Yamaha Lower Unit Assembly - 6L2-45300-04-4DYamaha Lower Unit Assembly Outboard Drivetrain 6L2 45300 04 4D Overview When a lower unit starts giving trouble, youll feel it right awayrough shifting, noise, or just not running as smooth as it should. This is the kind of replacement that brings everything back to life without overthinking it. It bolts up clean, runs quiet, and gives you that steady, predictable performance you want on the water. Whether youre maintaining your setup or fixing a