Yamaha 20D Manuel D'utilisation page 172

1) Disconnect and remove the battery
from the boat. Always disconnect the
black negative lead first to prevent the
risk of shorting.
2) Clean the battery casing and termi-
nals. Fill each cell to the upper level
with distilled water.
3) Store the battery on a level surface in
a cool, dry, well-ventilated place out
of direct sunlight.
4) Once a month, check the specific
gravity of the electrolyte and recharge
as required to prolong battery life.
4-10
GB