Mercury - Vengeance 3-Blade Stainless Steel Propeller 9.8" Diameter x 9.5" Pitch Right-Hand Rotation 3-Blade Stainless Steel Polished Finish 899818A05. Overview. There is something deeply satisfying about how a good stainless-steel prop feels under throttle - that solid, sure-footed push as your boat glides forward with confidence. The Mercury Vengeance 3-Blade Stainless Steel Propeller (Part Number 899818A05) captures that feeling perfectly. It's the kind of prop you can rely on whether you're