Mercury - SpitFire 4-Blade Aluminum Propeller 14" Diameter x 21" Pitch Right-Hand Rotation 4 Blades Aluminum Polished Finish 8M0084496. Overview. There is a certain thrill in throttling up and feeling your boat leap forward, steady and sure, like it's reading your mind. That is the kind of connection you get with the Mercury SpitFire 4-Blade Aluminum Propeller (Part Number 8M0084496). Built for boaters who crave responsive control and quick lift, this prop grips the water with confidence and kee