Mercury - Verado12 Front Propeller 24.5" Pitch Left-Hand 4-Blade Stainless Steel Polished 8M0166981. Overview. When you run big water, you can feel when a prop's dialed in. The Mercury Verado12 Front 4-Blade Stainless Steel Propeller (8M0166981) transforms that raw V12 power into something controlled and confident. Every push of the throttle feels intentional - no hesitation, no chatter, just a clean surge of energy that lifts even the heaviest hulls onto plane. It is the kind of performance tha