Mercury - SpitFire Pontoon 4-Blade Aluminum Propeller 13.8" Diameter x 10" Pitch Right-Hand Rotation Four Blades Aluminum Satin Finish 8M8026555. Overview. If you spend your weekends cruising calm coves or cutting across open lakes with friends aboard a pontoon, you know how much the right prop changes everything. The Mercury SpitFire Pontoon 4-Blade Aluminum Propeller delivers that instant lift and control that makes a boat feel lighter and more responsive. It's the kind of prop that grabs the