse will burn out. Check for blown (burned) fuse if key is turned to RUN or START
and instruments or switches, or both, do not function and a circuit breaker is not tripped.
CMD-3967823 / 90-865237030 OCTOBER 2003
INDEX
a
a - Electrical bracket
b - Circuit breaker
a - Fuse holder
GETTING TO KNOW YOUR POWER PACKAGE
b
79111
a
77421
Page 17