1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 113Get this manual
ELECTRICAL "C" "N" "P" "S" "X" Competition Electrode Racing Nickel Electrode Racing (Platinum) Electrode Heat Range Overlap Surface Gap Electrode when the engine is not runningWhen electrical trouble is experienced in any circuit, the battery should be checked first as source of possible troubleSince the battery is common to the ignition cranking and charging systems, it only makes sense to check the batteryIf the battery is defective, it should be replacedIf the battery is undercharged, the circuits must be checked more intensely