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What will be the fuel of the future? More topical topic than ever, especially affecting the automotive sector, but it is making inroads everywhere where engines are concerned, and boating cannot be outdone. Biofuels? Electric? Hybrid? While waiting to find out the winner, the search continues and Suzuki, meanwhile, is giving ethanol a try.
Ethanol is nothing more than ethyl alcohol. Derived from the fermentation of renewable raw materials(grains, agricultural waste, organic waste), it can reduce COâ‚‚ emissions throughout its life cycle, and also breaks down particulate matter, with the added bonus of a high octane rating. The logistics are simple, and in low percentages it is already used in widespread automotive E5/E10, but in purity it requires specially developed engines.
Unveiled at the Japan Mobility Show 2025 in Tokyo, the DF60A FFV Concept is a gasoline-ethanol outboard developed as part of the “multi-pathway” strategies Suzuki is pursuing to achieve carbon neutrality.
As the name implies, it is only a concept at the moment. The prototype introduces a Flexible Fuel Vehicle (FFV) fuel system, capable of running on fuels containing different percentages of ethanol-from E10 (10 percent) up to E100 (100 percent)-making the unit compatible with next-generation biofuels, which are increasingly popular in emerging markets.
In a 4-stroke engine such as the DF60A FFV Concept, ethanol fueling requires optimized management of the air-fuel mixture, a specially calibrated electronic fuel injection system, and the use of materials that are resistant to the increased hygroscopicity of alcohol, i.e., its tendency to absorb moisture from the environment. This phenomenon, typical of alcohol fuels, can alter the chemical properties of the fuel and compromise metal parts or fuel circuit components over time if not properly protected. Suzuki has therefore developed specific solutions, which ensure reliability, safety and consistent performance, even in marine environments characterized by high humidity.
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