[4] The Rotax 503 is piston ported with air-cooled cylinders and heads, utilizing either an engine driven fan and cowl, or free air cooling.

The 503 has dual independent breakerless, magneto capacitor-discharge ignition (CDI) systems.

The standard engine includes a muffler exhaust system with an extra after-muffler as optional.

An integral alternating current generator producing 170 watts at 12 volts with external rectifier-regulator is optional.

Such crash landings can lead to serious bodily injury or death...This is not a certificated aircraft engine.