The Rotax 503 is a 37 kW (50 hp), inline 2-cylinder, two-stroke aircraft engine, built by BRP-Rotax GmbH & Co. KG of Austria for use in ultralight aircraft. [1][2]

The Rotax 503 Series is a two-stroke aircraft engine designed for light aircraft and ultralights. It produces approximately 52 horsepower and is known for its lightweight and compact design, …

Rotax 503 engine, 503 Rotax aircraft engine, specifications and data. Ultralight News! L'il Buzzard! Click here for this months specials! For Rotax 503 service bulletins, Rotax 503 parts, …

The Rotax 503 UL DCDI 50HP Aircraft Engine is a twin-cylinder, air-cooled, two-stroke powerplant trusted by ultralight and sport aircraft pilots worldwide. With dual ignition for reliability and 50 …

Before operating the engine read operator's manual. Information is available from your local authorité-d For information - without commitment to advise modifications. 3500 — SO 2V 5500 …

Dec 28, 2025 · Details on the ROTAX 503 SERIES aircraft engine, based on current FAA records. Data presented on this website is sourced directly from official Federal Aviation Administration …

Mar 27, 2025 · The Rotax 503 is a 37 kW (50 hp), inline 2-cylinder, two-stroke aircraft engine, built by BRP-Rotax GmbH & Co. KG of Austria for use in ultralight aircraft. The Rotax 503 features …

View and Download Rotax 503 UL operator's manual online. equipped with breakerless dual ignition system and BING carbureto. 503 UL engine pdf manual download.

Congratulations on your decision to use a ROTAX aircraft engine. Before operating the engine, carefully read this Operator's Manual. The Manual provides you with basic information on the …

The Rotax 503 is a 37 kW (50 hp), inline 2-cylinder, two-stroke aircraft engine, built by BRP-Rotax GmbH & Co. KG of Austria for use in ultralight aircraft. [1][2]