The current research is the second part from study of the bioethanol production under local conditions. The experiments were carried out at the agricultural engineering laboratory, Agricultural Engineering Department, faculty of Agriculture, Kafr El Sheikh University. The experimental aimed to investigate of the possibility to use an alternative fuel for gasoline engine by using various ratios from bioethanol and gasoline. The bioethanol was produced after microbial pre-treatment for starcheous liquid of potato wastes and subsequent fermentation with Saccharomyces cerevisae under laboratory conditions. The blend fuel E10, E30 and E60 were prepared and used at three throttle fuel positions .The engine model Mikuni 13.5 KW at the maximum rotational speed 3600 rpm tested under different blend fuel. The result showed that the Gasoline with octane 80 Nr. gave the highest values of treatments for piston sprayer pump and gasoline engine compared to the E10, E30 and E60 of fuel blend, respectively. The engine break horse power at the second fuel throttle position and with load of engine were 6.9 KW, 6.8 KW and 6.9 KW for the fuel blend E10, E30 and the gasoline Octane 80. The fuel blend E10 and E30 gave no significant different compared with the gasoline Octane 80 fuel on the effect of the rotational speed under all treatment conditions. The operating of the engine with load gave the highest values of noise of the engine compared to operate the engine without load for all blend fuel and Gasoline fuel tests. The blend fuel E60 gave the low values of sound level compared to the other blend fuel and Gasoline fuel. On the other hand, the effect of the increasing of throttle position from first to third position those mean the increasing of fuel flow rate tends to increase the sound level.
The lower values of noise pollution of the engine were 68.1 dB, 78.8 dB and 81.7 dB for the fuel blend E60 with load at first, second and third fuel throttle position respectively.