# Lycoming O-360

The Lycoming O-360 is a family of four-cylinder, direct-drive, horizontally opposed, air-cooled, piston aircraft engines. Engines in the O-360 series produce between 145 and 225 hp (110 and 170 kW), with the basic O-360 producing 180 hp (130 kW).
The engine family has been installed in thousands of aircraft, including the Cessna 172, Piper Cherokee/Archer, Grumman Tiger, and many home-built types. It has a factory rated time between overhaul (TBO) of 2000 hours or twelve years. O-360 family engines are also widely used in airboats, most notably in the Hurricane Aircats used by the US Army during the Vietnam War.
The first O-360 certified was the A1A model, certified on 20 July 1955 to United States CAR 13 effective March 5, 1952 as amended by 13-1 and 13-2. The Lycoming IO-390 is an O-360 which has had its cylinder bore increased by 3⁄16 inch (4.8 mm), developing 210 hp (160 kW).

## Series

The O-360 family of engines comprises 167 different models with 12 different prefixes. All have a 361 cu in (6 L) displacement and 5.125 and 4.375 in (130 and 111 mm) bore and stroke.
* O-360 carbureted series
* HO-360 horizontally mounted series for helicopter installation
* LO-360 same as O-360, but with left-hand rotating crankshaft, for use in pairs on twin-engined aircraft
* TO-360 turbocharged series
* LTO-360 turbocharged left-hand rotation series
* IO-360 fuel-injected series
* LIO-360 same as IO-360, but with left-hand rotating crankshaft
* AIO-360 inverted mount (dry sump aerobatic) fuel-injected series
* AEIO-360 aerobatic fuel-injected series
* HIO-360 horizontally mounted fuel-injected series for helicopters
* LHIO-360 left-hand rotation, fuel-injected, horizontally mounted for helicopters
* TIO-360 turbocharged and fuel-injected series

## Applications
### O-360

* Aer Lualdi L.55
* Aero Boero AB-180
* Aero Commander Lark Commander
* Aero Concepts Discovery
* American Aviation AA-2 Patriot
* Australian Lightwing SP-4000 Speed
* Aviamilano Nibbio
* Aviat Husky A-1C-180
* Backcountry Super Cubs Mackey SQ2
* Backcountry Super Cubs Supercruiser
* Backcountry Super Cubs Super Cub
* Barrows Bearhawk
* Barrows Bearhawk Patrol
* Beagle Airedale
* Beechcraft Duchess
* Beechcraft Musketeer
* Beechcraft Travel Air
* Bölkow Bo 207
* Brutsche Freedom 180 STOL
* Bushcaddy L-162 Max
* Bushcaddy L-164
* Canadian Home Rotors Safari
* Cessna 172
* Cessna 177
* Collins Dipper
* Cozy MK IV
* CubCrafters Carbon Cub EX
* CubCrafters CC18-180 Top Cub
* Dakota Cub Super 18
* Dean Delt-Air 250
* Diamond DA40
* Dyn'Aéro MCR R180
* Falconar F12A Cruiser
* Glasair GlaStar
* Grinvalds Orion
* Grob G 115
* Grumman American AA-5
* Guimbal Cabri G2
* Hurricane Aircat (airboat)
* IRI T23B
* Javelin Wichawk
* Lambert Mission 212
* Lancair 360
* Lucas L-6B
* Lucas L8
* Maule M-5
* Mooney M20
* Morane-Saulnier MS-893E
* Moynet 360-4 Jupiter
* MSW One
* Murphy Elite
* Mustang Aeronautics Mustang II
* Norman Dube Aerocruiser Plus
* PAC MFI-17 Mushshak
* Peña Bilouis
* Peña Dahu
* Peña Joker
* Piper PA-18 Super Cub
* Piper Cherokee 180
* Piper PA-24-180 Comanche
* Piper PA-44-180 Seminole
* Rihn DR-107 One Design
* Robin Aiglon
* Robin DR.300-180
* Robin DR.400-180
* Robinson R22
* Saab 91 Safir
* Sands Fokker Dr.1 Triplane
* Seabird Seeker
* Schweizer SGM 2-37
* Slepcev Storch
* Stoddard-Hamilton Glasair II
* Turbay T-3
* Ultimate 10-180
* Van's Aircraft RV-6
* Van's Aircraft RV-7
* Van's Aircraft RV-8
* VTOL Aircraft Phillicopter
* Wassmer WA-40
* Wassmer WA-54 Atlantic
* Whisper X350 Generation II
* Zenair CH 640
* Zenith STOL CH 801

### LO-360

* Beechcraft Duchess
* Piper PA-44-180 Seminole

### IO-360

* Adventure Air Adventurer
* AeroCad AeroCanard
* Aircraft Technologies Acro 1
* Australian Lightwing SP-6000
* Aviat Husky A-1C-200
* Beechcraft Musketeer Super III
* Berkut 360
* Brutsche Freedom 210 STOL
* CEI Free Spirit Mk II
* Cessna 172R/172S
* Cessna 177RG
* Commander 112
* Commander 114
* Diamond DA40
* Diamond DA42
* Dream Tundra
* Evektor VUT100-120i Cobra
* Falconar SAL Mustang
* Giles G-200
* Glassic SQ2000
* Lake LA-4-200 Buccaneer
* LFU 205
* Mooney M20
* Mustang Aeronautics Mustang II
* Osprey GP4
* PAC MFI-17 Mushshak
* PAC CT/4
* Partenavia P.68
* Peña Bilouis
* Peña Dahu
* Piper Arrow
* Piper PA-34 Seneca I
* Sawyer Skyjacker II
* Scaled Composites Boomerang
* Skipper Scrappy UAC-200
* Scottish Aviation Bulldog
* Seawind 2000
* SGP M-222 Flamingo
* Socata Tobago TB200XL
* Sorrell Hiperbipe
* Stolp Super Starduster
* Tecnam P2010
* Texas Aircraft Stallion
* Thorp T-18
* Ultimate 10-200
* Van's Aircraft RV-6
* Van's Aircraft RV-7
* Van's Aircraft RV-8
* Wega 180
* Zeppelin NT
* Zlín Z 242

### LIO-360

* Piper PA-34 Seneca I
* Diamond DA42

### AIO-360

* Stephens Akro

### AEIO-360

* Aero-Cam Slick 360
* Aviat Eagle II
* American Champion Super Decathlon
* Extra EA-200
* FFA AS-202 Bravo
* Great Lakes Sport Trainer
* Grob G 115E
* Mudry CAP 10
* Peña Capeña
* Pitts Special
* Tech Aero TR 200
* Valmet L-70 Vinka
* Zlín Z 242

### HIO-360

* Enstrom F-28
* OH-23 Raven
* Schweizer 300

### LHIO-360

* Silvercraft SH-3
* Silvercraft SH-4

## Specifications (O-360-A1A)

Data from Type Certificate Data Sheet E-286

### General characteristics

* Type: Four-cylinder, dual magneto, horizontally opposed, four-stroke aircraft engine
* Bore: 5.125 in (130 mm)
* Stroke: 4.375 in (111 mm)
* Displacement: 361 cu in (5.9 L)
* Dry weight: 258 lb (117 kg)

### Components

* Fuel type: 91/96 avgas minimum grade
* Oil system: 8 US qt (8 L) wet sump
* Cooling system: air-cooled

### Performance

* Power output: 180 hp (130 kW) at 2700 rpm
* Compression ratio: 8.5:1
* Fuel consumption: 7.8 US gal (30 L) to 9 US gal (34 L) per hour