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This List Is Not Guaranteed to Be Accurate Nor up to Date SSP -393:Certificated Engine List Page 1 of 33 WARNING: THIS LIST IS NOT GUARANTEED TO BE ACCURATE NOR UP TO DATE. THIS IS NOT SUPPORTED BY OR ENDORSED BY TEXTRON LYCOMING. DO NOT USE ANY OF THIS INFORMATION FOR THE OPERATION OR MAINTENANCE OF ANY AIRCRAFT ENGINE. THIS INFORMATION IS PRESENTED FOR EDUCATIONAL PURPOSES ONLY Nomenclature Lycoming's specific convention for post-WWII aircraft piston engine designation is as follows. Note that this convention is fairly standard and applicable to many other manufacturers. General Format: C-D-M Where: C Letters indicating the engine's configuration: I Fuel injected O Opposed type (pancake-style) X X-type engine R Radial type engine G Engine is geared T Engine is turbocharged S Engine is supercharged L Engine is left-turning A Engine is designed for aerobatics (DRY SUMP) AE Engine is designed for aerobatics (WET SUMP) M Engine is designed for unmanned drone (UNCERTIFIED) H Engine is designed for helicopter installation V Engine is designed to have the crankshaft in the vertical, not horizontal, plane. Usually implies "H" D The engine's displacement in cubic inches. M Configuration. Includes power rating, nose section, accessory section, counterweight application, and magneto application. Example from the Lycoming Overhaul manual: TIO-541-E1B4D http://www.prime -mover.org/Engines/Lycoming/Lyc_Cert_list.html 1/26/2007 SSP -393:Certificated Engine List Page 2 of 33 Where: TIO - The prefix as described above. 541 - The engine's cubic inch displacement, as described above. A 1 at the end indicates an integral accessory drive (e.g. TIO-541) except for the 76 series engines (see below). E - Power section and power rating for the displacement 1 - Nose section (provisions for a prop governor, hollow/solid crankshaft, prop governor location) B - Accessory section (fuel pump type, accy pad(s), etc.) 4 - Counterweight application (if applicable, see the power section to determine this) D - Dual magneto (if applicable) PISTON - (4) FOUR CYLINDER SERIES T/O Model HP Fuel C.R. DESCRIPTION Suffix RPM O-235- 115 2800 80 6.75:1 Basic engine -15 C1 O-235- 115 2800 80 6.75:1 Same as -C1 with Retard Breaker Magnetos -15 C1B O-235- 115 2800 80 6.75:1 Same as -C1 but with Slick Magnetos -15 C1C O-235- Same as -C1 but has AS-127, Type 1 propeller 115 2800 80 6.75:1 -15 C2A flange O-235- 115 2800 80 6.75:1 Same as -C2A with -1200 series Magnetos -15 C2B O-235- 115 2800 80 6.75:1 Similar to -C2A but with Slick Magnetos -15 C2C O-235- Same as -C1 but has provision for controllable 115 2800 80 6.75:1 -15 E1 prop. O-235- Same as -C1B but has provision for controllable 115 2800 80 6.75:1 -15 E1B prop. O-235- Same as -C2A but has provision for controllable 115 2800 80 6.75:1 -15 E2A prop. O-235- Same as -C2B but has provision for controllable 115 2800 80 6.75:1 -15 E2B prop. O-235- 125 2800 100/100LL 9.70:1 Similar to -C1 but higher power and comp. ratio -15 F1 http://www.prime -mover.org/Engines/Lycoming/Lyc_Cert_list.html 1/26/2007 SSP -393:Certificated Engine List Page 3 of 33 O-235- 125 2800 100/100LL 9.70:1 Similar to -C1B but higher power and comp. ratio -15 F1B O-235- Similar to -C2A but higher power and comp. 125 2800 100/100LL 9.70:1 -15 F2A ratio O-235- 125 2800 100/100LL 9.70:1 Similar to -C2B but higher power and comp. ratio -15 F2B O-235- Same as -F1 but with provision for controllable 125 2800 100/100LL 9.70:1 -15 G1 prop. O-235- Same as -F1I but with provision for controllable 125 2800 100/100LL 9.70:1 -15 G1B prop. O-235- Same as -F2A but with provision for controllable 125 2800 100/100LL 9.70:1 -15 G2A prop. O-235- Same as -F2B but with provision for controllable 125 2800 100/100LL 9.70:1 -15 G2B prop. O-235- 115 2800 80 6.75:1 Same as -C2C but with Type 1 dynafocal mounts -15 H2C O-235- 125 2800 100/100LL 9.70:1 Same as -F2A but with Type 1 dynafocal mounts -15 J2A O-235- 125 2800 100/100LL 9.70:1 Same as -F2B but with Hope 1 dynafocal mounts -15 J2B O-235- Same as -F2A but with 20_ BTC timing, lower 118 2800 100/100LL 8.50:1 -15 K2A comp. ratio and lower power O-235- Same as -F2B but with 20_ BTC timing, lower 118 2800 100/100LL 8.50:1 -15 K2B comp. ratio and lower power O-235- 118 2800 100/100LL 8.50:1 Same as -K2A but with Slick Magnetos -15 K2C O-235- Same as -J2A but with 20_ timing, lower comp. 118 2800 100/100LL 8.50:1 -15 L2A ratio and lower power O-235- 118 2800 100/100LL 8.50:1 Same as -L2A but with Slick Magnetos -15 L2C Similar to -L2A but with provision for O-235- 118 2800 100/100LL 8.50:1 controllable prop. and has AS-127, Type 2 prop. -15 M1 flange O-235- Similar to -M1 but has AS-127, Type 1 propeller 118 2800 100/100LL 8.50:1 -15 M2C flange and Slick magnetos. O-235- Similar to -M1 but has Slick magnetos and uses 118 2800 100/100LL 8.50:1 -15 M3C 7/16 inch propeller bolts instead of 3/8 inch bolts. O-235- 116 2800 100/100LL 8.10:1 Same as -L2A but lower comp. ratio and power -15 N2A O-235- 116 2800 1O0/100LL 8.10:1 Same as -L2C but lower comp. ratio and power -15 N2C O-235- 116 2800 100/100LL 8.10:1 Same as -M1 but lower comp. ratio and power -15 P1 http://www.prime -mover.org/Engines/Lycoming/Lyc_Cert_list.html 1/26/2007 SSP -393:Certificated Engine List Page 4 of 33 O-235- Similar to -P1 but has AS-127, Type 1 propeller 116 2800 100/100LL 8.10:1 -15 P2A flange O-235- 116 2800 10O/100LL 8.10:1 Same as -M2C but lower comp. ratio and power -15 P2C O-235- 116 2800 1OO/100LL 8.10:1 Same as -M3C but lower comp. ratio and power -15 P3C T/O Model HP Fuel C.R. DESCRIPTION Suffix RPM O-290-D 130 2800 80 6.50:1 Solid tappets, Hydro control -21 O-290-11 127 2800 80 6.50:1 Same as O-290-D -21 O-290- 140 2800 80 7.50:1 Hydraulic tappets, 18 degree spark advance -21 D2 O-290- Same as -D2 but new crankcase for controllable 140 2800 80 7.50:1 -21 D2A prop. O-290- 140 2800 80 7.00:1 Same as -D2, 25_ spark advance and lower C.R. -21 D2B O-290- 140 2800 80 7.00:1 Same as -D2B with Retard Breaker Magnetos -21 D2C T/O Model HP Fuel C.R. DESCRIPTION Suffix RPM O-320- Controllable propeller, 25 degree spark advance 150 2700 80 7.00:1 -27 A1A Bendix S4LN-20 and S4LN-21 Magnetos O-320- Same as -A1A with straight riser in oil sump and 150 2700 80 7.00:1 -27 A1B -32 carburetor O-320- 150 2700 80 7.00:1 Same as -A1A but fixed pitch propeller -27 A2A O-320- Same as -A2A with straight riser in oil sump and 150 2700 80 7.00:1 -27 A2B -32 carburetor O-320- 150 2700 80 7.00:1 Same as -A2B with Retard Breaker Magnetos -27 A2C O-320- Same as -E3D but with conical mounts and 0- 150 2700 80 7.00:1 -27 A2D 320-A sump and intake pipes O-320- Same as -A1A but uses 7/16 in. dia. propeller 150 2700 80 7.00:1 -27 A3A bolts O-320- Same as -A3A except for straight riser in oil 150 2700 80 7.00:1 -27 A3B sump and -32 carburetor O-320- Same as -A3B except for Retard Breaker 150 2700 80 7.00:1 -27 A3C Magnetos O-320- 160 2700 100/100LL 8.50:1 Same as -A1A but high C.R. -39 B1A O-320- Same as -B1A except for straight riser in od 160 2700 I00/100LL 8.50:1 -39 B1B sump and -32 carburetor O-320- http://www.prime -mover.org/Engines/Lycoming/Lyc_Cert_list.html 1/26/2007 SSP -393:Certificated Engine List Page 5 of 33 B2A 160 2700 100/100LL 8.50:1 Same as -B~ fixed pitch propeller -39 O-320- Same as -B2A except for straight riser in oil 160 2700 100/100LL 8.50:1 -39 B2B sump and -32 carburetor O-320- Same as -B2B except for Retard Breaker 160 2700 100/100LL 8.50:1 -39 B2C Magnetos O-320- Same as -DID except fixed propeller and conical 160 2700 100/100u 8.50:1 -39 B2D mounts O-320- Same as -B1A except for 7/16 inch propeller 160 2700 100/100LL 8.50:1 -39 B3A attaching bolts O-320- Same as -B~ except for 7~6 inch attaching bolts 160 2700 100/100LL 8.50:1 -39 B3B and straight riser in oil sump and -32 carburetor O-320- Same as -B3B except for Retard Breaker 160 2700 100/100LL 8.50:1 -39 B3C Magnetos O-320- Low compression field service conversion of - 150 2700 80 7.00:1 -39 C1A B1A O-320- Low compression field service conversion of - 150 2700 80 7.00:1 -39 C1B BIB O-320- Low compression field service conversion of - 150 2700 80 7.00:1 -39 C2A B2A O-320- Low compression field service corrversion of - 150 2700 80 7.00:1 -39 C2B B2B O-320- Low compression field service conversion of - 150 2700 80 7.00:1 -39 C2C B2C O-320- Low compression field service conversion of - 150 2700 80 7.00:1 -39 C3A B3A O-320- Low compression field service conversion of - 150 2700 80 7.00:1 -39 C3B B3B O-320- Low compression field service conversion of - 150 2700 80 7.00:1 -39 C3C B3C O-320- 160 2700 100/100LL 8.50:1 Same as -B3B but with Type 1 dynafocal mounts -39 D1A O-320- 160 2700 100/100LL 8.50:1 Same as -D~ except for Retard Breaker Magnetos -39 D1B O-320- Same as -D2C but with provision for controllable 160 2700 100/100LL 8.50:1 -39 D1C prop.
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