[1] Electric Boat acquired a license to manufacture MAN diesels, approximately in the year 1909.
[citation needed] These were initially manufactured by the Fore River Shipyard of Quincy, Massachusetts, where most of Electric Boat's early submarines were built under subcontract.
Idealia was owned by ELCO into 1916 and used for demonstrating the application of diesel engines in yachts.
[6][7][8] The original Idealia installation was a reversible, air started, two cycle engine with six working cylinders and a two-stage air compression cylinder that was rated at 150 horsepower at 550 revolutions per minute.
Electric Boat had a drought in submarine contracts 1918–1931, which probably caused NELSECO's demise.