compensating carburetor, Same as 0-435-6 with wrap around crankcase and 4 pad turbocharger long reach spark plugs. carburetor, -C2D6 with angle generator drive (GO-480-B1C magneto, Same as O-540-E4A5 but with Bendix fuel injection, Same as -D4A5 but has -1200 series impulse coupling FOR FURTHER INFORMATION CONTACT: and 6260 pressurized magnetos, a different controller system This represents the basic cubic-inch displacement of the engine, but read on. Lycoming crankcase serial number Engine serial number stamping on Lycoming crankcase. IO-540-V4A5D sump, intake pipes and fuel injection A Definition of Aircraft Data Plates Aircraft data plates contain all of the vital information about an aircraft. dual magneto and has propeller governor drive on left dual magneto, Same as -A1G but with propeller governor drive on left Bill, you were right. supplied turbocharger system, Similar to -J2BD except with an intercooler and inch propeller bolts instead of 3/8 inch bolts. Some parts may be used, but they meet the same specifications as a new part. the property connectionacestorageentity principalid is immutable. magnetos, Integral accessory section crainkcase, front Browse our entire selection below. Account admin Service Bulletin Search Airworthiness Directives Same as -C2A but has provision for controllable prop. Year manufactured?? crankshaft, Similar to TO-360-MA6D but has left hand rotation carburetor, Same as -A2B with Retard Breaker Magnetos, Same as -E3D but with conical mounts and 0-320-A sump mounted to rear of engine and higher C.R. Reduction Gear Assembly, High compression GO-480-B1A6 piston cooling oil jets, Same as -G1D6 but with angle generator drive, Same as -G1A6 but with -1200 series Magnetos, Same as -G2D6 except for Retard Breaker Magnetos, Similar to GO-480-GU6 but has Bendix RSA-5AD1 Lycoming has issued Mandatory Service Bulletin 632 that requires owners to check their engines for connecting rods that contain bushings that do not meet Lycoming Engine's specifications within the next 10 hours of operation.. I called Lycoming and ran my case serials by them and they told me exactly what make and model I had That would only be if the engine is in the same configuration that it left the factory in. 2 for fixed-pitch propellers). heads, Same as -C1B but with D8LN-3200 Retard Breaker dual Those items will impact which table within the Instruction you need to consult for the proper spark plug part numbers. crankshaft, 14,000 feet at 3200 RPM, turbocharger Bendix fuel With a factory in Williamsport, Pennsylvania, Lycoming produces a line of horizontally opposed, air-cooled, four, six and eight-cylinder engines including the only FAA -certified aerobatic and helicopter piston engines on the market. Anyone know shop that will perform major engine repairs/overhauls on an OLD Lycoming O-435-C? injector adapter, Same as -K1A5 but with D6LN-3000 impulse coupling propeller flange bushings, Same as -H3AD but with D4RN-3200 retard breaker dual crankshaft, Similar to IO-320-C1A but has left hand rotation Any event during engine operation when the propeller has impact on a solid object which causes both a decrease in RPM and makes a structural repair of the propeller necessary. 2 for fixed-pitch propellers). You should copy out and cite relevant portions of the linked page, links die, pages change, sites get shut down, etc. Lycoming Engines is an Operating Division of Avco Corporation. You can get the service information identified in this ad from Lycoming, 652 Oliver Street, Williamsport, PA 17701; telephone (570) 323-6181; fax (570) 327-7101, or on the internet at www.Lycoming.Textron.com. counterweights, Same as -A1F6 but with D4LN-3000 impulse coupling dual has Bendix fuel injector, angle valve cylinders and The bushings were manufactured between November 2015 to February 2017. Piston cooling Also, did you know that Lycoming made the engine for the Dusenberg J series? Going 1 for constant speed propellers) or solid (No. a change in cylinder head design, Similar to -V2AD but with Slick 6261 (imp. Lycomings 390 Series four-cylinder engines produce 210 hp at 2,700 RPM. The TKS was a factory install and would be FIKI approved. S4LN-20 and S4LN-21 Magnetos, Same as -A1A with straight riser in oil sump and -32 var sc_invisible=1; crankshaft, Similar to TO-360-E1A6D but has left hand rotation Propeller strikes can be, but are not limited to, the following events: If you determine that you have had a propeller strike, a full tear down inspection is recommended. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. View Our Careers View Our History. July 2015 - Ever wonder where all the letters and numbers for Lycoming engines came from and what they all mean? Read the descriptions carefully to ensure that you or your mechanic are making a sound decision. crankshaft, Similar to HIO-360-C1B but has left hand rotation This indicates a Bendix dual magneto in a single-case driven by a single-drive. You should treat field overhauled engines or engines that have recently had a cylinder changed differently. dual magneto, pressure controller, provision for cabin Is there a proper earth ground point in this switch box? two S4LN-21 impulse coupling magnetos and AN fuel pump drive, Same as -CIA but with fuel injector mounted straight to the rear and 24 volt system standard, Same as O-320-D2C except has Bendix RSA-5AD1 fuel injector, provision var sc_partition=19; train and related drive system, Similar to -A4A5 except for rating, speed, D6LN-3000 shaft and single oil supply, Conversion of -G1D6 to low compression for fuel pump, external mounted oil pump and D4RN-3000 Similar to IO-540-M2AD with front air inlet, provision dia. coupling dual magneto system along with the dual on the accessory housing and the turbo scavenger pump crankshaft, Similar to 0-360-A1F6D but with HA-6 horizontal Engine Serial Number Print All of the information provided herein is subject to verification by the user. Same as -D2C but with provision for controllable prop. Engine Serial Number Search and AN fuel pump drive, Same as -A~ but equipped with S8LN-1208 and -1209 2. and without either induction air cooler or cabin bleed, Similar to -U2A but has (2) Garrett instead of It has a zero time since new and a zero time since major overhaul. Magnetos, Same as -L1A5 but with D6LN-3000 impulse coupling dual All Lycoming Engines have a recommended calendar overhaul of 12 years regardless of the time on the engine. The serial number can be found stamped in the case halves. bushings, Same as -B1A except for Retard Breaker Magnetos, Same as -B1A except for fixed pitch propeller, Same as -B2A except for Retard Breaker Magnetos, Same as -B2A except has IO-360-A crank and rods, Same as -CIA except for Retard Breaker Magnetos, Same as -A1G with conical mounts and Slick magnetos, Same as -CIA but with propeller governor drive on These engines are identical to what an OEM customer (such as Cessna or Piper) would be installing into their brand new aircraft. I've tried googling different searches but can't come up with anything. Same as -E3D but equipped with S4LN-20 and -21 Mags. Portions of the website, including membership login, join, renewal, shopping, and AirVenture ticketing may be unavailable at that time. Donate methods turbocharger, Identical to -J2BD except turbocharger shifted one-half Here it gets murky. The bell housing is where the transmission mounts to the engine and is cast solid with the engine block. These pumps were the first models to incorporate the oil seal integrated with the upper diaphragm and a separator ring for installation of the vent / overboard drain line. Same as -E2D but equipped with S4LN-20 and -21 Mags. Close. fuel injection system, Same as O-540-A1D5 but with Bendix fuel injector, Conversion of O-540-A2B to Bendix fuel injection and Use MathJax to format equations. That link shouldn't be going anywhere. propeller flange bushings, Same as -A4G but has -21 and -204 Magnetos, Same as -A4M but has an unmachined governor pad on Same as -B1D 70414 or no. magnetos (GO-435-C2B with 5-1/8 in. Same as -C1 but has provision for controllable prop. Lycomings 540 Series six-cylinder engines are powerful and durable, producing 235 to 360 hp at up to 2,700 RPM. I have an O235-L2C, serail number L-16502-15. bore), Dry sump, crosswise accessones (H. C. GO-480-D), High compression GO-480-B1D with 1.75 venturi Aviation Stack Exchange is a question and answer site for aircraft pilots, mechanics, and enthusiasts. left front of crankcase, Same as -CIA but fixed pitch propeller and horizontal fuel injector and 90_ fuel injector mount, Similar to HO-360-B1B but has Bendix fuel injector mounting pads machined and studded, Same as -A1A except for low tension ignition system, Similar to -A1A but equipped with RSA-10DB1 fuel injector, RG-9080-J7 fuel pump, S6RN-1208 and -1209 magneto, Similar to -L1A5D except for a modified oil sump, Same as -L1A5 but has diaphragm type fuel pump and I just bought an airboat with the engine serial number L-34444-27A and I believe it is a O320 but not sure. The engine serial number on early Flatheads (1948 and below) is cast on top of the bell housing. You always have the option to reduce your oil change interval and check again. I got the following information for this website: Also if you scroll down here you can see the model numbers that you talk about in your question. Typical timing marks on a Lycoming engine are located on the forward face of the ring gear. [3] 3. moved to the vacuum pump pad and more effective and S6RN-12O9 magnetos, Same as TIO-540-J2BD but has reverse rotation, Similar to TIO-540-N2BD but has left hand rotation conical mounts, Same as -B1A but conical rubber mounts and -1200 series Why trust anyone but the world's largest distributor of Lycoming aircraft engines? controllable propeller, an RSA-5AD1 fuel injector, Aircraft Engine Serial Number O-320-A1, O-320-B1, and O-320-C1 or O-320-A2, O-301-B2, and O-320-C2 The numbers after the first letter determine whether the crankshaft is hollow (No. Lycoming provides an oil MIL and SAE specification for the oil you should use. The initial engines - IO-320-A1, IO-320-B1, and IO-320-C1 - were made for constant-speed propellers with 3/8-inch attachment bolts. Cookies are required for this site to operate correctly. Sometimes engines react differently depending on the aircraft in which they are installed. rating, Same as -E~4 but has no provision for cabin pressurization, Same as -E1A4 but has 1~1879 turbocharger, Same as -E1B4 but has 1~1879 turbocharger, Turbocharged (T18A21), fuel injected (RSA-l0-DBl), Tom-D, Jun 13, 2011 #1 Skylane81E Final Approach Joined: May 3, 2011 Messages: 8,059 Location: coupling accessory drive, Turbocharger (T-1823), fuel injected (RSA-10-ADV, mounts, Similar to O-360-A1G6D but has left hand rotation have -C2B reduction gear, PS-5 carburetor, Std. -20 and -21 magnetos), -23 with wrap around crankcase and 4 pad sump, -23A with altitude compensating carburetor, Same as -23B except has spring coupling accessory drive, -A1B with AN-I-27 harness and magnetos, altitude turbocharger, Similar to -A1B except equipped with a D4LN-3000 I bought it in June of 2008 as a zero time rebuild. and uses 3/8 inch attaching bolts and has alternate rating of Lycomings four-cylinder 320 Series engines produce 150 or 160 hp at 2,700 RPM. pump or hydraulic pump drive, -A1B with wrap around crankcase, new oil sump fuel Well equipped aircraft with Oxygen and TKS anti-ice system. provision for propeller governor, Same as -A4M except for propeller flange bushings and attaching bolts, Same as -D2A except for Retard Breaker Magnetos, Same as -D2A except for -1200 series Magnetos, Same as -E2F except has high compression pistons, Same as -D2A but with Slick Magnetos, 7/16 instead Most aircraft reciprocating engines have timing reference marks built into them. and intake pipes, Same as -A1A but uses 7/16 in. use with Hartzell propeller, Similar to -S1A5 except for compression ratio, Same as -AA1A5 except has impulse magneto and higher rating, Low compression vertical PS-7BD carburetor, Same as -A1A but with spring coupling accessory drive, Same as -B1A except for Retard Breaker Magnetos With models producing up to 125 hp at 2,800 RPM, this engine powers many aircraft around the world. mounted fuel pump, external oil pump, D4RN-3000 impulse ratio, Similar to -C2B but higher power and comp. NunavutPA-12. reduction gear, Fuel grade depends on carburetor setting GO-435-C2 This engine choice makes sense for the customer that likes to have the peace of mind of having everything be brand new. THIS IS NOT SUPPORTED BY OR ENDORSED BY TEXTRON LYCOMING. turbocharging, -F~ with propeller shaft converted to single oil Must be affixed to the engine at an accessible location; and (3) Must be secured in such a manner that it will not likely be defaced or removed during normal service, or lost or destroyed in an accident. 3. carburetor and turbocharger location and turbocharger Does that number mean anything? A number of manufacturers produce non -certified engines based on Lycoming designs and these are termed 'cloned' Lycoming engines by LAA Engineering. and type 2 dynafocal mounts, Same as -B1A but with two (2) S4LN-200 Magnetos, Same as -A1A but has -1200 series impulse coupling Air Power, Inc. has been informed by Continental Aerospace Technologies of a potential safety-of-flight issue for aircraft equipped with Continental 360, 470, 520 and 550 series engines and replacement crankshaft assemblies. dual magneto and has a rear type engine -A1D5 counterweights, Same as -G1A5 but does not have provision for This engine also carries a one-year factory warranty up to the hourly overhaul period listed in Service Instruction 1009. order counterweights, Similar to -BIB but has S4LN-21 (impulse coupling) crankshaft, Same as TIO-540-F2BD but has reverse rotation, Same as -J2BD but have S6RN-1208 (Retard Breaker) Why is the RPM limit on a Lycoming IO-540 different in the -C and -D versions? Breaker Magnetos, Similar to -E4C5 except has stiffer crankshaft and D6LN-3000 impulse coupling dual magneto, Same as -U1A5D but has diaphragm type fuel pump and Any help would be appreciated. and has provision for a rear mounted propeller governor, Same as -AA1AD but has bottom mounted fuel injector, a weight reduction, Same as -J~D but with D6LN-3200 retard breaker rotated 120 degrees clockwise, Same as O-360-A1D except for Simmonds 530 Fuel hydraulic pump drives, GO~480-B1B with flanged propeller shaft sixth order In these cases, those parts are overhauled by a reputable overhaul facility. Lycoming. propeller bolts, Same as -A3A except for straight riser in oil sump and magneto, Same as -A3A except for Retard Breaker Magnetos, Same as -A4A but with D4LN-3000 impulse coupling dual coupling dual Magneto, Same as -A1A but with -1200 series Magnetos, Same as -A1B but has S4LN-21 impulse coupling and So these letters refer to various combinations of carburetor and injector locations and Type 1 or Type 2 Dynafocal- or conical-mount configurations. Service Bulletin 533, "Recommended Actions for Sudden Stoppage, Propeller/Rotor Strike or Loss of Propeller/Rotor Blade or Tip," defines what qualifies as a propeller strike, and what action you need to complete if you experience a propeller strike. The Lycoming O-235 is a family of four-cylinder, air-cooled, horizontally opposed piston aircraft engines that produce 100 to 135 hp (75 to 101 kW), derived from the earlier O-233 engine. Turns out my engine was made in June 1978 and was sold to Piper in April 1979. The suction screen and oil filter are your engines way of telling you it needs attention. large fuel pump, conduit harness and pressurized Mags. Many people look for this to order a head or some other engi. Posted December 28, 2015 The original mushroom lifters in lycomings came from the 1936 Oldsmobile. You must log in or register to reply here. (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), high pressure fuel pump, piston cooling oil jet and Modern VIN numbers are made up of 17 digits, both numbers, and letters. Notes: 1. It's that simple. What may be the cause of hot start problems in a Lycoming fuel injected engine? temperature response, Similar to -A1B but has revised controller setting, IO-540-J4A5 equipped with TE0659 turbocharger and The Early Model Lycoming Fuel Pump (40174/40295 low pressure, 40595 medium pressure, 40296 high pressure) In the spring of 1964, AC introduced the first dual diaphragm type fuel pumps. 1 for constant speed propellers) or solid (No. rating, 15,000 feet @ 3200 RPM, turbocharged vertical 2Some engine specification numbers may be enclosed in parenthesis. and low drag cylinder heads, Similar to -D1A but has D6RN-3200 retard breaker dual dual magneto, Similar to -KIA5 but has two impulse coupling magnetos Cool. I called Lycoming this morning and they were great. Look at your dashboard. Thanks, Cracker These engines power numerous popular aircraft produced by companies like Cessna, Piper, and kit manufacturers such as Vans and Glasair. So when the roller lifters came along, lycoming still managed to stick it to you. 3B= Wood crate, F= Factory packaging Table 1. Is variance swap long volatility of volatility? and dual diaphragm fuel pump, Similar to -A1A but has higher sea level rating and relocated turbocharger and a D6LN-3000 impulse coupling magnetos, Same as -D4B5 but with Retard Breaker Magnetos, Same as -B1C5 but with piston cooling oil jets, Same as -E1A5 but with -1200 series Magnetos, Same as -E1B5 with RSA-10ED1 fuel injector, Same as -A1A5 but with piston cooling oil jets, Similar to -G1A5 but has -1200 series Magnetos and Same as -E2A except for Retard Breaker Magnetos, Same as -E2A but has -1200 series Magnetos, Similar to -E2A but with Slick Magnetos, O-235 front and Slick magnetos, Same as IO-540-D4A5 but is equipped with Aerobatic kit, Same as IO-540-D4B5 but is equipped with Aerobatic kit, Same as IO-540-D4C5 but is equipped with Aerobatic kit, Same as -L1B5D but has Slick 6251 (impulse coupling) Magnetos, Same as -A1B but with D8LN-3200 Retard Breaker WE know the S/N and we have logs. All Lycoming factory new, rebuilt and overhauled engines are built on the same production assembly line. D4LN-3000 impulse coupling dual magneto and provision Service Instruction 1492, Piston Pin Plug Wear Inspection, provides information on what to do if you find metal in your filter. This engine choice is for the customers who are looking to have a return on their investment by adding value to their airframe. New engines carry a two-year factory warranty up to the hourly overhaul period listed in Service Instruction 1009. On late model flatheads without the bell housing cast into the block (1949-1954), the number is located . The VIN is a unique number that can help you know important information about a snowmobile or any other vehicle. Anything? Aerobatic kit, Same as -K1A5 except has different propeller bushings, Similar to -K1A5 but with front air inlet and Retard PS-5 carburetor with 1.75 venturi fuel pump and magnetos, Same as -A1B but has (1) sixth and (1) eighth order injector, Same as -CIA but with Type 1 dynafocal mounts, Similar to IO-320-BL~ but has left hand rotation and has a variable pressure controller, Same as -J2BD except for a modified exhaust magneto accessory housing and related drive system, Same as -H1A5 but equipped with D6LN-3200 dual magneto, Same as -K1A5 but has diaphragm type fuel pump and Why do piston engines in aircraft burn fuel at a higher rate than a comparable car engine? How can the mass of an unstable composite particle become complex? Same as -E2D but uses 3/8 inch instead of 7/16 inch Anything? ratio and lower power, Similar to -L2A but with provision for controllable If the oil brand you choose meets or exceeds those specifications, then it is approved for use in your Lycoming engine. drive, Same as -K1F5D but has diaphragm type fuel pump and Almost all carburetors and injectors are mounted in the bottom, and almost all injectors are mounted in the bottom. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Same as -D2 but new crankcase for controllable prop. Similar to -C1 but higher power and comp. We want to make sure that the people who know your engine best are the ones taking care of it at TBO. front of crankcase. counterweights, provision for 3-bladed propeller, The suffixes are just arbitrary identifiers for significant configuration differences, but there is a bit of a breakdown on Page i of the PDF. How can I explain to my manager that a project he wishes to undertake cannot be performed by the team? train and related drive system, Same as -H1A5 but with fixed pitch propeller, Same as -H2A5 but equipped with D6LN-3000 impulse Most of the systems on Lycoming engines are mechanical, meaning they do not rely on electronics. That's why we offer discounts of up to $6,500 for bringing your original factory engine back to us at TBO. and straight injector adapter, Same as -K1B5 but with D6LN-3000 impulse coupling dual propeller attaching bolts Is there a way to trace the history of an engine by its serial number? injector adapter, Same as -G1C5 but has straight injeecor inlet, Same as -G1A5 but has -1200 series Magnetos, Same as -G1E5 but with (2) impulse coupling Magnetos, Same as -C4B5 except comersion for use with turbo- counterweights, Same as -A1G6 but with D4LN-3000 impulse coupling Therefore, the break in process has already been started for you. and S4LN-20 magnetos and provision for straight conical Learn more about Lycoming and its early history as a sewing machine company here. -32 carburetor, Same as -A3B except for Retard Breaker Magnetos, Same as -B1A except for straight riser in od sump and ga('send', 'pageview'); Same as -C1 but has AS-127, Type 1 propeller flange. Finally, the letter following the central number determines the accessories installed. Same as -C2B but has provision for controllable prop. RSA-10-AD1 fuel injector and -1200 series Magnetos, Same as -A1A but has density controller with faster magneto, Similar to -M1A5D but with RSA-10ED1 fuel injector, How to lean with constant speed prop on multi-engine aircraft without EGT. Keep VAF mount similar to TO-360-F1A6D. Lycoming O-290 Series Engines . drive, Similar to -K1A5 except modified for use with an fuel injector, Similar to GO~80-G1A6 but has Bendix RSA-5AD1 ratio and lower power, Same as -F2B but with 20_ BTC timing, lower comp. kit, Kaman Helicopter Std. magneto accessory housing and related drive system, Same as -H2A5 but equipped with D6LN-3200 dual The flagship of our innovation, equipped with state-of-the-art aviation electronics and sensors for a modern flying experience. Retard Breaker Magnetos, Similar to -B1E except converted for use with Continental Motors, Inc. makes no representation or warranty concerning the accuracy or completeness of the information and assumes no responsibility with respect thereto. The 320 Series also powers the early Robinson R22 helicopter. Lycoming factory engines are test run and inspected for leaks before leaving our factory. Be sure to review their recommendations at FAA.gov before returning the aircraft to service. This type of incident includes propeller strikes against the ground. Connect and share knowledge within a single location that is structured and easy to search. drive, Same as -K1A5D but has diaphragm type fuel pump and Consequently, Continental has issued Mandatory Service Bulletin MSB23-01 and asked Air Power to distribute to our customers. -POSTING RULES Single-cylinder, air-cooled, direct-drive, spark-ignited two-stroke engine controlled by the Electronic Control Unit. Additional gasoline engine configuration code examples: Figure 2 demonstrates a typical CMI jet fuel (diesel) engine configuration scheme: Figure 2. high pressure fuel pump and is equipped with Aerobatic If either the engine model and serial number or cylinder kit number is listed in Table 1 or 2 then each individual cylinder must be inspected for visible damage, the manufacturing lot code and the Lycoming part number. for use with Hartzell "compact" propeller, Same as rBlB5 but with more effective counterweights Your browser is not compatible with this website. The first engine in this series was the E165, a 471 cubic inch (7.7 L) engine producing 165 hp (123 kW), and was the first of the Continental's "E" series engines. of 3/8 in. So what *is* the Latin word for chocolate? You can find the position of your plate using the table below. The Federal Aviation Administration (FAA) is the National Airworthiness Authority (NAA) responsible for the issue of State of Design Airworthiness Directives (ADs) magneto system, dual magneto accessory housing, gear If so, then proceed to paragraph 5.2. counterweights for McCauley propeller, Similar to -AA1AD but has Slick magnetos, different propeller flange bolts, Same as -D2G but with 0-320-B sump and intake pipes The break-in period of your engine is also a critical stage of your engine's life. But no data tag. Integral accessory section cIankcase, front mounted Clean, fresh oil is a low-cost way to keep other maintenance costs low. (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ prop. If you operate your engine in dusty areas or airports where it may encounter salt spray, oil changes should be completed earlier than what is prescribed in the Service Bulletin. It only takes a minute to sign up. Same as -A1A5 but with more effective counterweights for use with Hartzell "compact" propeller, Same as -A1B5 but with more effective counterweights for use with Hartzell "compact" propeller, Same as -A1C5 but with more effective counterweights for use with Hartzell "compact" propeller, Same as -A1D5 but with more effective counterweights for use with Hartzell "compact" propeller, Same as -B1A5 but with impulse coupling 35-KV generator drive, Fuel grade depends on carburetor setting Ryan Navion MA-4-5 carburetor _, Beech, PS-5 carburetor, dual governor and vacuum pump Learn more about Stack Overflow the company, and our products. coupling dual magneto system along with the dual Locate the engine serial number. Call Lycoming, they're very helpful. The D indicates Dual Magnetos and the 2 or 3 seems to indicate some type of counterweight application. Is there any chart or tabel for decode suffixes? injector, High compression tuned induction, Bendix fuel injector Later versions were given the company designation of E185 (185 hp (138 kW) continuous) and E225 (225 hp (168 kW)). ratio, Same as -C1A6D with long type 1.12,, conical mount, Vertical crankshaft (Brantly Modification), Same as -A1A except for altitude compensated carburetor Year manufactured?? oil supply for Hartzell propeller with conversion kit carburetor, Same as -B1H6 except Torsional Damper System has been drive, Same as -K1F5 but has diaphragm type fuel pump and