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Electrical System
Typical Yamaha Engine Charging Circuit ProtectionTypical Yamaha Electronic Steering Pump & Control Panel
Engine and Electronic Control Systems
Main Circuit Protection
Main Circuit Breakers
Boats with Yamaha Helm Master Electronic Steer-
ing systems are equipped with a heavy duty circuit
breaker for the engine steering pump in the aft
systems compartment that protects the steering
pump from an overload. Other heavy duty circuit
breakers near the battery switches protect the
engine charging circuits.
Circuit protection for other engines, controls, and
steering systems may be dierent. Refer to the
engine owner’s manual for information on circuit
protection and amperage requirements for the
engine and control system on your boat.
Main Fuses
On some engines, main power is distributed to
control system components through individual
heavy duty blade type fuses located near the bat-
tery switches. Refer to the engine owner’s manual
for information on circuit protection and amper-
age requirements for the engine and controls on
your boat.
AMP & Engine Main Circuit Breakers
If a main fuse blows, it must be replaced with a
fuse of the same size and amperage as the origi-
nal. The fuses are labeled and color coded. Never
try to correct a problem by installing a fuse with
a higher amperage rating. This could cause the
circuit with a problem to overheat, which could
result in an electrical re or permanent damage
to sensitive engine and control components.
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