1984 Ski-Doo Shop Manual, Page 298Get this manual
SECTION 04 ELECTRICAL SUB-SECTION 04 (BATTERY)
BATTERY CHARGING EQUIPMENT
The battery charger must have an adjustable charging rateVariable adjustment is preferred, but unit which can be adjusted in small increments is acceptableThe battery charger must be equipped with an ammeter capable of accurately measuring current of less than one ampere If your present charger is not adjustable to the proper current values, rheostat can be connected in series with the battery to provide adjustment12 Ohm, 50 watt rheostats, such as OH MITE0314 or MALLORY 50K 12P, are available from electronic parts supply shops and they are suitable for use with most chargers if the peak current is held below ampsIf you need an accurate ammeter, we recommend the use of: SHURITE5202 (0 to amps) or5203 (0 to amps) available from electronic parts supply shops +