Polaris MSX 110 Owner's Manual For Maintenance And Safety page 47

OPERATION
Pre-Operation Inspection
Battery
WARNING
Causing sparks while servicing the battery or
servicing the battery when gas fumes are present
can result in an explosion, causing serious injury
or death.
Never create a spark while servicing the battery.
If you smell fuel in the craft, do not service the
battery. Take the watercraft to your dealer
immediately for inspection.
Confirm that the battery
terminal connections are
tight, and make sure the
battery is securely
fastened in its mounting
position. Inspect the battery
for leaks, and check the vent
hose for kinks or blockage.
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Check the battery fluid level and add only distilled
water if the level is low. Tap water contains minerals
that are harmful to a battery. Maintain the fluid level
between the upper and lower marks (1) on the battery.
Keep the battery in good condition and fully charged at
all times, as a weak battery can leave you stranded.
Never operate the watercraft with a battery that's too
weak to start the engine or shows signs of loss of
power.
Use a trickle charger to maintain the battery's charge
during the off season. Doing so will ensure a good
battery at the end of the storage period and a longer life
for the battery. The battery charger can be left
connected during the storage period and will
automatically charge the battery if the voltage drops
below a pre-determined point. See page 101 for part
numbers of Polaris products.