Mercury - Black Max Aluminum Propeller - 3-Blade - 40-60 HP Bigfoot / Command Thrust FourStroke engines with 4.25" gearcase only (all years) - 14 Dia. - 11 Pitch - 48-77338A33. The Black Max aluminum propellers are standard equipment on most boats with Mercury/Marine/MerCruiser power. Recommended for use on oats with up to 300 horsepower and with a top speed of less than 50 MPH. Pontoon style props available.. High quality die cast aluminum. Attractive and durable high-gloss Phantom Black finish. Easy to maintain & repair. This Mercury Black Max aluminum propeller fits the following Mercury outboard models:. 40-60 HP Bigfoot / Command Thrust FourStroke engines with 4.25" gearcase only (all years)