The Lifan OHV design provides better fuel efficiency, quieter operation and longer life. Ideal for those looking for exceptional value plus premium quality. Industrial grade 11 HP OHV Lifan engine. 5500W surge power/5000W continuous power. Voltage selector switch for full amperage availability to either 120V or 240V. 12V DC power receptacle/plug, cord and alligator clips included. Heavy duty wheel kit with 10" ever flat foam filled tires. Low oil shutdown for maximum engine protection.