Mercury - Tempest Plus 3-Blade Stainless Steel Propeller 14.6" Diameter x 17" Pitch Right-Hand Rotation 3-Blade Stainless Steel Polished Finish 8M0151380. Overview. There is something special about running a prop that just feels right smooth, strong, and perfectly in tune with your boat. The Mercury Tempest Plus 14.6x17 Right-Hand 3-Blade Stainless Steel Propeller (8M0151380) has earned that kind of trust among serious anglers and performance-minded boaters. It's the prop you can count on to lau