Mercury - Tempest Plus 3-Blade Stainless Steel Propeller 14.6" Diameter x 27" Pitch Right-Hand Rotation 3-Blade Stainless Steel Polished Finish 8M0151388. Overview. There's something special about the moment your boat surges forward when the throttle responds instantly, the hull lifts clean, and the water smooths out beneath you. The Mercury Tempest Plus 14.6" x 27" Pitch Propeller (8M0151388) is built for that exact feeling. It's designed for boaters who chase speed and precision, who want a pr