Fits Mercruiser, OMC & Others.Rplc. Merc #'s 12449, 817119A1, A4, 92497A3Volvo #'s 3854809, 3854182, 3853853, 3850927, 3857298Mando # Ac 155603Rplc. Pcm # Ra097006Internally Regulated, 55 Amp Neg. Ground3-Wire Hook-Up, Tachometer Lead,Supplied With A V-PulleyIgnition Protected SAEJ1171Red Wire Is For SensorPurple Wire Is For ExcitationArco# 60050OE# 92497A3 Sierra# 18-5966