Yamaha 20C Owner's Manual page 162

1) Check the electrolyte level at least
once a month. Fill to the manufactur-
er's recommended level when neces-
sary. Top up only with distilled water
(or pure de-ionized water suitable to
use in batteries).
cC
Ordinary tap-water contains minerals
harmhul to a battery, and should not be
used for topping-up.
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
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.
EMU01279
Connecting the Battery
w
Mount the battery holder securely in a
dry, well-ventilated, vibration-free loca-
tion in the boat. Install a fully charged
battery in the holder.
4-23
GB
recharge the battery