Searching renewable or sustainable energy and alternative engines is necessary to obtain efficient engine and compete conventional engine. Stirling engine, first patented by Robert Stirling in 1816, is one of mechanical device that converts heat from multi-fuel choices to be useful work. Stirling cycle engine, a hot gas engine or an external combustion engine, offers potential advantages over conventional engines in fuel flexibility, noise, and emissions. Multi-fuel choices, such as agricultural by-product, biomass, biodiesel, solar energy and etc., can be employed as the heat source for Stirling engine. Since Stirling engines are external heat source engines, consistent burning of fuel can