Generac 6864, 5000 Running Watts/5500 Starting Watts, Diesel Powered Portable Generator Durable, fully welded 1 1/4" steel frame Yanmar LW Series 435cc air-cooled direct injection, industrial-grade diesel engine Diesel power requires less maintenance, is more efficient, and provides a long life True Power Technology provides less than 5% total harmonic distortion for clean, smooth operation of sensitive electronics, tools and appliances True Power Technology provides less than 5% total harmonic distortion for clean, smooth operation of sensitive electronics, tools and appliances