OUTBOARD GEARCASES

All that power. It won’t get you anywhere without a properly designed gearcase. One that fits your boat and engine properly. In addition to the gearcases that come standard with your outboard, Mercury has engineered specialized gearcase options to fit unique boat application and performance needs. Whatever Mercury outboard you’re running, rest assured you’ll have the perfect performance-matched gearcase that gets the most out of your outboard.

The standard bearer. Specifically designed to leverage the hydrodynamic engineering expertise that ensures that the horsepower your Mercury outboard creates is efficiently transferred to the propeller, providing you the performance and fuel efficiency you come to expect from your engine.

The larger Command Thrust “CT” gearcase with a bigger-diameter propeller lifts heavy boats onto plane more easily and holds them there at lower speeds without impacting top speed.

Perfect for more aggressive go-fast boats and commercial offshore applications that operate in rough seas or want that extra mile per hour. We pair our Offshore 5.44-inch gearcase with a 1.75 gear ratio and 1.25-inch prop shaft for added durability.

The Torque Master II gearcase is designed specifically for performance bass boats with top speeds of up to 85 mph. Its stout 1.25-inch prop shaft can handle the strain of running at an elevated mounting height. Patented front water pickups keep the engine running cool regardless of engine height. A cambered skeg improves handling and drivability.

Sport Master Gearcase offers heavy-duty durability for boats that travel in excess of 85mph (74 knots). The Sport Master gearcase is equipped with low-water pick-ups and a crescent leading-edge torpedo design that maximizes efficiency.