Magneto Kit This kit fits Wisconsin engine model: AA,      AB,      ABN,      ABS,      AK,      AKN when equipped with Fairbanks Morse magneto number(s): FM-XD1B7        FMXD1B7         XD1B7 fits Wisconsin OEM magneto number(s): Y73,        Y73S,        Y-73-S1,       Y73S1