Gasoline Engine Advantages

By 1903 the gasoline engine was already recognized for its obvious benefits

Columbus Gas and Gasoline Engines
April 1903 ad for Columbus Machine Co. engine shows a nice cam stopper sideshaft, perhaps a 5 HP model. This engine also features Columbus' interesting evaporative cooling tower (visible just behind the flywheel), which utilized a series of pans, the cooling water dripping from one pan to the next.