Mercury & MarinerFits 4 Cyl. 1977-94, 75-90 H.P.Fits 3 Cyl. 1986-88, 80 H.P. 65-JetRplc. Merc #'s 50-60315, 50-65436,50-66015, 66015-2 & 66015T110 Tooth Starter DriveArco# 5375OE# 50-893891T Sierra# 18-5604