Mercury - SpitFire 4-Blade Aluminum Propeller 9.3" Diameter x 9.5" Pitch Right-Hand Rotation Four Blades Aluminum Satin Finish 8M8026650. Overview. There's a special kind of satisfaction when your boat responds exactly how you want it to - when the engine hums, the prop digs in, and you glide forward with clean, confident power. The Mercury SpitFire 4-Blade Aluminum Propeller was built to give you that feeling every time you hit the throttle. Designed for smaller outboards, it delivers the kind