Mercruiser, OMC, Volvo Penta 12V 65-Amp Mando Style Alternator 6-Groove Serpentine Pulley, Replaces 

Fits Mercruiser I/O & Diesel
Rplc. Merc #"s 805884T & 805447T
7.3L Merc Diesel 1994-98
Rplc.Volvo/OMC #"s 3856600,
3857561, 3860171 Single V-Pulley,
Ignition Protected SAEJ1171
3-Wire Hook-Up, Tachometer Lead
Red Wire Is For Sensor
Purple Wire Is For Excitation
Arco# 60065
OE# 805884T
Sierra# 18-5965