ROTAX 582 UL 65 HP Aircraft Engine

The ROTAX 582 UL is a lightweight 65 HP, 2-stroke aircraft engine renowned for its simplicity, reliability, and strong power-to-weight ratio. Widely used in ultralight aircraft, gyrocopters, and light sport aviation, this engine has become a trusted choice for pilots and manufacturers who value proven performance and straightforward maintenance.

Designed with a liquid-cooled cylinder head and air-cooled cylinders, the ROTAX 582 UL maintains stable operating temperatures even under demanding flight conditions. Its dual independent ignition system enhances operational safety and ensures smooth, consistent engine performance, while the carbureted fuel system keeps the design simple and easy to service in the field.

With a compact layout and low overall weight, the ROTAX 582 UL allows excellent aircraft balance and payload efficiency. The engine delivers responsive throttle control and reliable power output, making it well-suited for training aircraft, recreational flying, and experimental aviation projects. Its long track record in the aviation market reflects ROTAX’s commitment to durability and dependable engineering.

Ideal for pilots seeking a cost-effective, well-established aircraft engine, the ROTAX 582 UL 65 HP offers dependable power, ease of operation, and versatility across a wide range of light aviation applications.

• 65 HP 2-Stroke Aircraft Engine – Strong power-to-weight ratio ideal for ultralight and light sport aircraft

• Liquid-Cooled Cylinder Head – Maintains stable engine temperature and reliable performance

• Air-Cooled Cylinders – Simple design with effective heat dissipation

• Dual Independent Ignition System – Enhanced safety and smooth engine operation

• Carbureted Fuel System – Easy maintenance and proven reliability

• Lightweight & Compact Design – Improves aircraft balance and payload capacity

• Responsive Throttle Performance – Smooth power delivery for training and recreational flying

• Proven ROTAX Reliability – Widely used and trusted in ultralight and experimental aviation

Key Benefits — ROTAX 582 UL 65 HP Aircraft Engine

• Excellent Power-to-Weight Ratio – Delivers strong performance without adding excess weight to the aircraft

• Reliable Temperature Control – Liquid-cooled head helps prevent overheating and ensures consistent operation

• Enhanced Flight Safety – Dual ignition system provides redundancy and dependable engine running

• Easy Maintenance – Simple 2-stroke, carbureted design reduces service complexity and downtime

• Cost-Effective Operation – Lower acquisition and maintenance costs compared to larger aircraft engines

• Versatile Application – Suitable for ultralight aircraft, gyrocopters, and experimental aviation

• Proven Track Record – Long-standing use in the aviation industry with a reputation for dependability

Technical Specifications

Engine Type

• Twin-cylinder, two-stroke, liquid-cooled aircraft engine with rotary valve intake and dual electronic ignition.

Performance

• Maximum Power: 65 HP (48 kW) @ 6500 RPM.

• Maximum Torque: 75 Nm (55.3 ft-lb) @ 6000 RPM.

• Maximum RPM: 6800 RPM.

Dimensions & Displacement

• Bore: 76.0 mm (2.99 in).

• Stroke: 64.0 mm (2.52 in).

• Displacement: 580.7 cm³ (35.44 cu in).

Weight (dry, standard configuration)

• Engine: ~29.1 kg (64 lb).

• Exhaust System: ~5.1 kg (11.2 lb).

• Carburetors (2): ~1.8 kg (4 lb).

• Electric Starter (optional): ~3.5 kg (7.7 lb).

• Reduction Gearbox Units: Various options (weights depend on ratio and type).

Cooling System

• Liquid-cooled cylinder head and cylinders with integrated water pump and thermostat for stable operating temperatures.

Ignition & Fuel

• Dual electronic ignition system for redundancy and smooth operation.

• Fuel System: Carburetors (dual) with options for mechanical fuel pump; compatible with unleaded automotive fuels, AVGAS 100LL, and ethanol blends as specified by manufacturer.

• Oil/Fuel Mix: Two-stroke oil mixed with fuel per recommended ratio (typically 50:1 or as per manual).

Propeller Drive

• Propeller speed reduction unit (PRSU): Available in several gear ratios (e.g., 2.58, 3.0, 3.47, or 4.0:1) to match different propeller and aircraft needs.

Typical Applications

• Ultralight aircraft, experimental aircraft, gyrocopters, and light sport aviation using Visual Flight Rules (VFR).