The Detroit Diesel Series 53 is a family of American two-stroke diesel engines produced by Detroit Diesel from the 1950s onwards, which can output anywhere from 98 hp to 233 hp, depending on the model. Available in configurations ranging from one to eight cylinders, the Series 53 was widely used in military vehicles, industrial equipment, trucks, and marine vessels. Known for its durability, simplicity, and distinct high-pitched sound, it featured a modular design, allowing for easy maintenance and adaptability. Though eventually phased out in favour of more efficient four-stroke engines, the Series 53 remains a respected workhorse in heavy-duty applications.