Gasoline generators are the most familiar type of generator. The fuel is readily available and is relatively inexpensive. The power per weight unit in a gasoline-powered generator is also more than other type of generators. Gasoline generators are less expensive than generators that use other fuel sources. However their price depends upon the components used. Multi cylinder, water-cooled engines are qualitatively superior and are priced high. These generators, unlike the cheaper, single cylinder, air cooled engines produce less noise and operate with a steady temperature. Some generators come loaded with features like overhead valves, low oil shut down, high temperature shutdown and electric starter. Engine speed and the type of alternators used also determine the life of the generator.
There are certain disadvantages using gasoline generators. Gasoline has a very short shelf life of approximately six months. Fuel stabilizers have to be added to keep the fuel from getting unusable. Gasoline is highly inflammable and storing gasoline for long duration of time can be extremely dangerous. Gasoline generators require frequent maintenance and there is the problem of condensation occurring in cold weather. Gasoline forms gum deposits especially in cold weather and can cause problems in fuel filters and carburetors if the generator is not run often.