OIL SEAL SET, Crankshaft rear bearing. Part number OMC 473424.This 2 piece rear main crankshaft seal fits V4 & V6 OMC Stringer sterndrives 1985 and older. 2.5L 3.0L 3.8L, 120 HP 140 HP.This is a brand new factory part, not an aftermarket. Fits over 300 OMC stern drive motors. Please check the part number for your fitment needs.