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ROTAX 912 UL

Engine 912 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, 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 A/F/UL 59.6 80 5800* 103 75.9 4800 5800
Bore Stroke Displacement Fuel
79.5 mm 3.13 in 61 mm 2.4 in 1211.2 cm³ 73.91 cu in. min. MON 85 RON 95**
min. AKI 87**

* - max 5 min.
** - 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 = 2.27 55.4 122.0
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=2.27, optionally i=2.43 possible
  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
  8. mechanical fuel pump
  9. expansion tank
  10. exhaust sockets In stainless steel
  11. oil filter, oil tank, without tubes
  12. coolant pump and internal hoses
  13. 2 sensors for cylinder head temperature
  14. 1 sensor for oil temperature
  15. 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. Performance diagrams
  5. Drawings – electronic version of DMU is available on CDrom at our company. Please call us for details.
ROTAX 912 UL