Mercury - SpitFire Pontoon 4-Blade Aluminum Propeller 13.8" Diameter x 13" Pitch Right-Hand Rotation 4 Blades Aluminum Polished Finish 8M8026570. Overview. There's nothing quite like easing the throttle forward and feeling your pontoon rise just right - smooth, steady, and perfectly balanced on the water. The Mercury SpitFire Pontoon Propeller (Part Number 8M8026570) brings that feeling every time. It's a prop built by people who understand what weekend runs, family rides, and lazy drifts should