1972 Ski-Doo Shop Manual, Page 227Get this manual
3-06-04 vity of each cell with hydrometerCells should give uniform reading of 1.260 if battery is fully' charged at 800FStep twoCheck electrolyte in each cell and add distilled water (if unavailable, drinkable tap water), as necessaryCAUTION: Do not over fill bottom of vent wellsNOTE: Accurate electrolyte readings can only be taken after the cell fluids are thoroughly mixed, Leafter chargingStep threeCharge the battery fullyUsing 12 volt charger (5 amps) or trickle charger until 1.260 specific gravity readings are achievedCAUTION: Battery electrolyte must not exceed 1200FStep fourClean battery terminals and cable