Name: Rotax OM-912
Brand: Rotax
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Performance data

Engine 912 S/ULS

Performance data for variable pitch propeller

Engine speed over 5500 rpm is restricted to 5 minutes.

Run the engine in accordance with the following table.

Power

setting

Engine

speed

(rpm)

Perform-

ance (kW)

/ (HP)

Torque

(Nm) / (ft.

lb)

Manifold

pressure

(in.Hg)

Take-off

power

5800 73.5 / 100 121.0 /

89.24

27.5

Max. contin-

uos power

5500 69.0 / 90 119.8 /

88.36

75 % 5000 51.0 / 68 97.4 /

71.84

65 % 4800 44.6 / 60 88.7 /

65.42

55 % 4300 38.0 / 50 84.3 /

62.17

NOTE

Further essential information regarding engine behavior see

Service Letter SL-912-016, latest edition.

Page 5-6

November 01/2016

BRP-Rotax Effectivity: 912 Serie

Edition 4 / Rev. 0

Table of Content3
Introduction5
List of Effective Pages7
Table of Amendments9
Summary of Amendments10
Table of Contents11
General Note11
General12
Engine Serial Number12
Abbreviations and Terms13
- Measurement17
- Symbols Used17
Safety17
- Training19
- Use for Intended Purpose19
Safety Information19
- Instrumentation20
- Engine Log Book20
- Maintenance20
- Regulations20
- Vacuum Pump21
- Technical Documentation22
- Status22
Standard Version24
Auxiliary Equipment (Optional)24
Type Description26
- Side View27
- Top View27
Engine Components, Engine Views, Cylinder Designation27
Front View28
Technical Data28
Fuel Consumption28
Normal Direction of Propeller Rotation (Engine)29
Direction of Rotation29
- Operating Instructions31
- Oil Pressure32
- Operating Limits (912 A/F/UL)32
  - Performance32
  - Speed32
  - Coolant Temperature: (Coolant Exit Temperature)33
  - Cylinder Head Temperature33
  - Exhaust Gas Temperature33
  - Waterless Coolant33
  - Fuel Pressure34
  - Power Consumption of the External Alternator34
  - Power Consumption of the Hydraulic Propeller Governor34
  - Power Consumption of the Vacuum Pump34
  - Acceleration35
  - Oil Temperature35
- Operating Limits (912 S/ULS)35
- Operating Media-Coolant38
  - Antiknock Properties39
  - Avgas39
  - Mogas39
  - Operating Media – Fuel39
  - Oil Consumption40
  - Oil Type40
  - Oil Viscosity40
- Operating Media-Lubricants40
  - Temperature Range41
  - Standard Operation43
  - Coolant Level44
- Daily Checks44
  - Expansion Tank45
  - Overflow Bottle45
  - Carburetor46
  - Exhaust System46
  - Gear Box46
  - Mech./Electronic Components46
- Before Engine Start47
  - Oil Level47
  - Pre-Flight Check47
- Engine Start48
- To Observe49
- After Engine Start50
  - Ignition Check50
  - Throttle Response50
  - Warming up50
  - Climb51
- Cruising51
- Take-Off51
- Cold Weather Operation52
- Engine Shut-Off52
  - Remedy - Cold Start52
  - Abnormal Operation55
- Exceeding Max. Admissible Engine Speed57
- Exceeding of Max. Admissible Cooling System Temperature57
- Exceeding of Max. Admissible Cyl. Head Temperature57
- Re-Start During Flight57
- Exceeding of Max. Admissible Coolant Temperature58
- Exceeding of Max. Admissible Oil Temperature58
- Oil Pressure/Fuel Pressure58
- Engine on Fire or Fire in the Engine Compartment59
- Oil Pressure above Permitted Range at Low Ambient59
- Oil Pressure below Minimum - on Ground59
- Temperatures59
- Trouble Shooting60
- Engine Keeps Running with Ignition off60
- Starting Problems60
- Engine Does Not Start60
- Low Oil Pressure61
- High Oil Pressure61
- Oil Level Is Increasing61
- Cold Engine Start62
- Engine Hard to Start at Low Temperature62
- Performance and Fuel Consumption63
- Performance Data64
- Performance Graphs for Stand. Conditions (ISA)64
- Performance Graphs 912 A/F/UL64
- Values Along Propeller Curve64
- Performance Data for Variable Pitch Propeller65
- Performance Data Variable Pitch Propeller65
- Performance Graphs for Standard. Conditions (ISA)67
- Performance Graphs Engine 912 S/ULS67
- Performance Graph for Non Standard Conditions69
- Performance Graph69
- Weights71
- Weights – Engine71
- Weight – Accessories71
- System Description73
- Cooling System74
- Coolant Flow74
- Coolant Temperature Measuring74
- Fuel System76
- Return Line76
- Oil Temperature Sensor77
- Crankcase77
- Lubrication System77
- Electric System78
- Charging Coils78
- Ignition Circuit78
- Propeller Gearbox79
- Reduction Ratio79
- Overload Clutch79
- Torsional Shock Absorber80
- Backlash80
- Vacuum Pump or Hydraulic Governor80
- Preservation and Storage81
- Engine Preservation and Storage82
- Engine Back to Operation83
- Supplement85
- List of Figures89

Rotax OM-912 User Manual

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Brand	Rotax
Model	OM-912
Category	Engine
Language	English