Rotax 503 (Paperback)

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Rotax 503 is a 37 kW (50 hp), in line 2 cylinder, two-stroke aircraft engine, built by BRP-Rotax GmbH & Co. KG of Austria for use in ultralight aircraft. The Rotax 503 features piston ported, air cooled cylinder heads and cylinders, utilizing either a fan or free air for cooling. Lubrication is either by use of pre-mixed fuel and oil or oil injection from an externally-mounted oil tank. The 503 has dual independent breakerless, magneto capacitor-discharge ignition (CDI) systems and can be equipped with either one or two piston-type carburetors. It uses a manifold-driven pneumatic fuel pump to provide fuel pressure. An optional High Altitude Compensation kit is available.