- Holder
- Lycoming Engines
- Revision
- 22
- Revised
- April 30, 2013
- Status
- Current
- Product
- Engine
- Certification basis
- CAR 13
- Models
- 60
- Registered
- 28,834 aircraft
The release keeps the latest revision of each data sheet. Model names are as the data sheet lists them.
On this page
Models · 60
| Model | Also known as | Note |
|---|---|---|
| O-320-H3BD | Formerly Textron Lycoming | |
| O-320-D2G | Formerly Textron Lycoming | |
| O-320-E2G | Formerly Textron Lycoming |
Airworthiness directives · 44
ADs whose products are models on this data sheet, matched by model and maker.
AD 2026-04-11Engine (Reciprocating)AD 2022-16-03Engine (RECIPROCATING)AD 2017-16-11Reciprocating Engine Power Section
See all 44 ADsRegistered aircraft
Registry models that point at this data sheet, with their registered aircraft.
Lycoming 0-320 series27,057 registered aircraftLycoming O-320-E2D258 registered aircraftLycoming O-320 series256 registered aircraft
See all 69 registry modelsSTCs approved under this data sheet · 70
STC SE04651CHTo allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22STC SE00825WIInstallation of Specialty Products Spin-on oil filter on Lycoming Engines.STC SE2932SWInstall carburetor air temperature indicator. Approved for Aircooled Motors (Franklin Engine Co.) equipped with float carburetors. Model eligibility included here may not be inclusive.
See all 70 STCsWhat the data sheet says
From the PDF’s text layer, line by line: tables lose their columns. The PDF is the record.
Page No. 01 02 03 04 05 06 07
Rev. No. 22 22 16 16 20 14 17
DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINISTRATION
E-274
Revision 22
Lycoming Engines
O-320-A1A, -A1B, -A2A, -A2B, -A2C, -A2D, -A3A, -A3B,
-A3C, -B1A, -B1B, -B2A, -B2B, -B2C, -B3A, -B3B, B3C,
-B2D, -B2E -C1A, -C1B, -C2A, -C2B, -C2C, -C3A, -C3B,
-C3C, -D1A, -D1B, -D1C, -D1D, -D1F, -D2A, -D2B, -D2C,
-D2F, -D2G, -D2H, -D2J, -D3G, -E1A, -E1B, -E1C, -E1F,
-E1J, -E2A, -E2B, -E2C, -E2D, -E2F, -E2G, -E2H, -E3D,
-E3H, -H1AD, -H1BD, -H2AD, -H2BD, -H3AD, -H3BD
April 30, 2013
TYPE CERTIFICATE DATA SHEET NO. E-274
Engines of models described herein conforming with this data sheet, (which is part of type certificate No. 274) and other
approved data on file with the Federal Aviation Administration, meet the minimum standards for use in certificated aircraft in
accordance with pertinent aircraft data sheets and applicable portions of the Civil Air Regulations/Federal Aviation Regulations
provided they are installed, operated, and maintained as prescribed by the approved manufacturer's manuals and other approved
instructions.
Type Certificate Holder Lycoming Engines
An Operating Division of AVCO Corporation
Williamsport, Pennsylvania 17701
Type Certificate Holder Record Textron Lycoming/Subsid iary of Textron, Inc. transferred TC E-274 to Lycoming
Engines, An Operating Division of AVCO Corporation on December 17, 2003
E-274 Page 2 of 7
Model
O-320-A1A, -A1B, -A2A, -A2B,
-A2C, -A2D, -A3A, -A3B, -A3C,
-C1A, -C1B, -C2A, -C2B, -C2C,
-C3A, -C3B, -C3C, -E1A, -E1B,
-E1C, -E1F -E1J, -E2A, -E2B,
-E2C, -E2D, -E2F, -E2G, -E2H,
-E3D, -E3H
O-320-H1AD,
-H1BD, -H2AD,
-H2BD, -H3AD,
-H3BD
O-320-B1A, -B1B,
-B2A, -B2B, -B2C,
-B2D, -B3A, -B3B,
-B3C, -B2E -D1A,
-D1B, -D1C, -D1D,
-D1F, -D2A, -D2B,
-D2C, -D2F, -D2G,
-D2H, -D2J, -D3G
Type 4H0A - - - -
Rating
Max. continuous, h.p. r.p.m. full
throttle at:
Sea level pressure altitude 150-2700 160-2700 160-2700
Takeoff, h.p. r.p.m. full throttle at:
Sea level pressure altitude 150-2700 (See NOTE 8) 160-2700 See NOTE 8 160-2700 (See NOTE 8)
Fuel
(Minimum grade aviation gasoline) 80/87* 100 or 100LL* 91/96*
Carburetion** LVC-5-4PA - - - - (-B2D,-D1D-
LHC-6-6BPA)
Pressure limits See NOTE 2 - - - -
Pump Drive See NOTE 3 - - - -
Oil, Lubrication
(Lubricants should conform to the Lycoming Specification
specifications as listed or to No. 301-F - - - -
subsequent revisions thereto)
Oil sump capacity, Qt. 8 6 8
Usable oil sump capacity, Qt. 6 4 6
Temperature Limits See NOTE 1 - - - -
Pressure Limits See NOTE 2 - - - -
Ignition
Dual magnetos See NOTE 9 - - - -
Timing BTC 25 25 25
Spark plugs See NOTE 4 - - - -
Compression
Bore and stroke, in. 5.125 x 3.875 - - - -
Displacement, cu. in. 319.8 - - - -
Compression ratio 7.00:1 9.00:1 8.50:1
Weight (dry) Lb. See NOTE 9 - - - -
C.G. location (dry)
From face of propeller mounting
flange, in.
14.25 14.57 14.25 14.25 14.70
Off propeller shaft C.L., in. .97 Below .71 Below .97 Below .97 Below .79 Below
.03 Right .12 Left
(-E2D, -E3D, -E2H, -E3H)
.00 (on C.L.) .03 Right .11 Left
(-B2D, -D1D)
Propeller shaft-specification A.S. 127
Integral flanged hub SAE 2 modified - - - -
Crankshaft dampers (torsional) ⎯ ⎯ ⎯
* See latest revision of Lycoming Service Instruction 1070 for alternate fuel grades
** See latest revision of Lycoming Service Instruction 1523 for alternate carburetors.
NOTES:
"- -" indicates "same as preceding model."
"—" indicates "does not apply."
Page 3 of 7 E-274
Regulations & Amendments
Models
Date of Application
Date T.C. No. 274
Issued/Revised
CAR 13 effective March 5, 1952 O- 320, October 13, 1952 July 28, 1953
O-320-A1A
As amended by 13- & 13-2 O-320-A2 A October 21, 1954 October 28, 1954
CAR 13 effective June 15, 1956 O-320-B1A, -B2A May 24, 1957 July 25, 1957
As amended by 13-1 & 13-2
O-320-A1B, -A2B, -A3A, -A3B,
-B1B, -B2B, -B3A, -B3B
February 1959 March 23, 1959
13-3 O-320-C2A, -C2B, -C3A, -C3B January 18, 1960 February 11, 1960
O-320-A2C, -A3C, -B2C, -B3C March 29, 1960 April 27, 1960
13-3 O-320-D1A, -D2A
O-320-D1B, -D2B
O-320-E1A, -E2A, -E1B, -E2B
November 1, 1961
December 8, 1961
January 26, 1962
November 30, 1961
December 20, 1961
February 15, 1962
13-4 O-320-C1A, -C1B, -C2C, -C3C
O-320-E2C
O-320-D2C
O-320-E2D
O-320-E1C
O-320-E1F, -E2F
O-320-E2G
O-320-E3D
O-320-D1F, -D2F
O-320-E2H, -E3H
O-320-D1C
O-320-A2D
O-320-D2G
O-320-D1D
O-320-E1J
O-320-H1AD, -H1BD, -H2AD,
-H2BD
O-320-H3AD, -H3BD
O-320-D3G
O-320-D2H
O-320-D2J
January 22, 1963
November 11, 1965
April 14, 1966
December 19, 1966
May 27, 1969
July 24, 1970
December 11, 1970
January 26, 1971
February 26, 1971
July 15, 1971
September 14, 1971
March 2, 1972
March 14, 1974
March 27, 1974
January 21, 1975
September 10, 1975
June 1, 1976
August 11, 1976
May 17, 1977
December 28, 1978
March 3, 1964
November 24, 1965
May 2, 1966
January 27, 1967
June 4, 1969
August 3, 1970
December 23, 1970
February 3, 1971
March 3, 1971
July 27, 1971
September 30, 1971
March 14, 1972
March 21, 1974
May 1, 1974
January 29, 1975
January 26, 1976
June 4, 1976
August 23, 1976
May 20, 1977
January 4, 1979
O-320-B2D June 11, 1992 June 25, 1992
O-320-B2E January 30, 2003 July 8, 2003
Production basis Production Certificate No. 3
NOTE 1. Maximum permissible temperatures are as follows:
Cylinder head 500°F (well-type thermocouple)
Cylinder barrel 325°F
Oil inlet 245°F
NOTE 2. Fuel pressure limits: Minimum 0.5 p.s.i. - Maximum 8 p.s.i. For gravity feed systems, minimum fuel pressure is
15.0 inches of gasoline differential pressure across the fuel inlet fitting on 0-320-D2J.
Oil pressure limits: (Normal operation) Minimum 55 p.s.i. - Maximum 95 p.s.i.
(Idling) 25 p.s.i.
(Starting and warm- up) Maximum 115 p.s.i.
E-274 Page 4 of 7
NOTE 3. The following accessory drive provisions are available:
O-320 Models
Accessory
All
Models
not
otherwise
Shown
-H1AD,
-H1BD,
-H3AD,
-H3BD
-A2D,
-E2D,
-E2G,
-E2H,
-E3D,
-E3H
-H2AD,
-H2BD
Rotation
facing
Drive
Pad
Speed Ratio
to
Crankshaft
Max.
Torque
(in.-lb.)
Cont. Static
Max.
Overhang
Moment
(in.-lb.)
Starter * * * * CC 13.556:1 — 450 150
Starter ** ** ** ** CC 16.556:1 — 450 150
Generator * — — — C 1.910:1 60 120 175
Generator ** — — — C 2.500:1 60 120 175
Alternator — ** — ** C 1.910:1 60 120 175
Alternator ** * * * C 3.250:1 60 120 175
Vacuum Pump * — * — CC 1.300:1 70 450 25
Vacuum Pump — * — ** CC 1.313:1 70 450 25
Hydraulic Pump — — — — C 1.300:1 100 800 40
Tachometer * * * * C .500:1 7 50 5
Prop. governor — — — — C .895:1 125 1200 40
Prop. governor * — — — C .866:1 125 1200 40
Fuel Pump (Plunger) ** ** * ** — .500:1 — — 10
Fuel Pump ** ** — ** CC 1.000:1 25 450 25
Optional Dual Drive Mounting on Vacuum Pump Drive Pad
Vacuum Pump ** — — — CC 1.300:1 70 450 6
Hydraulic Pump ** — — — CC 1.300:1 Total Total 10
or
Vacuum Pump ** — — — CC 1.300:1 70 450 6
Vacuum Pump — ** — ** CC 1.313:1 70 450 6
Prop. Governor ** — — — CC 1.300:1 Total Total 10
Prop. Governor — ** — ** C 1.000:1 125 1200 40
"—" Does not apply *Standard **Optional "C" Clockwise "CC" Counter Clockwise
Accessory
-D1C
-D1D
-D1F
-E1E
-E1J
-B2E
-D2F
-E2F
-B2D
-D2G
-D2H
-D3G
-D2J
Rotation
facing
Drive
Pad
Speed Ratio
to
Crank shaft
Max. Torque
(in.-lb.)
Cont. Static
Max.
Overhang
Moment
(in.-lb.)
Starter * * * * * CC 13.556:1 — 450 150
Starter ** ** ** ** ** CC 16.556:1 — 450 150
Generator — — — — — C 1.910:1 60 120 175
Generator — — — — — C 2.500:1 60 120 175
Alternator — — — — — C 1.910:1 60 120 175
Alternator * * * * * C 3.250:1 60 120 175
Vacuum Pump ** ** ** * * CC 1.300:1 70 450 25
Vacuum Pump — — — — — C 1.910:1 60 120 175
Hydraulic Pump — * ** — — C 1.300:1 100 800 40
Tachometer * * * * * C .500:1 7 50 5
Prop. governor — * — — — C .895:1 125 200 40
Prop. governor * — — — — C .866:1 125 1200 40
Fuel Pump (Plunger) * ** * * — — .500:1 — — 10
Fuel Pump — — — — — CC 1.000:1 25 450 25
Optional Dual Drive Mounting on Vacuum Pump Drive Pad
Vacuum Pump ** — — ** ** CC 1.300:1 70 450 6
Hydraulic Pump ** — — ** ** CC 1.300:1 Total Total 10
or
Vacuum Pump ** — — ** ** CC 1.300:1 70 450 6
Vacuum Pump — — — — — CC 1.313:1 70 450 6
Prop. Governor ** — — — ** CC 1.300:1 Total Total 10
Prop. Governor — — — — — C 1.000:1 125 1200 40
"—" Does not apply *Standard **Optional "C" Clockwise "CC" Counter clockwise
Page 5 of 7 E-274
NOTE 4. Spark plugs approved for use on these engines are listed in the latest revision of Lycoming Service Instruction No.
1042.
NOTE 5. The above models incorporate additional characteristics as follows:
O-320 Models Characteristics
O-320 Basic model - four cylinder, horizonta lly opposed air cooled, direct drive with
automotive type generator and starter, provides for single acting controllable pitch
propeller.
O-320-A1A Same as O-320, mode l designation change only.
O-320-B1A Same as O-320-A1A except for co mpression ratio, fuel grade and rating.
O-320-A1B, -B1B Same as O-320-A1A and -B1A respec tively except have straight bore carburetor riser.
O-320-A2A, -A2B,
and -B2A, -B2B
Same as O-320-A1A, -A1B, -B1A and B1B respectively except have no provisions for
controllable pitch propellers.
O-320-A2D Same as O-320-E3D except crankcase m achined for conical instead of Dynafocal
mounts.
O-320-A3A, -A3B,
-B3A, and -B3B
Same as O-320-A1A, -A1B, -B1A, and -B1B respectively except have provisions for
7/16" propeller attaching bolts.
O-320-A2C, -A3C Same as O-320-A2B and -A 3B respectively, except for magnetos.
O-320-B2C, -B3C Same as O-320-B2B and -B 3B respectively, except for magnetos.
O-320-B2D Same as O-320-D1D except coni cal engine mounts and no prop governor
O-320-B2E Similar to –B2B except carburet or located same as O-320-D models
O-320-C2A, -C2B,
-C3A, -C3B
Same as O-320-B2A, -B2B, -B3A and B3B respectively, except have O-320-A series,
low compression pistons, reduced ratings and lower grade fuel requirements.
O-320-C1A, -C1B,
-C2C, -C3C
Same as O-320-B1A, -B1B, -B2C, -B3C respectively, except have been converted to low
compression pistons.
O-320-D1A Same as O-320-B3B except ha s provisions for dynafocal mounts.
O-320-D1B, -D2B Same as O-320-D1A and -D2A receptively, except for magnetos.
O-320-D1C Identical to O-320-D2C except has provision for controllable pitch propellers.
O-320-D1D Similar to O-320-D1A except incorporates Slick instead of Bendix magnetos and has a
horizontal carburetor and induction housing
O-320-D1F Identical to O-320-E1F except is equippe d with high compression pistons and has higher
H.P. rating.
O-320-D2A Same as O-320-D1A except has no pr ovisions for controllable pitch propellers
O-320-D2C Similar to model O-320-D2A except for magnetos.
O-320-D2F Similar to O-320-D1F but does not have provisions for controllable pitch propeller.
O-320-D2G Identical to O-320-D2A except incorporat es Slick instead of Bendix magnetos and 7/16
instead of 3/8 prop. flange bolts.
E-274 Page 6 of 7
O-320 Models Characteristics
O-320-D2H Same as D2G except has O-320-B sump and intake pipes and provision for AC type fuel
pump.
O-320-D2J Similar to O-320-D2G except is equipped with two Slick impulse coupling magnetos and
the prop. governor pad, fuel pump and governor pads on accessory housing are not
machined.
O-320-D3G Same as D2G except has 3/8 in prop. attaching bolts.
O-320-E1A, -E2A Same as O-320-D1A and -D2A resp ectively, except have lower compression ratio and
performance.
O-320-E1B, -E2B Same as O-320-E1A and -E2A respectively except for magnetos.
O-320-E1C, -E2C Same as O-320-E1A and -E2A respectively except have 1200 series magnetos.
O-320-E1F Similar to O-320-E1C except has propeller governor drive located on left front of
crankcase instead of on the accessory housing.
O-320-E1J Same as O-320-E1F except is equipped with Slick magnetos.
O-320-E2D Similar to O-320-E2A except has no pr ovisions for controllable pitch propeller.
O-320-E2F Identical to O-320-E1F including provisi ons for propeller governing but does not contain
propeller governor drive gears.
O-320-E2G Similar to O-320-E2D except is equipped with O-320-A series sump and intake pipes.
O-320-E2H Identical to O-320-E2D except incorporates Bendix instead of Slick magnetos.
O-320-E3D Identical to O-320-E2D except has provisi ons for .375 in. propeller flange bolts instead
of .4375 in. flange bolts.
O-320-E3H Identical to O-320-E2H except has .375 in . propeller flange bushings instead of .4375 in.
flange bushings.
O-320-H1AD Integral accessory section crankcase, front mounted fuel pump external mounted oil
pump and D4RN-2O21 impulse coupling dual magneto.
O-320-H2AD Same as -H1AD but with fixed pitch propeller.
O-320-H3AD Same as -H2AD but with 3/8 in. instead of 7/16 in. propeller flange bolts.
O-320-H1BD Same as -H1AD but with D4RN-2200 retard breaker dual magneto.
O-320-H2BD Same as -H2AD but with D4RN-2200 retard breaker dual magneto.
O-320-H3BD Same as -H3AD but with D4RN-2200 retard breaker magneto.
NOTE 6. These engines incorporate provisions for absorbing pr opeller thrust in both tractor and pusher type installations.
NOTE 7. These engines are approved for horiz ontal helicopter application and operation.
NOTE 8. The O-320-E2A and -E2C have alternate rating of 140 hp. @ 2450 r.p.m., the O-320-D series have alternate ratings
of 150 hp at 2500 r.p.m. and 155 hp. at 2600 r.p.m.; the O-320-H series have an alternate rating of 150 h.p. at 2600
r.p.m.
Page 7 of 7 E-274
NOTE 9. O-320- Weight (dry) and ignition, dual.
Models Weight Lb. Magnetos *
-A1A, -A1B, -A2A-A2B, -A3A, -A3B 244 S4LN21, S4LN20 ( TCM)+
-A2D 249 4251, 4250 (Slick)
-A2C, -A3C 243 S4LN-200, S4LN-204 ( TCM)
-B1A, -B1B, -B2A 250 S4LN-21, S4LN-20 ( TCM)
-B2B, -B3A, -B3B 250 S4LN-21, S4LN-20 ( TCM)
-B2C, -B3C 249 S4LN-200, S4LN-204 ( TCM)
-B2D 283 4373, 4370 (Slick)
-B2E 250 4373, 4370 (Slick)
-C1A, -C1B, -C2A 250 S4LN-21, S4LN-20 ( TCM)
-C2B, -C3A, -C3B 250 S4LN-21, S4LN-20 ( TCM)
-C2C, -C3C 249 S4LN-200, S4LN-204 ( TCM)
-D1A, -D2A 255 S4LN-21, S4LN-20 ( TCM)
-D1B, -D2B 254 S4LN-200, S4LN-204 ( TCM)
-D1C, -D2C 256 24LN-1227, SRLN-1209 ( TCM)
-D1D 253 4251, 4250 (Slick)
-D1F, -D2F 255 S4LN-1227, S4LN-1209 ( TCM)
-D2G 251 4251, 4250 (Slick)
-E1A, -E2A 244 S4LN-21, S4LN-20, S4LN-204 ( TCM)
-E1B, -E2B 243 S4LN-200, S4LN-204 ( TCM)
-E1C, -E2C 245 S4LN-1227, S4LN-1209 ( TCM)
-E1F, -E2F 248 S4LN-1227, S4LN-1209 ( TCM)
-E2D 249 4251, 4250 (Slick)
-E2G 249 4251, 4250 (Slick)
-E2H 252 S4LN-21, SRLN-20 ( TCM)
-E3D 249 4250, 4251 (Slick)
-E3H 252 S4LN-21, S4LN-20 ( TCM)
-E1J 245 4251, 4250 (Slick)
-D2H 251 4251, 4250 (Slick)
-D2J 255 (2) 4251 (Slick)
-D3G 251 4251, 4250 (Slick)
-H1AD 253 D4RN-2021 ( TCM)
-H2AD 253 D4RN-2021( TCM)
-H3AD 253 D4RN-2021 ( TCM)
-H1BD 253 D4RN-2200 ( TCM)
-H2BD 253 D4RN-2200 ( TCM)
-H3BD 253 D4RN-2200 ( TCM)
* For alternate magnetos see latest revision of Lycoming Service Instruction 1443
+ TCM formally Bendix
NOTE 10. All models equipped with one impulse coupling magneto may use two impulse coupling magnetos as optional
equipment. Starters, generators and alternators approved for use on the engines are listed in the latest revision of
Lycoming Service Instruction No. 1154.
----END----