# TCDS E-223: Lycoming Engines

- Type: Type certificate data sheet
- Status: Current
- Holder: Lycoming Engines
- Revision: 22
- Revised: January 31, 2020
- Product: Engine
- Certification basis: CAR 13
- Registered aircraft: 6,407, by the registry models matched to it (OpenAirDocs)
- Data sheet PDF: https://openairdocs.org/files/sha256/7c/87/7c87ca5258b1efd9ab2b8f2dc29a24e5a9a7e32ec71a3038cf5be30f9b39957a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0F97DB024367B9368625853C0061E215.0001
- Page: https://openairdocs.org/tcds/E-223

## Models (43)

As the data sheet lists them.

- O-235-K2C
- O-235-M3C
- O-235-A
- O-235-F2A
- O-235-P2A
- O-235-E1
- O-235-J2B
- O-235-C2B
- O-235-P1
- O-235-C1
- O-235-J2A
- O-235-BP
- O-235-E1B
- O-235-C1A
- O-235-B
- O-235-M1
- O-235-G2B
- O-235-M2C
- O-235-E2B
- O-235-C1B
- O-235-P3C
- O-235-P2C
- O-235-G1B
- O-235-F2B
- O-235-C2C
- O-235-N2A
- O-235-E2A
- O-235-F1
- O-235-N2C
- O-235-L2C
- O-235-G1
- O-235-K2A
- O-235-G2A
- O-235-AP
- O-235
- O-235-F1B
- O-235-K2B
- O-235-C
- O-233-A1
- O-235-H2C
- O-235-C1C
- O-235-L2A
- O-235-C2A

## What the data sheet says

From the PDF's text layer, line by line; tables lose their columns. The PDF is the record.

```text
Page No. 1 2 3 4 5 6 7 
Rev. No. 22 22 18 22 18 18 22 
 
DEPARTMENT OF TRANSPORTATION 
FEDERAL AVIATION ADMINISTRATION 
 
E-223 
Revision 22 
Lycoming Engines 
O-233-A1,O-235 
O-235-A, -B, -AP, -BP, -C, -C1, -C1A, -C1B, -C1C, -C2A, -C2B, -C2C, 
         -E1, -E1B, -E2A, -E2B, -F1, -F1B, -F2A, -F2B, -G1, -G1B,  
         -G2A,-G2B, -H2C, -J2A, -J2B, -K2A, -K2B, -K2C, -L2A, -L2C, 
         -M1, -M2C, -M3C, -N2A, -N2C, -P1, -P2A, -P2C, -P3C 
January 31, 2020 
 
TYPE CERTIFICATE DATA SHEET NO. E-223 
 
Engines of models described herein conforming with this data sheet (which is a part of Type Certificate No. E-223) 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 
 652 Oliver Street 
 Williamsport, Pennsylvania  17701 
 
Type Certificate Holder Record Avco Lycoming Williamsport Div., AVCO Corporation transferred TC E-223 to 
Lycoming Engines, An Operating Division of AVCO Corporation on December 17, 2003 
 
Model O-235-C1,-C1B, 
-E1,-E1B 
O-235-C1C O-235-C1A O-235-C2C, 
-H2C 
O-235-L2C, 
-K2C 
Type 4HOA Direct Drive - - - - - - - - 
Rating      
   Max. continuous hp., r.p.m.      
Sea level pressure altitude 115-2800-S.L. 108-2600-S.L. 100-2450-S.L. 108-2600-S.L. 
(See Note 11) 
115-2700-S.L. 
(See Note 12) 
Takeoff (5 min.) hp., r.p.m. at full  
throttle 
115-2800 115-2800 100-2450 115-2800 118-2800 
Fuel (minimum grade aviation 
gasoline) 
Lycoming Service 
Instruction 1070 
- - - - - - - - 
Lubricating Oil (Lubricants should 
conform to the specifications as 
listed or later revisions thereto) 
Lycoming Spec. 
No. 301 and 
Service Instruction 
1014 
- - - - - - - - 
Bore and stroke, inch 4.375 x 3.875 - - - - - - - - 
Displacement, cubic inch 233 - - - - - - - - 
Compression ratio 6.75:1 - - - - - - 8.5:1 
Weight (dry), lb. (See NOTE 8) - - - - - - - - 
C.G. Location (See NOTE 8) - - - - - - - - 
Propeller shaft end size Integral flange - 
SAE Type 2 
- - - - Type 1 - - 
Crankshaft Dampers None - - - - - - - - 
Carburetor+ MA-3A or 
 MA-3PA 
- - MA-3A LVC-3-3A or 
LVC-3-3PA 
- - 
Ignition, dual (See NOTE 8) - - - - - - - - 
Spark plugs (See NOTE 7) - - - - - - - - 
Ignition, timing °BTC 25 - - 15 25 20 
Oil sump capacity, qt. 6 - - - - - - - - 
Usable oil, qt. 4 - - - - - - - - 
NOTES 1 thru 5,7,8,10 - - - - 1 thru 
5,7,8,10,11 
- - 
"- -" indicates "same as preceding model" 
+       See latest revision of Lycoming Service Instruction No. 1523 for alternate carburetors.

E-223 Page 2 of 7 
 
Models (Continued) O-235-C2A, 
-C2B,-E2A, 
-E2B 
O-235-F1, 
-F1B,-G1, 
-G1B 
O-235-F2A, 
-F2B,-G2A, 
-G2B,-J2A, 
-J2B 
O-235-K2A, 
-K2B,-L2A, 
-M1,-M2C, 
-M3C 
O-235-N2A, 
-N2C,-P1, 
-P2A,-P2C, 
-P3C 
Type 4HOA Direct 
Drive 
- - - - - - - - 
Rating      
Max. continuous hp., r.p.m.      
Sea level pressure altitude 115-2800-S.L. 125-2800-S.L. 125-2800-S.L. 118-2800-S.L. 
(See NOTE 12) 
116-2800-S.L. 
(See NOTE 14) 
Takeoff (5 min.) hp., r.p.m. at full  
throttle 
115-2800 125-2800 125-2800 118-2800 116-2800 
Fuel (minimum grade aviation  
  gasoline) 
Lycoming 
Service 
Instruction 1070 
- - - - - - - - 
Lubricating Oil (Lubricants should  
conform to the specifications as 
listed or later revisions thereto) 
Lycoming Spec. 
No. 301 and 
Service 
Instruction 1014 
- - - - - - - - 
Bore and stroke, inch 4.375 x 3.875 - - - - - - - - 
Displacement, cubic inch 233 - - - - - - - - 
Compression ratio 6.75:1 9.7:1 - - 8.5:1 8.1:1 
Weight (dry), lb. (See NOTE 8) - - - - - - - - 
C.G. Location (See NOTE 8) - - - - - - - - 
Propeller shaft end size Integral flange - 
SAE Type 1 
Type 2 Type 1 Type 1* Type 1* 
Crankshaft Dampers None - - - - - - - - 
Carburetor+ LVC-3-3A or 
LVC-3-3PA 
MA-3A or 
MA-3PA 
LVC-3-3A or 
LVC-3-3PA 
- - - - 
Ignition, dual (See NOTE 8) - - - - - - - - 
Spark plugs (See NOTE 7) - - - - - - - - 
Ignition, timing °BTC 25 - - - - 20 - - 
Oil sump capacity, qt. 6 - - - - - - - - 
Usable oil, qt. 4 - - - - - - - - 
NOTES 1 thru 5,7,8,10 - - - - - - - - 
 
"- -" indicates "same as preceding model" 
*      Models O-235-M1, -M3C, -P1 and -P3C have a type 2 flange 
+       See latest revision of Lycoming Service Instruction No. 1523 for alternate carburetors. 
 
 
 
CERTIFICATION BASIS: 
 
 
Regulations & Amendments 
 
 
Model 
 
 
Date of Application 
Date of Type 
Certificate E-223 
 Issued/Revised 
 
Canceled 
(See Note 6) 
CAR 13 As Amended to May 31, 1938 O-233-A1 June 13, 1940 August 26, 1940 February 25, 1944 
As Amended to November 15, 1940 O-235 April 19, 1941 February 11, 1942 December 1, 1947 
CAR 13 Effective August 1, 1941 O-235-A June 15, 1942 July 3, 1942 & 1947 December 1, 1947 
 O-235-B May 2, 1944 July 21, 1944 December 1, 1947 
 O-235-AP July 17, 1944 July 21, 1944 December 1, 1947 
 O-235-BP May 2, 1944 July 21, 1944 December 1, 1947 
 O-235-C November 15, 1945 January 3, 1946 December 1, 1947 
 (O-235-2 SEE NOTE 6)   
 O-235-C1 September 11, 1946 March 20, 1947  
 O-235-C1A May 28, 1948 July 7, 1948

Page 3 of 7 E-223 
 
 
 
Regulations & Amendments   (cont’d) 
 
 
Model 
 
 
Date of Application 
Date of Type 
Certificate E-223 
 Issued/Revised 
 
Canceled 
(See Note 6) 
CAR 13 Effective June 15, 1956 O-235-C1B October 4, 1960 October 12, 1960  
As Amended by 13-1, 13-2, & 13-3 O-235-C1C January 6, 1976 January 23, 1976  
 O-235-C2A May 26, 1965 July 22, 1965  
 O-235-C2B October 4, 1966 November 29, 1966  
 O-235-C2C February 6, 1968 February 16, 1968  
 O-235-E1 October 31, 1968 June 17, 1969  
 O-235-E1B October 31, 1968 June 17, 1969  
 O-235-E2A October 31, 1968 June 17, 1969  
 O-235-E2B October 31, 1968 June 17, 1969  
 O-235-F1 February 27, 1979 March 11, 1971  
 O-235-F1B February 27, 1970 March 11, 1971  
 O-235-F2A February 27, 1970 March 11, 1971  
 O-235-F2B February 27, 1970 March 11, 1971  
 O-235-G1 May 10, 1971 May 17, 1971  
 O-235-G1B May 10, 1971 May 17, 1971  
 O-235-G2A May 10, 1971 May 17, 1971  
 O-235-G2B May 10, 1971 May 17, 1971  
 O-235-H2C December 20, 1972 January 4, 1973  
 O-235-J2A February 6, 1973 February 12, 1973  
 O-235-J2B December 20, 1972 January 4, 1973  
 O-235-K2A April 19, 1974 June 6, 1974  
 O-235-K2B April 19, 1974 June 6, 1974  
 O-235-K2C June 23, 1978 June 28, 1978  
 O-235-L2A April 19, 1974 June 6, 1974  
 O-235-L2C June 25, 1975 July 11, 1975  
 O-235-M1 September 27, 1978 October 6, 1978  
 O-235-M2C October 23, 1981 November 4, 1981  
 O-235-M3C October 23, 1981 November 4, 1981  
 O-235-N2A December 3, 1981 January 5, 1982  
 O-235-N2C December 3, 1981 January 5, 1982  
 O-235-P1 April 23, 1982 May 12, 1982  
 O-235-P2C April 23, 1982 May 12, 1982  
 O-235-P3C April 23, 1982 May 12, 1982  
 O-235-P2A April 20, 1983 April 26, 1983  
 
PRODUCTION BASIS: Production Certificate No. 3 
 
NOTE 1. Maximum Permissible Temperatures: 
 Cylinder Head   
 
Models 
Spark Plug Washer 
Thermocouple 
Well Type 
Thermocouple 
 
Cylinder Barrel 
 
Oil Inlet 
All except 0-223-A1 525°F 500°F 325°F 245°F 
O-235, O-235-A, -AP     
O-235-B (O-235-2),  
-BP 
-C

E-223 Page 4 of 7 
NOTE 2. For all models except O-233-A1, O-235, O-235-A, -AP, -B(O-235-2), -BP, -C, allowable fuel pressures at carburetor 
inlet are: 
 
 3.0 p.s.i. desired, 0.5 p.s.i. minimum and 8.0 p.s.i. maximum. 
 
 For gravity feed systems, minimum fuel pressure is 7.5 inches of gasoline differential pressure across the fuel inlet 
fitting for the O-235-K, -L, -M, -N series. 
 
 Oil Pressure Limits - (Normal operations) Minimum 60 p.s.i. Maximum 90 p.s.i. 
   (Idling 25 p.s.i.)  
  (Starting & Warm-up)  Maximum 100 p.s.i. (O-235-N and P 
series-115 p.s.i. max.) 
 
NOTE 3. Deleted.  (Accessories such as generators, fuel pumps, etc., previously listed in NOTE 3 are satisfactory for 
continued use with these engines.  Accessories of these type are not integral engine accessories and therefore are not 
evaluated for approval during engine certification testing.  The airworthiness of such accessories is substa ntiated 
during aircraft-installation system approval.  The suitability of the accessory for the engine mounting provisions as 
described in NOTE 4 of this data sheet must be determined when processing such approval. 
 
NOTE 4. The following accessory drives are available: 
 
 
 
 
Accessory Drive 
 
 
 
 
-C1A 
 
 
 
-C2A, -C2B 
-C1C, -C2C 
 
 
 
-G1, -G1B 
-G2A, -G2B 
-F1, -F1B, -F2A, -F2B, -H2C, 
-J2A, -J2B, -K2A, -K2B, 
-L2A, -L2C, -K2C, -M1, 
-M2C, -M3C, -N2A, -N2C 
-P1, -P2A, -P2C, -P3C 
Starter■ * * * * 
Generator■ * * # # 
or Generator■  ** # # 
or Alternator■  ** * * 
Fuel Pump (Plunger) * ** ** ** 
Tachometer● * * * * 
Vacuum Pump● ** ** ** ** 
Propeller Governor # # ** *** 
"#" indicates "does not apply" * = Standard, ** = Optional C = Clockwise, CC = Counter-Clockwise 
*** = Models O-235-M1, -M2C, -M3C, -P1, -P2A, -P2C, -P3C are equipped with a Propeller Governor Drive, AN20010, Type 
XX, note torque limitations. 
■ These accessories are optional, see latest revision of Lycoming Service Instruction 1154 for the approved alternates. 
● These drives are optional and accessory pads may be cast over. 
 
 Rotation Speed Maximum Torque Maximum 
 Facing Ratio to (in. -lb.) Overhang Moment 
Accessory Drive Drive Pad Crankcase Cont. Static (in. -lb.) 
Starter■ CC 13.556:1 # 450 150 
Generator■ C 1.910:1 60 120 175 
or Generator■ C 2.50:1 60 120 175 
or Alternator■ C 3.25:1 60 120 175 
Fuel Pump (Plunger) # 0.500:1 # # 10 
Tachometer● C 0.500:1 7 50 5 
Vacuum Pump● CC 1.300:1 70 450 25 
Propeller Governor C 0.866:1 125 1200 40 
"#" indicates "does not apply" * = Standard, ** = Optional C = Clockwise, CC = Counter-Clockwise 
*** = Models O-235-M1, -M2C, -M3C, -P1, -P2A, -P2C, -P3C are equipped with a Propeller Governor Drive, AN20010, Type 
XX, note torque limitations. 
■ These accessories are optional, see latest revision of Lycoming Service Instruction 1154 for the approved alternates. 
● These drives are optional and accessory pads may be cast over.

Page 5 of 7 E-223 
NOTE 5. The foregoing models incorporate additional different characteristics as follows: 
 
 Models   Characteristics 
 O-235-C1- Four cylinder, horizontally opposed, air cooled, direct drive.  Has provisions for dual pump drives.  
Eligible for both tractor and pusher type installations. 
 
 O-235-C1A- Similar to O-235-C1 except ignition timing, lower r.p.m. and hp.  Has optional 2 position or 
automatic propeller governor drive. 
 
 O-235-C1B- Similar to O-235-C1 except has retard breaker magnetos. 
 
 O-235-C1C- Similar to O-235-C1 except has Slick magnetos. 
 
 O-235-C2A- Similar to O-235-C1 except has a type 1 propeller flange. 
 
 O-235-C2B- Similar to O-235-C2A but has S-1200 series magnetos. 
 
 O-235-C2C- Similar to O-235-C2B except incorporates Slick magnetos with integral shielded ignition harness. 
 
 O-235-E1- Similar to O-235-C1 except crankcase and crankshaft, modified to supply pressurized oil to contant 
speed propeller; Accessory case changed to accommodate a standard propeller governor drive. 
 
 O-235-E1B- Similar to O-235-E1 except for S4LN-200 series retard breaker magnetos. 
 
 O-235-E2A- Similar to O-235-E1 except has Type 1 propeller flange. 
 
 O-235-E2B- Similar to O-235-E2A except incorporates S-1200 series magnetos. 
 
 O-235-F1- Similar to O-235-C1 except for compression ratio, fuel grade and rating. 
 
 O-235-F1B- Similar to O-235-F1 except has retard breaker magnetos. 
 
 O-235-F2A- Similar to O-235-F1 except has a Type 1 propeller flange. 
 
 O-235-F2B- Similar to O-235-F2A but has a S-1200 series magnetos. 
 
 O-235-G1- Similar to O-235-F1 except has provisions for using constant speed propeller. 
 
 O-235-G1B- Similar to O-235-G1 except has retard breaker magnetos. 
 
 O-235-G2A- Similar to O-235-G1 except has a Type 1 propeller flange. 
 
 O-235-G2B- Similar to O-235-G2A except has S-1200 series magnetos. 
 
 O-235-H2C- Similar to O-235-C2C except has Type 1 dynafocal mounting. 
 
 O-235-J2B- Similar to O-235-F2B except has Type 1 dynafocal mounting. 
 
 O-235-J2A- Similar to O-235-J2B except for magnetos. 
 
 O-235-K2A- Similar to O-235-F2A except ignition timing, lower hp. and reduced compression ratio. 
 
 O-235-K2B- Similar to O-235-F2B except ignition timing, lower hp. and reduced compression ratio. 
 
 O-235-K2C- Similar to O-235-K2A except has Slick magnetos. 
 
 O-235-L2A- Similar to O-235-J2A except ignition timing, lower hp and reduced compression ratio.

E-223 Page 6 of 7 
 O-235-L2C- Similar to O-235-L2A except has Slick magnetos and lower maximum continuous rating. 
 
 O-235-M1- Similar to -L2A except has provision for controllable propeller and has AS-127 Type 2 propeller 
flange. 
 
 O-235-M2C- Similar to O-235-M1 except has Slick 4200 series magnetos and Type 1 propeller flange. 
 
 O-235-M3C- Similar to O-235-M1 except has Slick 4200 series magnetos. 
 
 O-235-N2A- Similar to O-235-L2A except has reduced compression ratio and reduced power ratings. 
 
 O-235-N2C- Similar to O-235-L2C except has reduced compression ratio and reduced power ratings. 
 
 O-235-P1- Similar to O-235-M1 except has reduced compression ratio and reduced power ratings. 
 
 O-235-P2C- Similar to O-235-M2 except has reduced compression ratio and reduced power ratings. 
 
 O-235-P3C- Similar to O-235-M3C except has reduced compression ratio and reduced power ratings. 
 
 O-235-P2A- Similar to O-235-P1 except has a Type 1 propeller flange. 
 
 
NOTE 6. Approval of the following models has expired.  No engines of these models manufactured after the date or with 
serial numbers above those listed below are eligible for use in certificated aircraft.  (The early production engines 
may still be used in certificated aircraft or installed under a supplemental type c ertificate).  Detail specifications for 
these engines have been deleted from this data sheet.  Such information can be obtained by contacting the Manager, 
Propulsion Branch of the New York Aircraft Certification Office, Federal Aviation Administration. 
 
 Model Date Serial No. 
 O-233-A1 2-25-44 106 
 O-235, O-235-A, -AP, O-235-B, 12-1-47 4524-15 
 -BP, O-235-C 
 O-235-2 Identical to O-235-B.  When engines of this model are installed in certificated aircraft, the 
corresponding commercial model designation should be added to the engine nameplate. 
 
NOTE 7. Spark Plugs: See latest revision of Lycoming Service Instruction No. 1042 for approved equipment.

Page 7 of 7 E-223 
NOTE 8. Ignition, C.G. and Weights 
     
 C.G. Location (dry) including starter and generator Off prop.  
  Propeller Flange Below prop. shaft Weight 
Model Ignition, dual* # front face, in. shaft C.L., in. C.L., in. (dry) lb. 
O-235-C1 TCM S4LN-21, S4LN-20 14.75 1.13 0.20 Left 246 
O-235-C1A TCM SF4LN-8, SF4N-8 
TCM SF4LN-21, S4LN-20 
14.75 1.13 0.20 Left 236 
O-235-C1B TCM S4LN-200, S4LN-204 14.75 1.13 0.20 Left 245 
O-235-C1C Slick 4251, 4250 14.75 1.13 0.20 Left 243 
O-235-C2A TCM S4LN-21, S4LN-20 14.75 1.13 0.20 Left 246 
O-235-C2B TCM S4LN-1227, S4LN-1209 14.75 1.13 0.20 Left 247 
O-235-C2C Slick 4251, 4250 14.75 1.13 0.20 Left 244 
O-235-E1 TCM S4LN-21, S4LN-20 14.51 1.17 0.15 Left 250 
O-235-E1B TCM S4LN-200, S4LN-204 14.51 1.17 0.15 Left 249 
O-235-E2A TCM S4LN-21, S4LN-20 14.51 1.17 0.15 Left 250 
O-235-E2B TCM S4LN-1227, S4LN-1209 14.51 1.17 0.15 Left 251 
O-235-F1 TCM S4LN-21, S4LN-20 14.75 1.13 0.20 Left 250 
O-235-F1B TCM S4LN-200, S4LN-204 14.75 1.13 0.20 Left 249 
O-235-F2A TCM S4LN-21, S4LN-20 14.75 1.13 0.20 Left 250 
O-235-F2B TCM S4LN-1227, S4LN-1209 14.75 1.13 0.20 Left 251 
O-235-G1 TCM S4LN-21, S4LN-20 14.51 1.17 0.15 Left  253 
O-235-G1B TCM S4LN-200, S4LN-204 14.51 1.17 0.15 Left 252 
O-235-G2A TCM S4LN-21, S4LN-20 14.51 1.17 0.15 Left 253 
O-235-G2B TCM S4LN-1227, S4LN-1209 14.51 1.17 0.15 Left 254 
O-235-H2C Slick 4251, 4250 14.75 1.13 0.20 Left 243 
O-235-J2A TCM S4LN-21, S4LN-20 14.75 1.13 0.20 Left 252 
O-235-J2B TCM S4LN-1227, S4LN-1209 14.75 1.13 0.20 Left 253 
O-235-K2A TCM S4LN-21, S4LN-20 14.75 1.13 0.20 Left 252 
O-235-K2B TCM S4LN-1227, S4LN-1209 14.75 1.13 0.20 Left 253 
O-235-K2C Slick 4252 or 4281 and 4250 14.75 1.13 0.20 Left 248 
O-235-L2A,  
-N2A 
TCM S4LN-20, -21 or  
S4LN-204, -21, or two S4LN-21 
14.75 1.13 0.20 Left 252 
O-235-L2C, -N2C Slick 4250, 4252, or 4250, 4281, 
or two 4252, or two 4281 
14.75 1.13 0.20 Left 249 
O-235-M1, -P1 & -P2A TCM S4LN-20, -21 or  
S4LN-204, -21 or two S4LN-21 
14.51 1.17 0.15 Left 255 
O-235-M2C, -M3C,  
-P2C, and -P3C 
Slick 4250, 4281 or 4252, Opt. 
two 4252 or 4281 
14.51 1.17 0.15 Left 252 
 
* For alternate ignition systems see latest revision of Lycoming Service Instruction 1443. 
# Teledyne (TCM) formally Bendix 
 
NOTE 9. Deleted 3/21/80. 
 
NOTE 10. Starters, generators and alternators approved for use on these engines are listed in the latest revision of Lycoming 
Service Instruction No. 1154. 
 
NOTE 11. Models O-235-C2C and O-235-H2C have an alternate rated maximum continuous power rating of 100 hp at 2400 
r.p.m. 
 
NOTE 12. Models O-235-L2A, -L2C, O-235-M1, -M2C, and O-235-M3C have alternate ratings of 115 hp at 2700 r.p.m., 112 
hp at 2600 r.p.m., 110 hp at 2550 r.p.m., and 105 hp at 2400 r.p.m. 
 
NOTE 13. All models equipped with one impulse coupling magneto, may use two impulse coupling magnetos as optional 
equipment. 
 
NOTE 14. Models O-235-N2A, -N2C, -P1, -P2A, -P2C, -P3C have alternate ratings of 113 hp at 2700 r.p.m., 110 hp at 2600 
r.p.m., 108 hp at 2550 r.p.m. and 103 hp at 2400 r.p.m. 
 
.....END......
```

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- [AD 2012-03-07](https://openairdocs.org/ad/2012-03-07): Carburetor · Lycoming Engines GO-435, GO-435-C2 (O-435-17), GO-435-C2A and 389 more. Effective Mar 27, 2012
- [AD 2004-10-14](https://openairdocs.org/ad/2004-10-14): Crankshaft gear · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 642 more. Effective Jun 25, 2004
- [AD 98-17-11](https://openairdocs.org/ad/98-17-11): Crankshafts · Continental Motors A-65-3, A-65-8, A75-8 and 90 more. Effective Oct 19, 1998
- [AD 98-01-06](https://openairdocs.org/ad/98-01-06): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 184 more. Effective Feb 13, 1998
- [AD 96-09-10](https://openairdocs.org/ad/96-09-10): Oil pump · Lycoming Engines AEIO-320-E1A, AEIO-320-E1B, AEIO-320-E2A and 334 more. Effective Jul 15, 1996
- [AD 95-03-10](https://openairdocs.org/ad/95-03-10): Push Rods · Lycoming Engines O-235, O-235-A, O-235-AP and 38 more. Effective Jan 24, 1996
- [AD 95-26-02](https://openairdocs.org/ad/95-26-02): Aviation Gasoline · Lycoming Engines IO-320-B1A, IO-320-B1B, IO-320-B1C and 182 more. Effective Jan 24, 1996
- [AD 93-19-04](https://openairdocs.org/ad/93-19-04): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 184 more. Effective Oct 18, 1993
- [AD 90-04-06 R1](https://openairdocs.org/ad/90-04-06-R1): Propeller Governor External Oil Line · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 427 more. Effective May 28, 1991
- [AD 88-02-04](https://openairdocs.org/ad/88-02-04): Carburetors · Lycoming Engines O-235-C1C, O-235-H2C, O-235-L2A and 4 more. Effective Feb 1, 1988
- [AD 81-16-05](https://openairdocs.org/ad/81-16-05): Magnetos · Lycoming Engines AEIO-320-E1B, AEIO-320-E2B, AEIO-360-B1G6 and 234 more. Effective Aug 6, 1981
- [AD 80-25-02 R2](https://openairdocs.org/ad/80-25-02-R2): Pushrods · Lycoming Engines O-235, O-235-A, O-235-AP and 30 more. Effective Jan 13, 1981
- [AD 80-06-05](https://openairdocs.org/ad/80-06-05): Magnetos · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 254 more. Effective Mar 28, 1980
- [AD 78-25-01](https://openairdocs.org/ad/78-25-01): Condensers · Lycoming Engines O-235-L2C. Effective Dec 8, 1978
- [AD 75-08-09](https://openairdocs.org/ad/75-08-09): Oil Pump Drive Shaft · Lycoming Engines AEIO-360-A1B, AEIO-360-A1B6, AEIO-360-A1C and 365 more. Effective Aug 18, 1977
- [AD 69-24-03](https://openairdocs.org/ad/69-24-03): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 321 more. Effective Nov 29, 1969
- [AD 66-06-03](https://openairdocs.org/ad/66-06-03): Connecting Rod Assemblies · Lycoming Engines GO-435-C2 (O-435-17), GO-435-C2A, GO-435-C2A2 and 317 more. Effective Jan 16, 1969
- [AD 2024-21-02](https://openairdocs.org/ad/2024-21-02) (historical): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 548 more. Effective Dec 5, 2024
- [AD 81-18-04 R2](https://openairdocs.org/ad/81-18-04-R2) (historical): Engine Oil Pump Driven Impeller and Shaft · Textron Lycoming, AVCO AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 376 more. Effective Jun 7, 1982

## Registered aircraft by registry model (OpenAirDocs)

- [Lycoming 0-235 series](https://openairdocs.org/engine/lycoming-0-235-series): 6,133 aircraft (registry code 41505)
- [Lycoming O-235-L2C](https://openairdocs.org/engine/lycoming-o-235-l2c): 84 aircraft (registry code 42035)
- [Lycoming O-235-C1](https://openairdocs.org/engine/lycoming-o-235-c1): 49 aircraft (registry code 42027)
- [Lycoming O-235-C](https://openairdocs.org/engine/lycoming-o-235-c): 31 aircraft (registry code 42397)
- [Lycoming O-235-C2C](https://openairdocs.org/engine/lycoming-o-235-c2c): 29 aircraft (registry code 42033)
- [Lycoming O-235-C1B](https://openairdocs.org/engine/lycoming-o-235-c1b): 20 aircraft (registry code 42028)
- [Lycoming O235N2C](https://openairdocs.org/engine/lycoming-o235n2c): 18 aircraft (registry code 42166)
- [Lycoming O-235](https://openairdocs.org/engine/lycoming-o-235): 14 aircraft (registry code 42717)
- [Lycoming O-235-K2C](https://openairdocs.org/engine/lycoming-o-235-k2c): 13 aircraft (registry code 42036)
- [Lycoming O-233](https://openairdocs.org/engine/lycoming-o-233-series): 6 aircraft (registry code 42410)
- [Lycoming O-235-C1A](https://openairdocs.org/engine/lycoming-o-235-c1a): 2 aircraft (registry code 42032)
- [Lycoming O-235-L2A](https://openairdocs.org/engine/lycoming-o-235-l2a): 2 aircraft (registry code 42053)
- [Lycoming O-235-N2A](https://openairdocs.org/engine/lycoming-o-235-n2a): 2 aircraft (registry code 42057)
- [Lycoming O-235-C2](https://openairdocs.org/engine/lycoming-o-235-c2-series): 1 aircraft (registry code 42392)
- [Lycoming O-235-E1](https://openairdocs.org/engine/lycoming-o-235-e1): 1 aircraft (registry code 42029)
- [Lycoming O-235-F2B](https://openairdocs.org/engine/lycoming-o-235-f2b): 1 aircraft (registry code 42046)
- [Lycoming O-235-J2B](https://openairdocs.org/engine/lycoming-o-235-j2b): 1 aircraft (registry code 42050)
- [Lycoming O-235-C1C](https://openairdocs.org/engine/lycoming-o-235-c1c): 0 aircraft (registry code 42031)
- [Lycoming O-235-C2A](https://openairdocs.org/engine/lycoming-o-235-c2a): 0 aircraft (registry code 42037)
- [Lycoming O-235-C2B](https://openairdocs.org/engine/lycoming-o-235-c2b): 0 aircraft (registry code 42038)
- [Lycoming O-235-E1B](https://openairdocs.org/engine/lycoming-o-235-e1b): 0 aircraft (registry code 42030)
- [Lycoming O-235-E2A](https://openairdocs.org/engine/lycoming-o-235-e2a): 0 aircraft (registry code 42039)
- [Lycoming O-235-E2B](https://openairdocs.org/engine/lycoming-o-235-e2b): 0 aircraft (registry code 42040)
- [Lycoming O-235-F1](https://openairdocs.org/engine/lycoming-o-235-f1): 0 aircraft (registry code 42041)
- [Lycoming O-235-F1B](https://openairdocs.org/engine/lycoming-o-235-f1b): 0 aircraft (registry code 42042)
- [Lycoming O-235-F2A](https://openairdocs.org/engine/lycoming-o-235-f2a): 0 aircraft (registry code 42045)
- [Lycoming O-235-G1](https://openairdocs.org/engine/lycoming-o-235-g1): 0 aircraft (registry code 42043)
- [Lycoming O-235-G1B](https://openairdocs.org/engine/lycoming-o-235-g1b): 0 aircraft (registry code 42044)
- [Lycoming O-235-G2A](https://openairdocs.org/engine/lycoming-o-235-g2a): 0 aircraft (registry code 42047)
- [Lycoming O-235-G2B](https://openairdocs.org/engine/lycoming-o-235-g2b): 0 aircraft (registry code 42048)
- [Lycoming O-235-H2C](https://openairdocs.org/engine/lycoming-o-235-h2c): 0 aircraft (registry code 42034)
- [Lycoming O-235-J2A](https://openairdocs.org/engine/lycoming-o-235-j2a): 0 aircraft (registry code 42049)
- [Lycoming O-235-K2A](https://openairdocs.org/engine/lycoming-o-235-k2a): 0 aircraft (registry code 42051)
- [Lycoming O-235-K2B](https://openairdocs.org/engine/lycoming-o-235-k2b): 0 aircraft (registry code 42052)
- [Lycoming O-235-M1](https://openairdocs.org/engine/lycoming-o-235-m1): 0 aircraft (registry code 42054)
- [Lycoming O-235-M2C](https://openairdocs.org/engine/lycoming-o-235-m2c): 0 aircraft (registry code 42055)
- [Lycoming O-235-M3C](https://openairdocs.org/engine/lycoming-o-235-m3c): 0 aircraft (registry code 42056)
- [Lycoming O-235-P1](https://openairdocs.org/engine/lycoming-o-235-p1): 0 aircraft (registry code 42059)
- [Lycoming O-235-P2A](https://openairdocs.org/engine/lycoming-o-235-p2a): 0 aircraft (registry code 42060)
- [Lycoming O-235-P2C](https://openairdocs.org/engine/lycoming-o-235-p2c): 0 aircraft (registry code 42061)
- [Lycoming O-235-P3C](https://openairdocs.org/engine/lycoming-o-235-p3c): 0 aircraft (registry code 42062)

## STCs approved under this data sheet (45)

- [STC SE04651CH](https://openairdocs.org/stc/SE04651CH): To allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22. Swift Fuels LLC
- [STC SE00825WI](https://openairdocs.org/stc/SE00825WI): Installation of Specialty Products Spin-on oil filter on Lycoming Engines.. B & C Specialty Products Inc.
- [STC SE2932SW](https://openairdocs.org/stc/SE2932SW): Install carburetor air temperature indicator. Approved for Aircooled Motors (Franklin Engine Co.) equipped with float carburetors. Model eligibility included here may not be inclusive.. Alcor LLC
- [STC SE208SO](https://openairdocs.org/stc/SE208SO): Installation of ice indicator in the carburetor.. LegacySTC.com
- [STC SE04349CH](https://openairdocs.org/stc/SE04349CH): Installation of SureFly electronic ignition. SureFly Partners Ltd.
- [STC SE02352CH](https://openairdocs.org/stc/SE02352CH): Installation of Challenger cleanable oil filter assembly. Challenger Aviation Products Inc.
- [STC SE00939WI](https://openairdocs.org/stc/SE00939WI): Installation of B&C Specialty Products Model BC 315-( ) Starter on Lycoming engines.. B & C Specialty Products Inc.
- [STC SE2393CE](https://openairdocs.org/stc/SE2393CE): Installation of B&C Speciality Products lightweight (10.2 pounds) engine starter, part number BC-315-100-1 (12 volts)
or part number BC-315-100-3 (24 volts). B & C Specialty Products Inc.
- [STC SE03232CH](https://openairdocs.org/stc/SE03232CH): Installation of Engine Preheat Kit p/n TA2925-1 for 115 volt application. Hartzell Propeller Inc.
- [STC SE04577CH](https://openairdocs.org/stc/SE04577CH): Install an electronic engine ignition system. Electroair Acquisition Corp
- [STC SE01966WI](https://openairdocs.org/stc/SE01966WI): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines. General Aviation Modifications Inc.
- [STC SE8628SW](https://openairdocs.org/stc/SE8628SW): Installation of oil nozzles for lubrication of cam and filters.. Cygnet Aerospace Corp
- [STC SE792NW](https://openairdocs.org/stc/SE792NW): Modification of a Lycoming0-235-L2C, or 0-235-L2A engine to increase HP rating from 115-HP at 2700 rpm to a continuous125 HP at 2800 rpm.. 4J's Aviation
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings.. Continental Motors, Inc.
- [STC SE00218NY](https://openairdocs.org/stc/SE00218NY): Replacement of Lycoming starter with SKY-TEC 12 volt starter installed.. Hartzell Engine Technologies, LLC
- [STC SE00226NY](https://openairdocs.org/stc/SE00226NY): Replacement of Lycoming starter with SKY-TEC 24-volt starter Models 149-24HT and 122-24HT. Approval limited to 24-volt DC source available to the starter.. Hartzell Engine Technologies, LLC
- [STC SE00357NY](https://openairdocs.org/stc/SE00357NY): Replacement of Lycoming starter with SKY-TEC 24-volt starter installed.. Hartzell Engine Technologies, LLC
- [STC SE2901NM](https://openairdocs.org/stc/SE2901NM): Lycoming valve cover gasket. Real Gaskets Tennessee
- [STC SE888GL](https://openairdocs.org/stc/SE888GL): Replacement of Bendix S4LN-20, -21, -1209, or -1227 model magnetos with Slick model 4250 and 4251 magnetos.. Champion Aerospace LLC
- [STC SE3877NM](https://openairdocs.org/stc/SE3877NM): Modification of a Lycoming O-235-L2C engine to increase the horsepower rating from 115 HP @ 2700 RPM to a continuous 125 HP @ 2800 RPM. Kai V. Nielsen
- [STC SE8707SW](https://openairdocs.org/stc/SE8707SW): Alteration of Lycoming O-235 engine to allow use of ethanol fuel.. Shauck Dr Maxwell E Jr
- [STC SE01930NY](https://openairdocs.org/stc/SE01930NY): Installation of Casper Labs 90 degree oil filter housing adapter.. Casper Labs Inc
- [STC SE01943CH](https://openairdocs.org/stc/SE01943CH): Add the following approved fuels:  unleaded automotive gasoline 87 minimum antiknock index, per ASTM Specification D-439 or D-4814 of any volatility class, A through E, or 82UL AVGAS per ASTM D-6227.. Experimental Aircraft Association Inc.
- [STC SE790GL](https://openairdocs.org/stc/SE790GL): Superseded by STC SE01943CH.  Replace Lycoming piston number LW-13623 with Lycoming piston number 73851.. EAA Aviation Foundation
- [STC SE1779NM](https://openairdocs.org/stc/SE1779NM): Installation of Precise Flight, Inc. Standby Vacuum System SVS III. Precise Flight Inc
- [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter.. Aviation Development Corporation
- [STC SE00988CH](https://openairdocs.org/stc/SE00988CH): Modify Lycoming aircraft engine Model O-235-C2C rated at maximum continuous 108 hp at 2600 rpm and 6.75:1 compression ratio to maximum continuous 115 at 2700 rpm and 8.5:1 compression ratio.. Precision Engine
- [STC SE09492SC](https://openairdocs.org/stc/SE09492SC): Installation and usage of Exxon 20W50 multigrade aircraft engine oil conforming to Exxon Oil formulation WS-3013.. Exxon Company USA
- [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector.. Aviation Development Corporation
- [STC SE5173NM](https://openairdocs.org/stc/SE5173NM): Installation of a replacement oil cooler adaptor, P/N ADC-310.. Aviation Development Corporation
- [STC SE2203NM](https://openairdocs.org/stc/SE2203NM): Installation of high compression pistons.. Godwin John B Jr
- [STC SE8023SW](https://openairdocs.org/stc/SE8023SW): Installation and usage of AEROSHELL. Shell Development Co
- [STC SE2606CE](https://openairdocs.org/stc/SE2606CE): Add unleaded and leaded automotive gasoline, 91 minimum antiknock index(RON+MON)/2 per ASTM Specification D-439.. Petersen Aviation Inc
- [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil.. Mobil Research & Development Corp
- [STC SE2035CE](https://openairdocs.org/stc/SE2035CE): Add the following approved fuel: unleaded automotive gasoline, 87 minimum antiknock index and leaded automotive gasoline, 88 minimum antiknock index (RON+MON)/2. Intermixing with aviation gasoline also approved. Petersen Aviation Inc
- [STC SE5879SW](https://openairdocs.org/stc/SE5879SW): Use of Phillips X/C II 20W-50 and25W-60 oil (OSS 55875) in all Avco reciprocating aircraft engines from 65 to 450 BHP.. Phillips Petroleum Co
- [STC SE5945SW](https://openairdocs.org/stc/SE5945SW): Grind mitrided choked engine cylinders .010-inch oversize and install .010-inch oversize pistons and rings.. Superior Air Parts
- [STC SE5924SW](https://openairdocs.org/stc/SE5924SW): Installation of stainless steel replacement exhaust studs on AVCO engines.. Perrigo & Steele Aircraft Engr Company
- [STC SE1976SW](https://openairdocs.org/stc/SE1976SW): Manufacture of new cylinder barrels and rebarreling with original cylinder head.. Gary Aerospace Corp
- [STC SE80NE](https://openairdocs.org/stc/SE80NE): Installation and usage of Bel-Ray synthetic aviation oil, Bel-Ray Aero 1, (nonsupercharged), horizontally opposed direct drive, aircraft engines of 350 hp. or less.. Bel-Ray Company, Inc
- [STC SE5791SW](https://openairdocs.org/stc/SE5791SW): Installation of any or all engine components parts or modifications on Avco 0-235 series engines.. Airmotive Engineering Corp
- [STC SE2364NM](https://openairdocs.org/stc/SE2364NM): Modification to lower horsepower rating from 118 H.P. at 2800 RPM to 115 H.P. at 2800 RPM for takeoff and 115 H.P. at 2700 RPM to 108 H.P. at 2600 RPM for maximum continuous.. Snohomish Flying Svc Inc
- [STC SE1445SO](https://openairdocs.org/stc/SE1445SO): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines.. ProTec
- [STC SE128NE](https://openairdocs.org/stc/SE128NE): Use of AMS/OIL 15W 50 synthetic piston aircraft oil in Avco engines.. AMS/OIL
- [STC SE5CE](https://openairdocs.org/stc/SE5CE): Prestolite ALK-5001 alternator.. Larsen Industries

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OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.