NEW Mercury Black Max propeller 48-19638A40. This propeller is equipped with a Flo-torq I rubber hub. Additional parts may be required to complete installation. Please see inside for further details. Diameter 10 3/8, 11 pitch, 3 blade right hand, aluminum material. 9.9 & 15 hp Bigfoot FourStroke outboards and Mercury/Mariner 18-25 hp outboards. List price $153.07. Our price $109.84 plus shipping.