Honda 190cc premium residential, horizontal shaft engine features a unique overhead valve/overhead cam design that delivers an excellent power-to-weight ratio. The GS Series engine is incredibly quiet and utilizes the world's first internal timing belt. It also features a cast iron cylinder sleeve for longer service life and meets EPA and CARB emission level standards. The GS is a rugged, powerful and economical overhead cam engine designed specifically for long-term home use and light-duty commercial applications. U.S.A.