The largest V6 engine displacement, at 4.4 liters The following features of the DF350A were valued for the receipt of the award: IBEX Innovation Awards are the best awards in the marine technology, which are given to those new products in the marine industry that demonstrate distinctive technological innovations and deliver outstanding consumer benefits. We call it Parting Seas (Geki kanji symbol.)
They have succeeded in this quest – and the result is a revolution in innovation. Suzuki engineers labored mightily through years of computer simulations, trial and error, and on-water testing, to significantly improve the way an outboard converts engine power into underwater thrust. Could we design a lower unit that could house stronger gears and yet minimize the disruption of the flow of water to the propellers? This typically results in a larger gear case – and consequently, more disruption of the flow of water to the propeller. More power and torque require stronger, larger gears to transfer power from the driveshaft to the propeller shaft. Secondly, the leading edge of the gear case disrupts the flow of water over the propeller. Was there a way we could convert this wasted energy into productive power and improve propeller efficiency? A single propeller creates forward thrust, to be sure, but also produces a significant amount of rotational energy as a byproduct. In developing the DF350A, we started with a blank sheet of paper, and considered all these factors in our design and engineering.įirst, we looked at the traditional single propeller design. On top of all this, boat speed is ultimately limited by hull design, the hydrodynamics of the lower unit and propellers, and how the outboards are mounted.
However, larger displacement engines typically burn more fuel, adding weight creates a wide range of problems for boats, and more complex mechanical components create reliability concerns. Increasing displacement, or the use of a turbocharger or supercharger, makes more horsepower.
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