Wood Chipper WCH18 have self engine,can use it easily. Model: WCH18 Dimension(LxWxH): 1700x1100x2000mm Structure Weight: 370KG Max .chipper diameter: 8¡¯¡¯ Blade Turning Radius: 302mm Chipper Max. Radius: 200mm Chipper Efficiency: 5~9m3/h Power required: Self-powered 18hp diesel engine