Yamaha - Lower Unit Assembly - LF300 - 6CF-45300-A1-8D See Description For Applicable ModelYamaha Lower Unit Assembly Lower Unit 6CF 45300 A1 8D Overview On the bigger Yamaha setups like the 300 horsepower range, the lower unit takes on serious load every time you push the throttle. If its worn or out of spec, youll feel it in vibration, noise, or rough shifting. Ive swapped these out on high horsepower rigs and the difference is immediateeverything tightens up and runs smoother. When its right, the boat handles better and the power