H74 5cc 4-Stroke 2-Cylinder Water Cooled Gasoline Internal Combustion Engine Model Features:.Vintage Engine: This is a vertical dual-cylinder gasoline engine with vintage outlook and mechanical speed governor, and it allows engine to stabilized a set of speed..The engine adopts water circulation cooled, with radiator tank, water pump and fan. Equipped with ignition system and powered by 4.5V (3 x AA battery)..This is a perfect mechanical craft which is made from brass and stainless steel...