Yamaha RS90RK, Service Manual

Page: 138 / 841

2-48
INSP
ADJ
BATTERY INSPECTION
12. Charge:
• Battery
(refer to the appropriate charging method
illustration)
WARNING
Do not quick charge a battery.
CAUTION:
• Make sure that the battery vent is free of
obstructions.
• Never remove the MF battery sealing caps.
• Do not use a high-rate battery charger. They
force a high-amperage current into the battery
quickly and can cause battery overheating
and battery plate damage.
• If it is impossible to regulate the charging cur-
rent on the battery charger, be careful not to
overcharge the battery.
• When charging a battery, be sure to remove it
from the snowmobile. (If charging has to be
done with the battery mounted on the snow-
mobile, disconnect the negative lead from the
battery terminal.)
• To reduce the chance of sparks, do not plug
in the battery charger until the battery charger
leads are connected to the battery.
• Before removing the battery charger lead
clips from the battery terminals, be sure to
turn off the battery charger.
• Make sure that the battery charger lead clips
are in full contact with the battery terminal
and that they are not shorted. A corroded bat-
tery charger lead clip may generate heat in
the contact area and a weak clip spring may
cause sparks.
• If the battery becomes hot to the touch at any
time during the charging process, disconnect
the battery charger and let the battery cool
before reconnecting it. Hot batteries can
explode!
• As shown in the following illustration, the
open-circuit voltage of a MF battery stabilizes
about 30 minutes after charging has been
completed. Therefore, wait 30 minutes after
charging is completed before measuring the
open-circuit voltage.