M
A I N T E N A N C E A N D
S
E R V I C E
6–7
B
ATTERIES
Proper battery power is essential to the operation of your vessel. For this reason, Grady-White
has carefully chosen a battery with cranking ability and reserve capacity sufficient to meet your
needs. The factory installed Deka Marine Master 27M6 battery is a maintenance free battery. This
battery utilizes an exclusive demineralized electrolyte and maintenance free calcuim alloy grids.
These features reduce water loss and extend the life of the battery. However, this battery is
maintenance accessible in the unlikely event a charging malfunction occurs. If your boat is
equipped with batteries not installed at the factory, consult with the battery manufacturer for
proper care and maintenance instructions and the engine manufactruer for appropriate battery
specifications. Grady-White recommends the Deka 27M6 product for all replacement
applications. Batteries must be secured in a non-metallic tray to contain electrolyte spills. An
insulated boot should cover battery terminals. Keep terminals clean by scrubbing them with a stiff
brush and a mixture of baking soda and water. Afterwards, apply a light coat of grease or
corrosion preventative.
Batteries contain sulfuric acid, a harmful and potentially volatile chemical. When handling
batteries, exercise caution and follow these guidelines.
• Avoid contact between skin, eyes, or clothing and sulfuric acid.
• Protective gloves, eye wear, and clothing should be worn when
servicing to minimize risk to yourself.
• Batteries produce explosive gases. Keep sparks, flames and cigarettes
away. Ventilate when charging or using in an enclosed space.
• Keep out of reach of children
This is not a complete set of guidelines. It is your responsibility to safely maintain your
batteries and avoid injury. Use good judgement and remain alert to prevent an accident. In the
event of an accident or exposure to electrolyte, immediately seek prompt medical advice or
attention.
W A R N I N G
Do not allow any electrically conductive material to make contact with both the positive and
negative terminals at the same time (i.e. a hand tool used when disconnecting and reconnecting
battery cables). A short of this nature can cause severe burns and create dangerous sparks which
could result in personal injury and/or property damage.
C A U T I O N
When disconnecting and reconnecting battery cables, the black cable must be connected to the
negative terminal and the red cable must be connected to the positive terminal. Reversing these
connections will immediately damage your system.
Never disconnect the battery when the engine is running. This can cause damage to the charging
system. When replacing your battery, use the same brand and type as the factory installed battery.
If this is not availible, reference your engine Owner’s Manual for recommended battery type and
required performance specifications.
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