It was founded in 1953 and its first products included agricultural engines.
Numerous agricultural and industrial museums include portable engines within their collections.
The F-15E, despite its origins, includes significant structural changes and much more powerful engines.
Initial production included engines ranging from 6 to 40 horsepower.
Other uses include cold weather starting, vehicles that run out of fuel, and sometimes with flooded engines.
The estimated cost of $6 million did not include new engines.
General Dynamics said the $1.54 billion order included 46 aircraft, spare engines, weapons and other equipment.
Other museum pieces include engines, ground equipment, and ejection seats.
Early designs of the American shuttle included such engines, but they were eliminated to save weight and reduce the cost.
In 1997, tuner sales, which include body kits, wheels and engines, were just $295 million, according to the association.