Rotax 582 UL DCDI 65HP

by Michael A. Anderson

Rotax 582 UL DCDI 65HP

Blue cylinder head, model 99

  • 2-stroke engine specially developed for recreational aircraft
  • 2 cylinders, liquid cooled
  • Rotary valve intake
  • Dual capacitor discharge Ignition (DCDI)
  • Dual Bing carburetors
  • Mikuni pulse driven diaphragm fuel pump
  • Recoil or electric starter
  • Available with various exhaust system configurations
  • Available with engine-mounted radiator kits
  • Operates on automotive fuel with a minimum of 87 octane rating (Canadian standards) and super 2-stroke oil of API-TC classification, automatically provided by oil injection, or premixed with a 50:1 ratio
  • Time Between Overhauls (TBO): 300 hours


Maximum power 65HP / 48KW @6500 RPM
Maximum torque 55.3ft-lb / 75NM @6000 RPM
Maximum RPM 6800 RPM

Combustion chambers

Bore 2.99″ / 76.0mm
Stroke 2.25″ / 64.0mm
Displacement / 580.7cm³
Compression ratio Theoretical: 11.5
Effective: 5.75


Engine with carburetor(s) 64.4lbs / 29.2Kg
Exhaust system 11.2lbs / 5.1Kg
Air filter 0.7lbs / 0.3Kg
Dual radiator kit 6.0lbs / 2.7Kg
No gearbox, no electric starter 82.2lbs / 37.3Kg
B gearbox,
no electric starter
92.1lbs / 41.8Kg
B gearbox,
electric starter
102.9lbs / 46.7Kg
C gearbox,
no electric starter
99.8lbs / 45.3Kg
C gearbox,
electric starter
110.6lbs / 50.2Kg
E gearbox 106.9lbs / 48.5Kg


Information sheet 582info.pdf / 428Kb / Adobe Acrobat format
Performance graphs 582perf.pdf / 19Kb / Adobe Acrobat format
Technical drawings 582draw.pdf / 376Kb / Adobe Acrobat format
Service documentation