Mercury - Quicksilver Bravo Three 4-Blade Stainless Steel Propeller 15.9" Diameter x 21" Pitch Left-Hand Rotation 4-Blade Stainless Steel Matte Finish 8M0123404. Overview. There's a deep satisfaction in feeling your boat respond perfectly - steady, balanced, and ready for anything. The Quicksilver Bravo Three 4-Blade Stainless Steel Propeller (Part Number 8M0123404) delivers that kind of control and power every time you throttle up. Built for boaters who expect performance without compromise, it