Mercury - SpitFire 4-Blade Aluminum Propeller 12.8" Diameter x 17" Pitch Right-Hand Rotation Four Blades Aluminum Satin Finish 8M8026590. Overview. There is a special satisfaction that comes when your boat leaps onto plane without hesitation, when every bit of power translates into smooth, clean thrust. The Mercury SpitFire 4-Blade Aluminum Propeller was designed for those moments. It is not just a piece of hardware - it is a difference you feel every time you throttle up. From quick hole shots