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ROTAX 914 UL

Engine 914 UL

4- stroke, 4-cylinder liquid/air cooled engine with opposed cylinders, dry sump forced lubrication with separate oil tank, automatic adjustment by hydraulic valve tappets, with turbocharger and automatic waste gate control, integrated reduction gearbox.

non certified
conforms to ASTM 2339-04 LSA

Download

  1. Data sheets
  2. Performance diagrams
  3. Drawings

Technical data

Version Performance Torque Max RPM
  kW ft. lb. 1/min Nm ft. lb. l/min l/min
912 F/UL 84.5 115 5800 144 106 4900 5800
Bore Stroke Displacement Fuel
79.5 mm 3.33 in 61 mm 2.4 in 1211.2 cm³ 73.91 cu in. min. MON 85 RON 95*
min. AKI 91*

* - leaded, unleaded, AVGAS 100 LL or Ethanol 10
see Service Instruction SI-912-016/914-019 „Selection of suitable operating fluids”, current issue

WEIGHT kg lb
engine with gearbox i = 2.43 64.0 140.8
overload clutch 1.7 3.7
radiator 1.0 2.2
oil radiator 0.5 1.1
2 air filters 0.3 0.66
airbox 1.3 2.86
exhaust system 4.0 8.8
air guide baffle 0.8 1.76
engine suspension frame 2.0 4.4
vacuum pump 0.8 1.8
hydraulic governor 2.7 5.9
external alternator 3.0 6.6

Standard configuration

version UL 2
(for fixed pitch propeller)

  1. integrated reduction gearbox i = 2,43
  2. electric starter standard + starter relay
  3. electronic dual ignitron system
  4. ignitron cover
  5. R.F.I. suppression
  6. regulator-rectifier
  7. 2 carburetors with stainless steel fuel lines
  8. turbocharger with electronic controlled waste gate
  9. 2 external electric 12 V fuel pumps
  10. engine thruss assembly without silent blocks
  11. stainless steel exhaust system
  12. expansion tank
  13. oil filter, oil tank, without tubes
  14. coolant pump and internal hoses
  15. 2 sensors for cylinder head temperature
  16. 1 sensor for oil temperature
  17. 1 oil pressure sensor (current type, Honeywell)

version UL 3
(for „constant speed” propellers, controlled hydraulically)

Configuration same as for version 2 additionally equipped with:

  1. drive for hydraulic governor and cover for sealing of governor flange
  2. overload clutch for reduction gearbox

Download - technical instructions

Here you can free download current issues of main technical instructions. For other technical publications see DOCUMENTATION.

The documents are available and may be downloaded in Adobe pdf format. If you encounter difficulties with the pdf-files, make sure to have the latest updates installed for your version of Adobe® Reader®.

  1. Installation Manual
  2. Operators Manual
  3. Maintenance Manual (Line)
  4. Drawings – electronic version of DMU is available on CDrom at our company. Please call us for details.
ROTAX 914 UL