Lycoming O-360 Series Aircraft Engine
The Lycoming O-360 is a four-cylinder, horizontally opposed, air-cooled aircraft engine that is widely regarded as one of the most popular and reliable engines in general aviation. It is an evolution of the O-320 series, offering increased power and performance.
Part Number
| Model |
New |
Rebuilt |
Overhaul |
| O-360-A1A |
ENPL-RT8435 |
RENPL-RT8435 |
HENPL-RT8435 |
| O-360-A1A |
ENPL-RT8597 |
RENPL-RT8597 |
HENPL-RT8597 |
| O-360-A1A |
ENPL-RT8681 |
RENPL-RT8681 |
HENPL-RT8681 |
| O-360-A1A |
ENPL-RT8683 |
RENPL-RT8683 |
HENPL-RT8683 |
| O-360-A1A |
ENPL-RT8788 |
RENPL-RT8788 |
HENPL-RT8788 |
| O-360-A1A |
ENPL-RT9778 |
RENPL-RT9778 |
HENPL-RT9778 |
Key Specifications
- Type: Four-cylinder, horizontally opposed (flat-four), air-cooled
- Displacement: 361 cubic inches (5.9 liters)
- Power Output: Typically produces 180 horsepower (depending on the specific model and configuration)
- Compression Ratio: Varies by model, typically 8.5:1
- Weight: Approximately 258 to 280 pounds (dry weight, depending on the model)
- Fuel Type: Aviation gasoline (100LL or lower-octane fuels, depending on the model)
- Cooling: Air-cooled
- Ignition System: Dual magnetos for redundancy
- Redline RPM: Typically 2,700 RPM
Applications
The O-360 engine is used in a wide range of general aviation aircraft, including:
- Cessna 172 (later models)
- Piper PA-28 Cherokee
- Piper PA-32 Cherokee Six
- Grumman American AA-5
- Van's RV series (experimental aircraft)
- Aeronca Champion
- Mooney M20
Variants
The O-360 series includes several models, each tailored for specific applications or aircraft. Some notable variants include:
- O-360-A1A: 180 hp, used in the Cessna 172 and Piper PA-28.
- O-360-A1D: 180 hp, used in the Piper PA-28 and other aircraft.
- O-360-A1G6: 180 hp, with a higher compression ratio for improved performance.
- O-360-C1A: 180 hp, used in helicopters, such as the Bell 47.
- O-360-E1A: 180 hp, used in the Mooney M20.
- O-360-F1A: 180 hp, used in the Grumman American AA-5.
Features
- Reliability: Known for its durability and long service life when properly maintained.
- Simplicity: The engine's design is straightforward, making it easier to maintain and repair.
- Versatility: Used in both certified and experimental aircraft.
- Dual Magneto System: Provides redundancy for improved safety.
Advantages
- Proven design with decades of reliable service.
- Wide availability of parts and support.
- Suitable for a variety of aircraft types.
The Lycoming O-360 remains a cornerstone of general aviation due to its reliability, simplicity, and widespread use. It continues to power many training and recreational aircraft worldwide.
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