Yamaha Lower Unit Assembly - 6L2-45300-04-8DYamaha Lower Unit Assembly Outboard Drivetrain 6L2 45300 04 8D Overview You can usually tell when a lower unit is starting to goshifting gets rough, noise creeps in, and the motor just doesnt feel right under load. This is the kind of replacement that brings everything back to smooth, reliable operation. It lines up the way it should, runs quiet, and gives you that solid feel when you drop it into gear. Once its on, its the kind of part you dont have