Supra SL Owner's Manual page 69

Battery Cable
Installation & Precautions
Your battery is an important part of your boat. It provides all the power
to start your boat and allows all of your electrical components (bilge
pump, blower, stereo, etc.) to work even if the motor is not running.
Because of its important role, Supra recommends using a high quality
"Marine Dual Purpose" battery. The "Dual Purpose" rating means that
it can provide the cranking Amps needed to start your motor, yet it
also has an Amp hour discharge rating so it can handle low electrical
drawdown cycle.
Your Supra electrical system is a negative ground type. The negative
battery cable is grounded to the engine block. The positive battery
cable is connected to the starter solenoid.
Failure to connect battery cables as outlined will damage the system
and void the warranty.
Sulfuric acid in the battery can
cause serious burns. If spilled on
skin or in eyes, flush with clean
water immediately, then seek
medical attention.
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Hydrogen and oxygen gases are produced
during normal battery operation and charging.
Sparks or flames near the battery vent
openings can cause the mixture to ignite and
explode.
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