This addition to the Classic line features a 4-cyclinder diesel engine. Like all other Classics, the Classic 300D is a pure DC generator arc welder that is great for pipeliners and contrafctors. THe unit offers 300 amps iwth five current ranges and fine control in each range. In addition to its welding capabilities, the 300D generates 3,000 watts of AC auxiliary power. Operators can add versatility with a wire feed module.