Mercury - Bravo Four S Rear Propeller 25.5" Pitch Right-Hand 3-Blade Stainless Steel Polished 8M0167010. Overview. The Mercury Bravo Four S Rear 3-Blade Stainless Steel Propeller (8M0167010) finishes what the front prop starts, smooth, efficient thrust that makes even heavy surf boats feel agile. You will experience the drive connecting smoothly, pushing water in perfect synchronization with the front prop. It's a quiet, confident performer that helps you remain on plane longer and carve tighter