Yamaha E115A, Owner'S Manual

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A poorly maintained battery will quick-
ly deteriorate.
8
Ordinary tap-water contains minerals
harmful to a battery, and should not be
used for topping-up.
1) Check the electrolyte level at least once
a month. Fill to the manufacturer’s rec-
ommended level when necessary. Top
up only with distilled water (or pure de-
ionized water suitable to use in batter-
ies).
2) Keep the battery always in a good state
of charge. Installing a voltmeter will
help you monitor your battery. If you will
not use the boat for a month or more,
remove the battery from the boat and
store it in a cool, dark place.
Completely recharge the battery before
using it.
3) If the battery will be stored for longer
than a month, check the specific gravity
of the fluid at least once a month and
recharge the battery when it is low.
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