Yamaha - Lower unit assy - 68S-45300-34-8DYamaha Lower Unit Assembly Outboard Drive System 68S 45300 34 8D Overview When everythings working right, you dont think about your lower unitbut when its not, it shows up fast in performance. This 68S 45300 34 8D assembly is built to keep power flowing clean and smooth from the engine to the prop. Its the kind of OEM replacement you install once and trust, whether youre running hard or just cruising. Solid construction and proper fitment make a big