Mercury - Bravo Four S Aft/Rear Propeller 19.5" Pitch Right-Hand 3-Blade Stainless Steel 8M0167002. Overview. Every boater knows that smooth power is what separates a good ride from a great one. The Mercury Bravo Four S Aft/Rear 3-Blade Stainless Steel Propeller (part number 8M0167002) gives that unmistakable push you feel when the boat lifts onto plane - steady, confident, and quiet. Built for the Bravo Four S forward-facing sterndrive, this prop takes the torque of a surf boat and turns it int