Rotax 447 UL
Rotax 503 UL
Rotax 582 UL
Rotax 912 UL
Rotax 912 ULS
Rotax 914 UL

Shown here with external alternator, hydraulic propeller governor and air guide baffles.

Rotax 914 UL DCDI 115HP

  • 4-stroke turbocharged engine specially developed for recreational aircraft. Also exists in a certified version: Rotax 914 F.
  • 4 horizontally opposed cylinders, "boxer" configuration
  • Free air cooled cylinders, liquid cooled cylinder heads with integrated pump and expansion tank
  • Dry sump forced lubrication with integrated pump and separate oil tank
  • 8 valves, automatic adjustment by hydraulic valve tappet
  • Dual Capacitor Discharge Ignition (DCDI) with RFI noise suppression
  • Garrett turbocharger with automatic waste gate control
  • Two Bing Constant Depression (CD) carburetors
  • Two electric fuel pumps
  • Integrated electric starter
  • Integrated reduction gearbox, ratio of 2.43:1 with optional slipper clutch
  • Various liquid and oil radiators available
  • Many option available such as: Vacuum pump, external alternator, hydraulic propeller governor
  • Operates on automotive fuel with a minimum octane rating of 91 (Canadian standards)
  • Time Between Overhauls (TBO): 1200 hours*


Maximum Power
(5 minutes)
115HP / 84.5KW @ 5800 RPM
Maximum Power (sustained) 100HP / 73.5KW @ 5500 RPM
Maximum Torque 106ft-lb / 144NM @ 4900 RPM

Combustion Chambers

Bore 3.13" / 79.5mm
Stroke 2.40" / 61.0mm
Displacement / 1211.2cm
Compression ratio 9.0:1


Engine with Carburetors 141.1lbs / 64.0Kg
Exhaust System 8.8lbs / 4.0Kg
Air Filter 0.4lbs / 0.2Kg
Liquid Radiator 2.2lbs / 1.0Kg
Oil Radiator 1.1lbs / 0.5Kg
Engine truss assembly 4.4lbs / 2.0Kg
Regulator-Rectifier 0.2 lbs / 0.1Kg
Electric Fuel Pumps 1.5lbs / 0.7Kg
External Alternator 6.6lbs / 3.0Kg
Installed Weight 166.4lbs / 75.5Kg
Weight/Power Ratio 1.45lbs/HP / 0.88Kg/KW


Information Sheet 914info.pdf / 406Kb / Adobe Acrobat format
Performance Graphs 914perf.pdf / 14Kb / Adobe Acrobat format
Technical Drawings 914draw.pdf / 311Kb / Adobe Acrobat format
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Service Documentation Visit