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Electrical System
Typical Yamaha Engine Charging Circuit Protection
Yamaha Electronic Steering Pump & Control Panel
Main Fuses
On some engines, main power is distributed to
control system components through individual
heavy duty blade type fuses located near the
battery switches. Refer to the engine owner’s
manual for information on circuit protection and
amperage requirements for the engines and con-
trols on your boat.
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.
6.8 36 Volt Trolling Motor System
If your boat is equipped with the optional trolling
motor, it will also be equipped with a 36 volt DC
electrical system that provides power to the troll-
ing motor. The 36 volt system consists of three 12
volt, deep cycle batteries wired in series, a three
bank DC battery charger and circuit protection. A
heavy duty outlet plug with a protective cover is
installed near the bow that provides the connec-
tion for the trolling motor. The system is com-
pletely isolated from the boat 12 volt engine and
accessory circuits. A heavy duty circuit breaker
located near the batteries protects the circuit from
an overload and a three bank DC battery charger
recharges the batteries whenever the engine is
operating.
The trolling motor batteries are located in a for-
ward storage compartment. The circuit breaker
is located on the side wall of the compartment.
Make sure the trolling motor batteries are fully
charged and the main circuit breaker is activated
before using the trolling motor. The trolling mo-
tor will not operate properly if the batteries are
low. Always remember to turn the trolling motor
circuit breaker ON before using the trolling motor
and OFF when the system is not in use.
Trolling Motor DC Battery Charger
The DC alternator charger uses current from the
engine alternator(s) to re-charge the trolling bat-
teries when the engines are running. A master
cuto switch automatically turns charging OFF
and isolates the trolling battery system to pre-
vent drain on the boat 12 volt system while the
engine(s) are shutdown.
The wires that supply DC charging current to the
trolling batteries are protected by in-line fuses,
one for each battery output wire, near each bat-
tery. The in-line fuses protect the DC charging
circuit from the batteries to the charger. Another
fuse located at the DC charger supply wire con-
nection on the engine starting battery protects the
main DC power circuit to the charger.
https://www.boat-manuals.com/edgewater/
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