Mercury - Verado12 Front Propeller 27.5" Pitch Left-Hand 4-Blade Stainless Steel Polished 8M0166985. Overview. There is something unforgettable about how a well-matched prop makes a big boat feel lighter. The Mercury Verado12 Front 4-Blade Stainless Steel Propeller (part number 8M0166985) does exactly that. It takes all that V12 horsepower and turns it into smooth, confident lift with no wasted effort. From the moment you ease into the throttle, the response feels natural - steady acceleration,