Lycoming O-235 Series Aircraft Engine 108-125 HP

Basic Information

Place of Origin:	America
Brand Name:	Lycoming
Certification:	FAA 8130-3
Model Number:	Lycoming O-235 Series Aircraft Engine

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Lycoming O-235 Series Engine

O-235 Series Aircraft Engine

Lycoming O-235 Series Aircraft Engine

The Lycoming O-235 series is a family of air-cooled, horizontally opposed, four-cylinder aircraft engines produced by Lycoming Engines. These engines are widely used in general aviation, particularly in light aircraft, trainers, and homebuilt planes. The O-235 series is known for its reliability, simplicity, and versatility, making it one of the most popular engines in its class.

Part Numbers

Model	New	Rebuilt	Overhaul
O-235-C1	ENPL-9057	RENPL-9057	HENPL-9057
O-235-C1	ENPL-9080	RENPL-9080	HENPL-9080
O-235-C1	ENPL-9091	RENPL-9091	HENPL-9091
O-235-C1B	ENPL-9036	RENPL-9036	HENPL-9036
O-235-C1B	ENPL-9084	RENPL-9084	HENPL-9084
O-235-C2A	ENPL-9039	RENPL-9039	HENPL-9039
O-235-C2A	ENPL-9044	RENPL-9044	HENPL-9044
O-235-C2A	ENPL-9102	RENPL-9102	HENPL-9102
O-235-C2C	ENPL-9015	RENPL-9015	HENPL-9015
O-235-C2C	ENPL-9082	RENPL-9082	HENPL-9082
O-235-F2B	ENPL-9418	RENPL-9418	HENPL-9418
O-235-H2C	ENPL-6457	RENPL-6457	HENPL-6457
O-235-H2C	ENPL-9006	RENPL-9006	HENPL-9006
O-235-H2C	ENPL-9104	RENPL-9104	HENPL-9104
O-235-J2A	ENPL-9023	RENPL-9023	HENPL-9023
O-235-K2B	ENPL-9029	RENPL-9029	HENPL-9029
O-235-K2C	ENPL-6481	RENPL-6481	HENPL-6481
O-235-K2C	ENPL-9069	RENPL-9069	HENPL-9069
O-235-L2A	ENPL-6427	RENPL-6427	HENPL-6427
O-235-L2A	ENPL-9016	RENPL-9016	HENPL-9016
O-235-L2A	ENPL-9037	RENPL-9037	HENPL-9037
O-235-L2A	ENPL-9065	RENPL-9065	HENPL-9065
O-235-L2C	ENPL-6397	RENPL-6397	HENPL-6397
O-235-L2C	ENPL-6403	RENPL-6403	HENPL-6403
O-235-L2C	ENPL-6475	RENPL-6475	HENPL-6475
O-235-L2C	ENPL-6479	RENPL-6479	HENPL-6479
O-235-L2C	ENPL-9005	RENPL-9005	HENPL-9005
O-235-N2A	ENPL-9031	RENPL-9031	HENPL-9031
O-235-N2C	ENPL-6476	RENPL-6476	HENPL-6476
O-235-N2C	ENPL-9071	RENPL-9071	HENPL-9071
O-235-N2C	ENPL-9106	RENPL-9106	HENPL-9106

Key Features

Configuration: Horizontally opposed (flat-four) cylinder arrangement
Air-cooled design
Displacement: 235 cubic inches (3.85 liters)
Power Output: 108 to 125 horsepower at 2,600-2,800 RPM (model dependent)
Fuel System: Available in carbureted (O-235) and fuel-injected (IO-235) versions; runs on 100LL avgas
Weight: Approximately 244-260 pounds (111-118 kg) dry weight
Compression Ratio: Typically 7.0:1 or 8.5:1 (variant dependent)
Propeller Drive: Direct drive (non-geared) configuration

Popular Models

O-235-C: 108 HP; used in early Cessna 152 models
O-235-L2C: 110 HP; commonly found in Piper PA-38 Tomahawk
O-235-N2C: 108 HP; used in later Cessna 152 models
O-235-F: 115 HP; used in experimental and homebuilt aircraft

Advantages

Reliability: Proven design with decades of service in general aviation
Simplicity: Easy to maintain and repair compared to more complex engines
Versatility: Suitable for a wide range of light aircraft
Cost-Effective: Lower operating and maintenance costs

Applications

Training Aircraft: Widely used in flight schools
Light Sport Aircraft: Cessna 152 and Piper Tomahawk
Experimental/Homebuilt Aircraft: Popular for its simplicity and affordability

The Lycoming O-235 series remains a cornerstone of general aviation, offering a balance of reliability, simplicity, and affordability. It is an excellent choice for trainers, light aircraft, and homebuilt planes, making it one of the most widely used aircraft engines in the world.

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