1970-1973 Ski-Doo Snowmobiles Technical Data Manual, Page 85Get this manual
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1973 Alpine 640ER
RD RECTIFIER MAGNETO GENERATOR YL GR YL GR YLGR RD RD YL BL BL BL
GR FUSE GR
'-RD RD 1- OFF 11- ON IIILIGHT IVSTART
IGNITION COIL IGNITION COIL MAGP.T.OI