Mercury - Flo-Torq II Hub Kit, Yamaha 200-250HP Propeller System 8M0075402. Overview. When you're running a Yamaha VMAX SHO, the hub you choose makes a bigger difference than most people realize. A good hub keeps the prop biting cleanly and gives the drivetrain a little forgiveness when you bump something underwater-as every boater eventually does. This Flo-Torq II kit lets you bolt a Quicksilver prop onto a Yamaha while still giving the lower unit that built-in "cushion" these drives appreciate