Upgrade your 4075hp Johnson or Evinrude outboard motor with Solas Amita 3-Blade Johnson-Evinrude BRP OMC 40-75hp Aluminum Propellers. These ultra-durable aluminum props utilize an exclusive squeeze-cast process. Strong blades enhance your outboard's performance with excellent acceleration and maximum top speed. Small 3.375" gearcase, 13-tooth spline. Right rotation. State-of-the-art squeeze-casting process Enhances your outboard's performance Great acceleration and top-end speed