Mercury - Tempest Plus 3-Blade Stainless Steel Propeller 14.6" Diameter x 25" Pitch Right-Hand Rotation 3-Blade Stainless Steel Polished Finish 8M0151386. Overview. There's a moment every boater lives for the perfect mix of speed, control, and that feeling of power beneath your hands. The Mercury Tempest Plus 14.6" x 25" Pitch Propeller (8M0151386) delivers exactly that. It's built for those who demand more out of their setupfaster hole shots, higher lift, and the confidence to push their boat a