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6.1 General
Your boat is equipped with a 12 volt DC electrical
system and could be equipped with an optional
120 volt AC battery charging system. The battery
charger draws current from a shore power outlet
at dockside. The DC system draws current from
onboard batteries.
All wires in the electrical system are color coded to
make identifying circuits easier. Wiring schemat-
ics have been included with this manual to aid in
following an individual circuit of the boat.
The boat and engine charging systems are de-
signed for 12 volt, lead acid wet cell or absorbed
glass mat (AGM) batteries. Most wet cell batter-
ies will require similar maintenance as those in
automobiles. AGM and some wet cell batteries
are sealed and require no maintenance except
to periodically clean battery tops, terminal posts
and connections.
It is important that you know the type of batteries
in your boat and that the engine charging system
and optional battery charger are set to recharge
these batteries. Charging systems not set to the
proper battery type could cause unusually short
battery life, engine starting problems and damage
to the DC charging systems. You also should not
mix the brand or type of batteries.
The batteries in your boat were installed by the
dealer. They should be of the size and capacity
recommended by the manufacturer of your en-
gines. Labels on the battery cables indicate the
specications for the batteries required to power
the house and engine electrical systems. See the
engine owner’s manual for more information on
battery requirements. These specications should
be considered to be the minimum size battery
required.
Always consult your dealer before changing the
type of batteries in your boat or if you have ques-
tions regarding the batteries.
6.2 12 Volt DC System & Batteries
The 12 volt system is a standard twin engine ma-
rine system. There are three batteries, one for the
starboard engine, one for the port engine and one
for the house, accessory circuits and electronics.
The batteries themselves can be charged by the
engines or the optional battery charger, when
hooked to shore power.
Automatic battery isolator/relays (DVSR) manage
the charging current for the engine and house
batteries. The system is equipped with a battery
parallel feature that will connect both engine start-
ing batteries in parallel for extra battery power
while starting the engines.
Most 12 volt power is distributed to the accessories
through individual circuit breakers located in the
battery switch panel. Main breakers located near
the battery switches protect the main accessory
circuit, windlass and stereo amplier. Other cir-
cuit breakers or fuses protect the circuits for the
battery charger DC circuits, stereo and electronics
memory, engine control memory, and automatic
switches for the bilge pumps. Fuses located on
each engine protect the ignition, charging systems
and gauges. Other fuses provided by the engine
manufacturer protect auxiliary charging circuits
and other engine related electronic controls.
Some 12 volt accessories are operated directly by
a circuit breaker in the breaker panel while oth-
ers are operated by a switch fed by the breaker.
Most of the 12 volt accessories on the deck and in
the cockpit are operated by switches in the helm
switch panel.
PROPER FUSE OR BREAKER PROTECTION MUST BE
PROVIDED FOR ALL 12 VOLT EQUIPMENT ADDED. DO
NOT OVERLOAD THE ACCESSORY CIRCUIT BREAKERS
OR OTHER CIRCUITRY THROUGH ADDITIONAL 12 VOLT
EQUIPMENT.
Chapter 6:
ELECTRICAL SYSTEM
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