The Lycoming IO-360 is a family of four-cylinder, horizontally opposed, air-cooled, fuel-injected aircraft engines. It is a popular choice for general aviation aircraft due to its reliability, efficiency, and performance.

Part Number

Key Features of the Lycoming IO-360 Series

1.Engine Type:

Horizontally opposed, four-cylinder, four-stroke, air-cooled engine.

Fuel-injected (as opposed to carbureted models like the O-360).

2.Displacement:

361 cubic inches (5.9 liters).

3.Power Output:

Typically produces 180–200 horsepower at 2,700 RPM, depending on the specific variant.

4.Fuel System:

Fuel-injected, which provides better fuel efficiency, smoother operation, and improved performance at higher altitudes compared to carbureted engines.

5.Weight:

Dry weight is approximately 258–280 pounds (117–127 kg), depending on the model and accessories.

6.Applications:

Commonly used in high-performance light aircraft, including the Cirrus SR20, Mooney M20, and Piper PA-28R Arrow.

Variants of the Lycoming IO-360 Series

The IO-360 series includes several variants, each designed for specific performance or installation requirements. Some notable variants include:

1.IO-360-A1A:

Produces 180 HP.

Used in aircraft like the Piper PA-28R Arrow.

2.IO-360-B1A:

Produces 180 HP.

Used in the Mooney M20 series.

3.IO-360-C1A:

Produces 180 HP.

Used in the Cirrus SR20.

4.IO-360-M1A:

Produces 200 HP.

High-performance variant used in experimental and homebuilt aircraft.

Performance and Specifications

Compression Ratio: 8.5:1 (standard models).

Fuel Type: Aviation gasoline (100LL or equivalent).

Oil Capacity: Approximately 8 quarts (7.6 liters).

Cooling System: Air-cooled with baffling for efficient heat dissipation.

Advantages of the IO-360

1.Fuel Injection:

Provides better fuel efficiency and performance, especially at higher altitudes.

Reduces the risk of carburetor icing.

2.Reliability:

Known for its durability and long service life.

Widely used in both certified and experimental aircraft.

3.Smooth Operation:

Fuel injection ensures smoother engine operation and better throttle response.

4.Versatility:

Suitable for a wide range of aircraft, from trainers to high-performance singles.

Maintenance and Reliability

• The IO-360 is designed for ease of maintenance, with many parts and components readily available.
• Regular maintenance includes oil changes, spark plug replacement, and inspection of the fuel injection system.
• Time Between Overhaul (TBO): Typically 2,000 hours or 12 years, depending on usage and maintenance practices.

Common Aircraft Using the Lycoming IO-360

• Cirrus SR20 (IO-360-C1A)
• Mooney M20 series (IO-360-A1A, IO-360-B1A)
• Piper PA-28R Arrow (IO-360-A1A)
• Diamond DA40 (10-360-M1A)
• Cessna 172 (10-360-L2A)
• Experimental and homebuilt aircraft (e.g., Van's RV series).

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