Reviews from boats.com claim that the Volvo Penta Duo Prop Outdrive has better handling, fewer vibrations, improved accelerations by 30 percent, easy maneuverability at low speeds and better planning ability, in addition to improved tracking. Volvo was the first to introduce the twin propeller Duo prop drive back in 1982.
Reviews by Boats.com claim that adding a second propeller removes some of the problems found in single prop engines, such as poor dockside control and a lot of wandering at slow speeds. The Volvo prop also has better water grip, and boat owners report an improved handling when moving in reverse.
Counter-rotating twin propellers give the engine more power and energy when driving the boat forward, thus improving the boats performance. Twin propellers result in faster accelerations and lead to increased speeds of up to 5 percent compared to single propellers. They produce evenly distributed shock pulses, thus lowering noise levels and fewer vibrations.
The Volvo Duo Prop comes in different models such as the DPH, DPR, and DPS, which have diesel or gasoline-powered engines that produce up to 380 horsepower. The Volvo's engine mounted water pump is cheaper to replace compared to those of other engines, and it's also user-serviceable.