Manufacturer:
BRP-Rotax GmbH & Co KG
Engine Type:
Four-stroke, four-cylinder, horizontally opposed, turbocharged, liquid-cooled
Displacement:
1211 cc (73.9 cu in)
Production Years:
1996 to present
914 UL:
Non-certified ultralight and experimental aircraft use, rated 80 hp continuous / 115 hp takeoff
914 F:
Certified version for light sport and certified aircraft, rated 80 hp continuous / 115 hp takeoff
914 iS:
Fuel-injected variant, rated 80 hp continuous / 115 hp takeoff
Document Type:
Maintenance and service manual
Format:
PDF (instant download)
Target Audience:
Light sport and ultralight aircraft owners, pilots, and certified aviation maintenance technicians
Competitive Advantage:
Factory-derived maintenance procedures, torque specifications, and troubleshooting flowcharts specific to the 914 turbocharged engine.
Key Features:
Comprehensive coverage of turbocharger, cooling system, fuel system, and electronic engine management.
Purpose:
Definitive resource for operation, maintenance, and servicing of the Rotax 914 engine.
Content Overview:
Essential maintenance procedures, troubleshooting guides for common issues, and technical specifications.
Coverage Areas:
Engine mechanical, lubrication, cooling, fuel, ignition, turbocharger, electrical, and propeller interface.
Page Count:
Approximately 300 pages
Manual Type:
Maintenance and service manual
Delivery Method:
Instant download
Engine Mechanical:
Crankcase, crankshaft, connecting rods, pistons, cylinders, cylinder heads, valve train, and timing gears.
Lubrication System:
Oil pump, oil filter, oil cooler, oil tank, and oil lines.
Cooling System:
Coolant pump, radiator, thermostat, expansion tank, and cooling fans.
Fuel System:
Carburetors (914 UL/F) or fuel injection (914 iS), fuel pump, fuel filter, and fuel lines.
Ignition System:
Dual electronic ignition, trigger coils, ignition coils, spark plugs, and ignition wires.
Turbocharger System:
Turbocharger, wastegate, intercooler, and associated plumbing.
Electrical System:
Charging system, starter, battery, wiring harness, and sensors.
Propeller Interface:
Propeller gearbox, slipper clutch, and propeller flange.
Maintenance Procedures:
Routine inspections, scheduled maintenance, and component replacement.
Troubleshooting:
Diagnostic charts for common engine issues and fault codes.
Adjustments:
Valve clearance, carburetor synchronization, idle speed, and turbo boost adjustments.
Disassembly and Assembly:
Step-by-step procedures for major components.
Testing and Inspection:
Compression tests, leak-down tests, and electrical system checks.
Specifications:
Torque values, clearances, wear limits, and fluid capacities.
Diagrams:
Exploded views, wiring schematics, and system flowcharts.
Parts Information:
Part numbers for common wear items and assemblies.
Part Numbers:
Included for serviceable components.
Ordering Information:
N/A - refer to authorized Rotax distributors.
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Engine Type:
Four-stroke, four-cylinder, horizontally opposed, turbocharged, liquid-cooled
Bore x Stroke:
79.5 mm x 61 mm
Maximum Continuous Power:
80 hp (59.6 kW) at 5500 RPM
Maximum Takeoff Power:
115 hp (85.7 kW) at 5800 RPM (5-minute limit)
Maximum Torque:
144 Nm (106 lb-ft) at 4900 RPM
Maximum RPM:
5800 RPM (takeoff), 5500 RPM (continuous)
Fuel Type:
Mogas 95 RON minimum or AVGAS 100LL
Fuel Delivery:
Dual carburetors (914 UL/F) or electronic fuel injection (914 iS)
Fuel Consumption:
Approximately 15-20 L/h at cruise
Type:
Integrated reduction gearbox with slipper clutch
Reduction Ratio:
2.43:1 (standard)
Lubrication:
Engine oil (shared with engine)
Features:
Slipper clutch to protect engine from propeller shock loads.
Optional Ratios:
Available in 2.27:1 and 2.58:1 for specific applications.
Propeller Flange:
Standard SAE 1 flange or Rotax-specific flange.
Length:
Approximately 600 mm (23.6 in)
Width:
Approximately 580 mm (22.8 in)
Height:
Approximately 500 mm (19.7 in)
Dry Weight:
Approximately 64 kg (141 lb) with gearbox and turbocharger
Curb Weight:
N/A - not applicable to engine
Gross Weight:
N/A - not applicable to engine
Type Certification:
EASA CS-23 and FAA Part 33 (for 914 F variant)
Crash Test Ratings:
N/A - not applicable to engine
Engine Monitoring:
Sensors for oil pressure, oil temperature, coolant temperature, and turbo boost.
Overboost Protection:
Wastegate and electronic boost control to prevent overboost.
Dual Ignition:
Independent ignition circuits for redundancy.
Slipper Clutch:
Protects engine from propeller overload.
Ignition System:
Dual electronic ignition with automatic timing advance.
Fuel Injection:
Electronic fuel injection (914 iS only).
Turbocharging:
Turbocharger with intercooler and wastegate.
Analog Gauges:
Oil pressure, oil temperature, coolant temperature, and tachometer.
Digital Displays:
Optional engine monitors for RPM, boost, and temperatures.
Initial 25-Hour Inspection:
Perform after first 25 hours of operation.
100-Hour Inspection:
Every 100 hours or annually, whichever comes first.
200-Hour Inspection:
Every 200 hours, including carburetor synchronization and valve clearance check.
400-Hour Inspection:
Every 400 hours, including replacement of wear items.
Overhaul Interval:
Recommended at 1200 hours or 10 years.
Engine Oil:
SAE 5W-30 or 10W-40 API SG or higher, or Rotax-specific oil.
Coolant:
50/50 mix of ethylene glycol and water, or Rotax-approved coolant.
Fuel:
Mogas 95 RON minimum or AVGAS 100LL
Common Wear Items:
Spark plugs, oil filter, air filter, carburetor diaphragms, and coolant hoses.
Troubleshooting:
Manual includes diagnostic charts for rough running, overheating, and low oil pressure.
Manufacturer:
BRP-Rotax GmbH & Co KG, Austria
Specialization:
Aircraft engines, recreational vehicles, and industrial engines.
914 UL:
Initial ultralight variant.
914 F:
Certified variant introduced in 1998.
914 iS:
Fuel-injected variant introduced in 2006.
Manufacturing Plant:
Gunskirchen, Austria