Marcmotor ROS200

The Marcmotor ROS200 is an Italian aircraft engine, designed and produced by Marcmotor of Macerata for use in ultralight aircraft.

Design and development

The ROS200 is a twin-cylinder two-stroke, in-line, displacement, fan-forced air-cooled, petrol engine design, with a helical gear mechanical gearbox reduction drive with a reduction ratio of 3.5:1. It employs a single capacitor discharge ignition and produces at 9000 rpm, with a compression ratio of 10.6.