This addiction to the Classic line features a 4-cyclinder Perkins diesel engine. Like all other Classics, the Classic 300D is a pure DC generator arc welder that is great for piepliners and contractors. 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