Mercury - Bravo Three Front 4-Blade Stainless Steel Propeller 15" Diameter x 28" Pitch Left-Hand Rotation Four Blades Stainless Steel Matte Finish 8M8022460. Overview. There is something reassuring about a prop that just feels right when you're pushing a heavy boat through open water. The Mercury Bravo Three Front 4-Blade Stainless Steel Propeller has that kind of confidence built in. You will notice it the moment you ease into throttle-how the boat rises steady, how the stern feels anchored, an