Hypereutectic aluminum alloys have Si content commonly between 14% and 20%. The use of such alloys gives a number of benefits such and low specific gravity, high resistance to wear and reduced thermal expansion. In the continuous casting of hypereutectic Al-Si alloy billets, the distribution of primary silicon become important to obtain uniform physical properties. In this study, the electromagnetic stirring technique was applied to control the distribution of primary silicon. A rotational flow of melts induces the segregation of primary silicon around casting surface. Turbulent flow of melts by electromagnetic stirring enhances the distribution of primary silicon. The electromagnetic stirring parameters such as intensity, time and interval, were investigated. Finally, the mechanical properties were examined and compared with different samples and discussed the applications of electromagnetic stirring to control the distribution of primary silicon in billet casting.