Boston Whaler 20 Justice Series, Operation & Maintenance Manual

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5-3
Electrical Systems Section 5
Capacities
Exide
®
marine heavy-duty 12-volt batteries are nor-
mally selected for your boat. One Group 24 1000
marine cranking amp (MCA) battery is provided for
engine starting and one Group 27 115 amp hour, deep
cycle battery is normally provided for the boat’s electri-
cal accessories. These batteries are considered wet-
cell and require periodic maintenance.
Your boat might be equipped with Optima
®
Blue Top
marine batteries. Optima batteries use spiral cell tech-
nology to improve vibration resistance and service life.
These batteries are classified as non-spillable and do
not require periodic checks of electrolyte levels.
With proper care, these marine heavy-duty batteries
will last several years.
Maintenance
Only use elastic lock nuts with flat washers or stan-
dard hex nuts with split lock washers and flat washers
to secure cables to the battery terminals. DO NOT
use wing nuts to secure cables to the battery termi-
nals.
Periodic battery maintenance is important to assure
that the boat will be ready for operation when needed.
Battery maintenance should include:
• Inspect the batteries and charging systems before
each mission for loose connections and damaged
wiring.
• Check and maintain the electrolyte level in all wet-
cell batteries. Add distilled water only, as nec-
essary.
• Coat the terminals and cable connections with
heavy grease to reduce corrosion.
• Keep the batteries dry and clean.