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General| Number of Cylinders | 4 |
|---|---|
| Compression Ratio | 8.5:1 |
| Maximum Power | 160 hp (119 kW) at 2700 rpm |
| Fuel Type | Avgas 100LL |
| Firing Order | 1-3-2-4 |
| Ignition System | Dual magneto |
| Bore | 5.125 in (130.2 mm) |
| Stroke | 3.875 in (98.4 mm) |
| Oil Capacity | 8 quarts |
| Engine Type | Horizontally opposed, four-cylinder |
| Displacement | 319.6 cubic inches (5.24 liters) |
Manual details engine operation and maintenance, intended for owners, pilots, and maintenance personnel.
Warnings about neglecting operating instructions, exceeding limitations, and potential for damage or injury.
Publications contain warnings and cautions to minimize injury risk and improper service methods.
Warnings are not all-inclusive; users must ensure their procedures are safe.
Lycoming warrants engines against defects in material/workmanship under normal use.
Lists specifications for specific IO-320 engine models.
Lists specifications for multiple IO-320, AIO-320, and LIO-320 models.
Lists specifications for specific IO-320 engine models.
Lists specifications for specific IO-320 engine models.
General guidelines for long life, economy, and satisfactory engine operation.
Essential maintenance checks before the first flight of the day.
Recommended procedures for starting the engine.
Procedures for running and warming up the engine on the ground.
Steps for performing a thorough ground check of the engine.
Guidance for operating the engine safely and efficiently during flight.
Instructions for proper fuel/air mixture adjustment for economy and performance.
Daily check of aircraft prior to the first flight.
Specific checks for daily pre-flight inspection.
Procedures to guide personnel in performing maintenance operations.
Lists probable causes and remedies for engine start failures.
Lists probable causes and remedies for improper engine idling.
Lists probable causes and remedies for low power and rough running.
Lists probable causes and remedies for inability to achieve full power.
Lists probable causes and remedies for a rough running engine.
Lists probable causes and remedies for low engine oil pressure.
Lists probable causes and remedies for high engine oil temperature.
Lists probable causes and remedies for excessive engine oil consumption.
Lists operational and maintenance limits for the engine.
