[3][4][5] The pusher engine, usually a 25 hp (18.6 kW) KFM 107ER two-cylinder horizontally-opposed two-stroke, is mounted on the upper rear of the pod.

Aft of the pod the boom is slender and carries a large butterfly tail with full span control surfaces.

For optimum performance the Marco J-5 can be built with a glider-type retractable monowheel, using stabilizing wheels mounted in downturned trapezoidal wingtip extensions.

[3] The kits for the J-5 Marco were originally produced at the Marko-Elektronic Factory in Łódź, Poland, where an aircraft branch was established for the purpose.

[11] Aviation Farm marketed or planned two variants[7] in addition to the mono- and conventional undercarriage versions noted above: Data from Jane's All the World's Aircraft 1991/2[4]General characteristics Performance