The JEGS 81963 is a fantastic little generator with a lot of features to appeal to a wide range of customers. The engine is a 7.5 HP OHV with a 223cc capacity that generates 5,000 peak watts and 4,250 rated watts. The generator's engine produces a decent seven and a half horsepower, and it is kept going by a big fuel tank that holds four gallons. This helps the JEGS 81963 to run continuously for 9 hours, which is quite amazing. Plus, it comes with a two-year residential and one-year commercial guarantee.