2018 Suzuki Marine 50 HP DF50AV Outboard Motor

Suzuki built the DF50AV around a "High Energy Rotation" lower unit geared at 2.42:1, letting its 3-cylinder, 941 cc four-stroke swing a bigger, 14-inch propeller. That combination favors pontoon boats and other heavy, wide hulls that need steady low-speed pulling power over outright acceleration.

Why the gearing matters

A standard lower unit spins its propeller faster but moves less water with each turn; this one gives up some top speed for the extra pull a heavy boat needs. Weigh your hull type against that trade-off, and do not assume this gearing is interchangeable with a lighter-duty 50 hp mount.

Inside the engine

This DOHC, 12-valve engine tops out near a recommended 5300-6300 rpm, with the fuel system injecting at multiple points and Suzuki tuning the mixture for efficiency rather than relying on a carburetor. Remote steering and electric start are standard, a 19-amp alternator runs on 12 volts, and at 253 pounds, double-check that your transom matches the 20-inch recommended height.

Alongside the motor, Suzuki packs in an owner's manual, a tool kit and a propeller, plus the usual 3.1-gallon tank and fuel line, all under three years of coverage.

What kind of boat calls for this lower-unit gearing? Pontoon boats and other heavy, wide-hulled craft.

Will it perform poorly on a lighter boat? It will run, but the gearing is optimized for pulling heavier hulls, so a lighter boat may not see the full benefit of this particular setup.