Engine: OHV25°Tilt Single Cylinder ,Forced Air Cooling，4-Stroke Rated Watts: 4500W Surge Watts: 5000W Frequency: 60Hz Outlets: Two-120V (20A) AC, One-120/240V (30A) AC Locking Receptacle Amps：37.5/18.7A 12V(10A) DC output : Automotive Battery Charging Voltage Regulate: Self-excited voltage Fuel Tank Capacity: 7 US gallons(25L) Run Time@ 50% Load：12 Hours Brushless Engine Model: SD188F Displacement: 389ml Max.Watts: 9.6kw(13HP)/3600rpm Oil Capacity: 37 fluid oz.(1.1L) Start System: Electric Package Dimension(in): 29.1x22x23.6 N.W/G.W: 192/200 lbs. 40 Ft.Cont.Load(Units): 204