Abstract:

This work represents an experimental study on the performances of a single cylinder spark-ignition marine engine fueled by ethanol blends. Several studies have been carried out to investigate the use of alternative fuels in spark-ignition engines to improve their efficiency and reduce exhaust emissions. The experiments have been conducted on a test bed under full load condition with varied engine speed from 1000 rpm to 3000 rpm and an engine wall’s temperature fixed between 75°C – 85°C. The study includes the blending of ethanol and gasoline with different blending ratios (E0, E5, E15, and E20). The results of the study showed that E15 conducted for better results in specific fuel consumption without notable loss in engine performances in comparison with other blends. Experiments showed that ethanol blends are a viable option as a fuel alternative in spark-ignition engines due to its potential to conserve acceptable engine performances.

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