1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 115Get this manual
ELECTRICAL trolyte solutionIf the solution should accidentally be neutralized by adding an alkaline substance, if distilled water was carelessly added, or if the solution was spilled, the battery solution may be changed and possibly restored to full state of chargeIt is not recommended that the electrolyte be changed in an old batteryWhen the electrolyte is drained from the battery, waste materials, the result of repetitive charging discharging may release from the sediment chambers and become lodged in separatorsIf the situation occurs, short circuit may result, causing damage to the electrical systemTo detect weak solution, proceed as follows: 1Charge the battery until "gassing" is clearly evident in each cellDrain the electrolyte solution from the charged battery and refill with waterCharge the battery until maximum specific gravity is obtained (see Battery Charge Table, page 107)Drain the solution and add prepared electrolyte to the proper levelCharge the battery until maximum specific gravity is obtained (see Battery Charge Table, page 107)If specific gravity accidentally gets too high, add water to dilute the solution to the specification (see Battery Charge Table, page 107)5