Mercury - MerCruiser Bravo III Prop Wrench Specialty Service Tool Powder-Coated Steel 8M0129074. Overview. Any boater who has spent a weekend chasing the perfect ride knows how important it is to have the right tools on board. When it comes time to pull the prop on a Bravo III sterndrive-whether you are swapping for a fresh set of blades or clearing debris-you do not want to wrestle with makeshift wrenches or tools that never quite fit. The Quicksilver MerCruiser Bravo III Prop Wrench gives you