Mercury/Mariner Vengeance 3-Blade Props 40-50BF FS, 60 BF-75-115 TS/FS 125 The Vengeance Three-blade stainless steel propeller is an excellent choice for the boater who wants to upgrade from an aluminum prop. The Mercury Vengeance is a fine propeller for outstanding durability and good overall performance on most outboard and sterndrive powered boats. For all outboards and Alpha, Bravo one sterndrives. Better acceleration and handling than 3bld aluminum, Over 5 times more durable than an aluminum prop, Proven blade design, Available in left or right rotation, and 9-25 pitch. Small HP props are equipped with Flo-Torq I rubber hub, Others equipped with Flo-Torq II.