[1] The basic engine was originally designed and produced by JLO-Motorenwerke of Germany and was later acquired by the AMW Cuyuna Engine Company of Beaufort, South Carolina and marketed under the Cuyuna brand name.
Later the engine was marketed by Cuyuna under the Two Stroke International (2si) brand.
[2][3][4][5] The 215 is a conventional single-cylinder engine that weighs 39 lb (18 kg) in its 215R aircraft version.
It also incorporates piston porting, tuned exhaust system, single carburetor, fan cooling, fuel pump, a cast iron cylinder liner, ball, needle and roller bearings throughout.
The 215R aircraft version was offered with an optional belt reduction system and the modern industrial versions have an optional gearbox with ratios of 2.04, 2.65 and 3.06.