Mercury - SpitFire 4-Blade Aluminum Propeller 13.4" Diameter x 15" Pitch Right-Hand Rotation Four Blades Aluminum Satin Finish 8M8026580. Overview. There is a moment every boater remembers - that instant when your boat jumps onto plane, smooth and steady, without hesitation. The Mercury SpitFire 4-Blade Aluminum Propeller delivers that moment every single time. It's built for boaters who want more than just movement; they want precision, balance, and control that feels effortless. From slow crui