IO-90- Series Engine Illustrated Parts Catalog July 20 PC-IO-90- (Supersedes PC-409-) 20 52 Oliver Street Williamsport, P 770
IO-90- Series Engine Illustrated Parts Catalog Lycoming Part Number: PC-IO-90- (Supersedes PC-409-) For additional information: Mailing address: Lycoming Engines 52 Oliver Street Williamsport, P 770 U.S.. Phone: Factory: U.S. and Canada toll free: +(800) 258-279 International Customers: +(570) 2-8 Lycoming s regular business hours are Monday through Friday from 8:00.M. through 5:00 P.M. Eastern Time (-5 GMT) Visit us online at: www.lycoming.com 20 Lycoming. ll Rights Reserved. Lycoming and Powered by Lycoming are trademarks or registered trademarks of Lycoming. Lycoming Engines, a division of VCO Corporation. ll brand and product names referenced in this publication are trademarks or registered trademarks of their respective companies.
IO-90- Series Engine Illustrated Parts Catalog Record of Revisions NOTICE: Service Documents override parts information in this document. Rev No. Issue Date Initials Insertion Date PC-IO-90-7/20/20 WS/PG Supersedes PC-409- Effectivity: IO-90- Series Engine Record of Revisions Page iii Lycoming Engines is a division of vco Corporation July 20
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IO-90- Series Engine Illustrated Parts Catalog Table of Contents Subject Chapter - Section Page Frontal Record of Revisions... iii Table of Contents... v Introduction... vii bbreviations and cronyms... xi Oversize and Undersize Part Listing... xiii Electrical Power 24-00 C Generation... 24-20. lternator ttaching Parts... 0-2. lternator ssembly and elt... 4-5 Reciprocating Engine 72-00 Front Section... 72-0. Propeller Governor Drive ssembly, dapter ssembly, Covers, and Related Parts... 7-9 Power Section... 72-20. Crankcase ssembly... 0-2. Crankcase Related Parts... 4-5. Crankshaft and Counterweight ssembly and Related Parts... -7 4. Crankshaft Idler Gears, Tachometer Drive, and Camshaft... 8-9 5. Crankcase ttaching Parts... 20-2 Cylinder Section... 72-0. Connecting Rods, Pistons, and Ring ssemblies... 22-2 2. Cylinder ssembly... 24-25. Valve ssembly and Related Parts... 2-29 4. Cylinder Related Parts... 0-5. Cylinder Head Drain Tubes and Intercylinder Cooling affles... 2-. Intake Pipes ssembly... 4-5 Lubrication System... 72-50. Oil Level Gage... -7 2. Oil Sump ssembly and Oil Suction Screen... 8-9 ccessory Drives... 72-0. ccessory Housing ssembly... 40-4 2. Oil Pump ssembly and ccessory Housing ttaching Parts... 42-4. Fuel Pump and ttaching Parts... 44-45 Effectivity: IO-90- Series Engine Table of Contents Page v Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Subject Chapter - Section Page ccessory Drives (Cont.)... 72-0 4. Propeller Governor Oil Line Tube ssembly and ttaching Parts... 4-47 5. Vacuum Pump Drive and Cover... 48-49. Oil Filter ssembly, Oil Cooler ypass Valve, and Fittings... 50-5 Engine and Fuel Control 7-00 Fuel Distribution... 7-0. Fuel Injector, Fuel Manifold ssembly, and rackets... 52-5 2. Fuel Lines, Fuel Hoses, and ttaching Parts... 54-57 Ignition Distribution System 74-00 Distribution... 74-20. Magnetos, Magneto Drives, Harnesses, and Spark Plugs... 58-59 Starting 80-00 Cranking... 80-0. Starter Motor and ttaching Parts... 0- ack Section Service Kit Section...... 2-4 Numerical Index...... 5-9 Table of Contents Page vi July 20 Effectivity: IO-90- Series Engine Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Purpose of this Catalog Introduction DO NOT USE THIS CTLOG S N SSEMLY OR INSTLLTION DOCUMENT. THIS CTLOG MUST ONLY E USED TO IDENTIFY PRTS IN CONJUNCTION WITH THE PPLICLE OVERHUL MNUL. This Illustrated Parts Catalog (IPC) contains a complete list of spare parts for the Lycoming IO-90- series engine models. How to Use this Catalog This catalog is based on the ir Transport ssociation (T) Spec 00 format. In order to clarify illustrations, Lycoming has taken discretion to classify non-system related assemblies and components in the same chapters, because they are physically connected. This catalog is frequently updated by Service ulletins (S) and Service Instructions (SI). The updated information will be incorporated into subsequent full revisions of this catalog. The T two element numbering system provides consistency throughout various manuals. The bottom of each page (beyond the frontal section) contains a two element number (##-##). In the two element numbering, the first two digits represent a chapter, and the next two digits subdivide the material into a more specific section. The T format specifies the subject matter for each chapter-section. ccording to the T Standards, the following chapters apply to the IO-90- Series Illustrated Parts Catalog: 24 (Electrical Power), 72 (Reciprocating Engine), 7 (Engine and Fuel Control), 74 (Ignition), and 80 (Starting). NOTICE: Numerical Index EXMPLE: 74 20 Chapter Ignition Section Distribution See the IPC Table of Contents for the sub-systems identified in each section. The Numerical Index is a single list of part numbers, names and their locations within the IPC. It is useful for locating parts when you only know the number or name of the part. Description column Indentation of a part name represents a lower level of assembly. ttaching parts have the same indentation level and are below their associated parts grouping or assembly. This column is often referred to as the "Nomenclature" on other T Spec manuals. Units per ssembly Column Where more than one assembly exists, this column contains the quantity of a specific part required in the build sequence of only one next higher assembly. The letters R are for as required applicable to bulk items or non-illustrated select-from-range-parts. The letters RF identify items listed for reference. Effectivity: IO-90- Series Engine Introduction Page vii Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Vendor ccessories Parts coverage of Vendor ccessories used on Lycoming engines are found in the applicable Vendor s Parts Catalog. list of vendors addresses is included in the latest revision of Lycoming Service Letter No. L4. ny reference in this document to the suppliers/part manufacturer s product, by name, trademark, part number or other description is solely for the purpose of identification and does not indicate or infer that Lycoming accepts responsibility for quality control and/or airworthiness of parts, which do not pass through the Lycoming quality control system. Environmental Compliance Lycoming is concerned with preserving the environment. Lycoming strongly urges engine owners and repair/overhaul personnel to observe and comply with all federal, state, and local environmental regulations when solvents, paint, fuel, oil, chemicals, or other consumables are used in operating, maintaining, or overhauling an engine component. Please share our concern for and commitment to a clean earth, clean water, and especially clean air for succeeding generations of flyers. Introduction Page viii July 20 Effectivity: IO-90- Series Engine Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Perspective of References In this manual, all references to locations of various components will be designated as if viewing the engine from the rear (or anti-propeller) end. The front of the engine is the propeller end and the oil sump is on the bottom of the engine. Cylinders are numbered from front to rear with the oddnumbered cylinders on the right-hand side. The firing order for this four-cylinder engine is --2-4. Top View of Engine Effectivity: IO-90- Series Engine Introduction Page ix Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog How to Order Parts and Publications n Oversize and Undersize Parts List is included in the front section of this catalog as an aid to order parts. lthough the information contained in this parts catalog is up-to-date at time of publication, users are advised to procure current information through all Lycoming distributors or from the factory by subscription. Refer to the latest revision of Service Letter No. L4 for subscription information.. For correct, expedited part shipments without delay:. lways give the model and serial number of your engine.. lways give the part number, nomenclature, and quantity. The S and SI documents are available from Lycoming distributors, or the factory, or by subscription. Full Revisions of the Illustrated Parts Catalog are available from Lycoming distributors or the factory. Every effort has been made in preparing this manual to ensure its accuracy. However, any comments, suggestions, or corrections to this manual are welcome and must be directed I writing to: Technical Publications Coordinator Lycoming Engines 52 Oliver Street Williamsport, P 770 NOTICE: The owner of the manual must give notification to Lycoming Engines for a change of address. dditionally, Lycoming has a Customer Service Hot Line for information and assistance to owners, operators, and maintenance personnel that are servicing Lycoming engines. Call - U.S. and Canada toll free - +-800-258-279 International Customers - +-570-2-8 8:00.M. 5:00 P.M. EST (-5GMT) Monday Friday. 20 by Lycoming. "ll Rights Reserved." ll Lycoming publications are to be considered copyrighted and may not be reproduced without permission of the company. Introduction Page x July 20 Effectivity: IO-90- Series Engine Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog bbreviations and cronyms R ssy. T Cyl. Fill. Hd. Hex. I.D. in. IPC mm No. NPT O.D. P P/N s Required ssembly ir Transport ssociation C Cylinder F Fillister H Head Hexagon I Inside Diameter Inch Illustrated Parts Catalog M Millimeter N Number National Pipe Taper (thread) O Outside Diameter P Lycoming Proprietary Part Part Number Qty. RF S SI SSP Quantity R Reference S Service ulletin Service Instruction Special Service Publication Effectivity: IO-90- Series Engine bbreviations and cronyms Page xi Lycoming Engines is a division of vco Corporation July 20
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IO-90- Series Engine Illustrated Parts Catalog Oversize and Undersize Parts Listing PRT NO. DESCRIPTION P05.005 70 USHING X OVERSIZE (IN.) P0 P0.00.00 7 GUIDE X 79 INSERT X 979 DOWEL X 7255-S USHING X 780 USHING X 755-S USHING X 7557-S USHING X 7588 GUIDE X LW-288 SET X P50.050 UNDERSIZE (IN.) M0 M0.00.00 8M205 ERING X X LW-792 SEL X STD-05 DOWEL X T948 SET X 8209 ERING X X 8D2098 ERING X X NOTICE: When ordering oversize and undersize parts, be sure to specify the required oversize and undersize dimension along with the proper part number. For example, to order bearing Part Number (P/N) 8D2098 bearing in 0.00 in. undersize, order P/N 8D2098-M0. Undersize code letter is M while oversize code letter is P. These letters are then followed by the number designating the size in thousandths of an inch. Effectivity: IO-90- Series Engine Oversize and Undersize Parts Listing Page xiii Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure lternator ttaching Parts 24-20 Effectivity: IO-90- Series Engine Page 0 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure - lternator ttaching Parts Figure Item Code Part Number Description Units per ssembly 079474 RCKET, lternator 2 78 LOCKPLTE, 5/ bolt x.00 spacing LW--0.94 OLT, 5/-8 x 5/ long, hex. head 2 2 2 4 7580 LINK, lternator, adjusting 5 STD-5 WSHER, 5/ plain LW-H0.75 OLT, 5/-8 x /4 long, hex. head 7 STD-727 WSHER, Plain, /4 O.D. x /2 I.D. x /8 thick 8 LW-H0.75 OLT, 5/-8 x /4 long, hex. head 9 07F228 STRUT, lternator support 0 LW-H0.75 OLT, 5/-8 x /4 long, hex. head STD-90 WSHER, / O.D. x 25/4 I.D. x / thick 2 N-7 OLT, /8-24 x -/4 long, hex. head, drilled end STD-90 WSHER, / O.D. x 25/4 I.D. x / thick 4 STD-872 NUT, /8-24 slotted 5 STD-7 COTTER PIN, /2 diameter x /4 long N- OLT, /8-24 x -5/4 long, hex. head 7 754 SHIM, -/8 O.D. x /2 I.D. x.005 thick 5 5 5 8 STD-90 WSHER, / O.D. x 25/4 I.D. x / thick 9 STD-872 NUT, /8-24 slotted 20 STD-7 COTTER PIN, /2 diameter x /4 long Effectivity: IO-90- Series Engine 24-20 Page Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure lternator ttaching Parts 24-20 Effectivity: IO-90- Series Engine Page 2 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure - lternator ttaching Parts Figure Item Code Part Number Description Units per ssembly 0722097 RCKET, lternator 2 0722002 RCKET, lternator, Ford, right LW-H2. OLT, 5/-8 x 2-/8 long hex. head D 4 4 072225 RCKET, lternator, aft 5 STD-5 WSHER, 5/ plain 4 07F2998 LINK, lternator adjusting, Ford, right 7 754 SHIM, -/8 O.D. x /2 I.D. x 0.005 thick 8 STD-5 WSHER, 5/ plain 9 LW-H0.88 OLT, 5/-8 x 7/8 long, hex. head 0 STD-42 WSHER, 7/8 O.D. x 25/4 I.D. x /8 thick LW-8H.09 OLT, /8- x /0 long hex. head, drilled 2 N7-44 OLT, 7/-20 x 4-9/2 long, hex. head STD-2092 WSHER, 29/4 I.D. x 7/8 O.D. x /8 thick 4 N0-7 NUT, 7/-20 plain slotted 2 5 LW-450 SHIM, 7/8 O.D. x 2/50 I.D. x 0.005 thick STD-7 PIN, Cotter, /2 diameter x /4 long Effectivity: IO-90- Series Engine 24-20 Page Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 2 lternator ssembly and elt 24-20 Effectivity: IO-90- Series Engine Page 4 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure 2 - lternator ssembly nd elt Figure Item Code Part Number Description Units per ssembly 29549 LTERNTOR SSEMLY, 2V (LX-852LS) 2C955 LTERNTOR SSEMLY, 24V (LU852LS) 2957 LTERNTOR SSEMLY, 2V, 70 MP, Thermocoupled (Type K) (LX-852LS) 2C277 LTERNTOR SSEMLY, 28V-90 (ES40-LS) 2C278 LTERNTOR SSEMLY, 28V-70 (ES-408LS) 2 9484 PULLEY, lternator 299 PULLEY, lternator 22008 PULLEY, lternator 2F274 SPCER, lternator fan 2F28 SPCER, lternator fan 4 2G275 FN, lternator 2G29 FN, lternator 5 2R27 CK PLTE, lternator fan 2R270 CK PLTE, lternator fan 7977-7 ELT, lternator drive, /8 wide 7977-90 ELT, lternator, /8 wide, 9.000 long 7977-470 ELT, lternator drive /8 wide 7D2992 ELT, lternator drive mm 79774-482 ELT, Compressor drive /2 wide NOTICE: Refer to the latest revision of Lycoming Service Instruction No. 54 for complete listing of F approved starters and alternators. Effectivity: IO-90- Series Engine 24-20 Page 5 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure Propeller Governor Drive ssembly, dapter ssembly, Covers, and Related Parts 72-0 Effectivity: IO-90- Series Engine Page July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Propeller Governor Drive ssembly, dapter ssembly, Covers, and Related Parts Figure Item Code Part Number Description Units per ssembly 87 SHFTGER, Propeller governor drive 2 759 WSHER, ccessory drive gear STD-22 RING, / diameter x /2 thick 4 85 GSKET, ccessory drive adapter 5 78594 DPTER SSEMLY, Propeller governor driven 755 DPTER SSEMLY, Propeller governor driven STD-4 INSERT, 5/-8 x 5/8 long, heli-coil 4 4 7 C- STUD, 5/-8 x 2.00 long 4 4 8 STD-774 PIN, /8 diameter x /4 long 9 STD-5 WSHER, 5/ plain 4 4 0 STD-475 WSHER, 5/ lock, internal teeth 4 4 STD-40 NUT, 5/-8 plain 4 4 2 77875 GER, Propeller governor driven LW-402 SHFT, Propeller governor idler gear 4 77874 GER SSEMLY, Propeller governor idler 5 7249 WSHER, Thrust (0.0585-0.0595 thick) R R 7250 WSHER, Thrust (0.02-0.0 thick) R R 725 WSHER, Thrust (0.055-0.05 thick) R R 7252 WSHER, Thrust (0.09-0.070 thick) R R 0L248 WSHER, Thrust (0.055-0.05 thick) R R N5502H5 SET SCREW, No. 0-2 x 5/ long 7 70455 GSKET, 25/2 I.D. x -/8 O.D. x /2 thick 8 LW-89 PLUG, /4- hex. head 9 7205 GSKET, Governor 20 7278 COVER, Governor drive R as required (continued on next page) Effectivity: IO-90- Series Engine 72-0 Page 7 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure Propeller Governor Drive ssembly, dapter ssembly, Covers, and Related Parts (Cont.) Figure Item Code Part Number Description Units per ssembly 2 STD-5 WSHER, 5/ plain 4 4 4 4 22 STD-475 WSHER, 5/ lock, internal teeth 4 4 4 4 2 STD-40 NUT, 5/-8 plain 4 4 4 4 24 LW-H.22 OLT, 5/-8 x -7/2 long 4 4 25 955 GSKET, ccessory drive adapter 2 90 COVER, Governor drive adapter pad 27 STD-5 WSHER, 5/ plain 4 4 28 STD-475 WSHER, 5/ lock, internal teeth 4 4 29 STD-40 NUT, 5/-8 plain 4 4 72-0 Effectivity: IO-90- Series Engine Page 8 July 20 Lycoming Engines is a division of vco Corporation
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IO-90- Series Engine Illustrated Parts Catalog Figure 4 Crankcase ssembly - and 72-20 Effectivity: IO-90- Series Engine Page 0 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure 4 Crankcase ssembly - and Effectivity: IO-90- Series Engine 72-20 Page Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure 4 - Crankcase ssembly Code Part Number Description U209-S CRNKCSE SSEMLY Units per ssembly U28750-S CRNKCSE SSEMLY 2 02544 STUD, /2- x 9-27/2 long 2 2 2 2 50-5 STUD, /2- x -7/8 long 8 8 8 8 4 8- STUD, /8- x -5/8 long 5 8D-7 STUD, /8- x 2-/8 long, drilled LW-79 STUD, 5/-8 x 5/ long, drilled 7 C-2 STUD, 5/-8 x -/2 long 2 2 2 2 8 C- STUD, 5/-8 x -5/8 long 9 STD-557 DOWEL, /2 diameter x / long, hollow 2 2 2 2 0 STD-54 DOWEL, 5/ diameter x /2 long 2 2 2 2 STD-2 INSERT, /4-20 UNC x /8 long 2 2 2 2 2 7258 USHING, Governor drive idler shaft 02 PLUG, /8-27 NPT, llen head 5 5 4 STD-9 PLUG, /-27 NPT, llen head 5 C- STUD, 5/-8 x 2.00 long 4 4 C-9 STUD, 5/-8 x 2-/8 long 4 2E202 NOZZLE SSEMLY, Piston cooling 4 4 4 4 72-20 Effectivity: IO-90- Series Engine Page 2 July 20 Lycoming Engines is a division of vco Corporation
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IO-90- Series Engine Illustrated Parts Catalog Figure 5 Crankcase Related Parts 72-20 Effectivity: IO-90- Series Engine Page 4 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure 5 - Crankcase Related Parts Code Part Number Description Units per ssembly 028- LL, / diameter 2 * 084 SPRING, Oil pressure relief valve * 88 SPRING, Oil pressure relief valve * 7747 SPRING, Oil pressure relief valve * LW-7 SPRING, Oil pressure relief valve * LW-8085 SPRING, Oil pressure relief valve 0E979-.25 GSKET, -/4 I.D. x -/2 O.D. x /2 annular 4 77808 VLVE SSEMLY, Oil pressure relief valve 5 8E288 ERING, Crankshaft 4 82885 ERING, Crankshaft, front 2 7 ** LW-528 SEL, Crankshaft, Oil 8 72075 SEL, Oil, /2 section x 7/ I.D. 2 9 7209 RING, Oil seal, 2/4 I.D. x /0 diameter 2 0 *** LRT28 ODY SSEMLY, Hydraulic roller tappet 8 * Select spring to give a minimum of three threads exposed on adjusting screw to allow field adjustment. Reference latest revision of Lycoming Table of Limits SSP-77, Part I for spring identification. ** Refer to latest revision of Lycoming Service Instruction No. 24 for installation. *** Sold as exchange part only. Effectivity: IO-90- Series Engine 72-20 Page 5 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure Crankshaft and Counterweight ssembly and Related Parts 72-20 Effectivity: IO-90- Series Engine Page July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure - Crankshaft and Counterweight ssembly and Related Parts Code Part Number Description Units per ssembly C477 CRNKSHFT ND USHING SSEMLY C478 CRNKSHFT ND USHING SSEMLY 2 STD-05 DOWEL, Stepped, 5/ & /4 diameter 755-S USHING, Prop flange, long 4 4 4 7255-S USHING, Prop flange, short 2 2 5 79024-S USHING, Propeller flange, indexing 7557-S USHING, Propeller flange, indexing LW-4529 PLUG, 2-/ diameter expansion 7 LW-9227 COUNTERWEIGHT SSY 2 2 2 2 8 790- USHING, Dynamic counterweight 4 4 4 4 9 4W29 ROLLER, Dynamic counterweight 2 2 2 2 0 72797 ROLLER, Dynamic counterweight,. order 2 2 2 2 LW-4820 RING, Internal retaining 8 8 8 8 2 7907 WSHER, Counterweight 8 8 8 8 * S94 GER, Crankshaft 4 LW-89 LOCKPLTE, Crankshaft gear 5 STD-224 OLT, 5/-24 x.00 long LW-47 SUPPORT SSEMLY, Starter ring gear M98 SUPPORT SSEMLY, Starter ring gear M2994 SUPPORT SSEMLY, Starter ring gear 7 725 GER, Starter ring, 2/4 pitch * Refer to the latest revision of Service ulletin No. 475 for proper installation. Effectivity: IO-90- Series Engine 72-20 Page 7 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 7 Crankshaft Idler Gears, Tachometer Drive, and Camshaft 72-20 Effectivity: IO-90- Series Engine Page 8 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure 7 - Crankshaft Idler Gears, Tachometer Drive, and Camshaft Code Part Number Description Units per ssembly 2D2777 PLUNGER, Fuel pump, long 2 7499 GER SSEMLY, Crankshaft idler, plain 75072 GER SSEMLY, Crankshaft idler 4 72 SHFT SSEMLY, Tachometer 5 STD-22 RING, Internal retaining LW-79 SHFT, Crankshaft idler gear 2 2 2 2 7 LW-H0.88 OLT, 5/-8 x 7/8 long, hex. head, drilled 8 STD-28 NUT, 5/-8 NC- slotted shear 9 5M2452 CMSHFT SSEMLY 0 5M245 CMSHFT SSEMLY 78 SPCER, Tachometer shaft centering Effectivity: IO-90- Series Engine 72-20 Page 9 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 8 Crankcase ttaching Parts 72-20 Effectivity: IO-90- Series Engine Page 20 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure 8 - Crankcase ttaching Parts Figure Item Code Part Number Description Units per ssembly LW-25-.50 OLT, /4-20 x -/2 long, hex. head 8 8 8 5 or 8 2 LW-25-2. OLT, /4-20 x 2-/8 long hex. head 2 STD-8 WSHER, /4 plain 9 9 20 7 or 20 4 080 STRP, Lifting or 2 5 LW-25-.75 OLT, /4-20 x -/4 long, hex. head or 2 LW-25-. OLT, /4-20 x -/8 long, hex. head 4 4 7 STD-0 WSHER, /4 lock, internal teeth 2 2 8 STD-4 NUT, /4-20 plain 9 9 9 9 9 LW-25S.50 OLT, /4-20 x -/2 long, hex. head, drilled 0 R STD-8 WSHER, /4 plain 9 9 9 9 STD-2249 NUT, /4-20 slotted 2 STD- WSHER, /8 plain or 2 N90-L WSHER, /8 plain, thin or 4 STD-872 NUT, /8-24 slotted 5 N-4 OLT, /8-24 x -7/4 long, hex. head 2 2 STD- WSHER, /8 plain 4 4 7 STD-78 WSHER, /8 lock, internal teeth 2 2 2 2 8 STD-59 NUT, /8-24 plain 2 2 2 2 9 02245 STUD, /2-20 x 0-/2 long 4 4 4 4 R as required Effectivity: IO-90- Series Engine 72-20 Page 2 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 9 Connecting Rods, Pistons, and Ring ssemblies 72-0 Effectivity: IO-90- Series Engine Page 22 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure 9 - Connecting Rods, Pistons, and Ring ssemblies Code Part Number Description Units per ssembly 77450 CONNECTING ROD SSEMLY 4 2 * 750 OLT, Connecting rod 8 LW-28 NUT, Connecting rod bolt 8 4 8M2887 ERING, Connecting rod 8 5 4E29 PISTON, Compression ratio 8.90: 4 ** 4J22048 PIN, Piston 4 7 7298 PLUG, Piston pin 8 8 4G22050 RING, Piston compression 8 9 4H248 RING, Piston oil regulating, expander type 4 * Service use only. ** Refer to the latest revision of Lycoming Service Instruction No. 27. Effectivity: IO-90- Series Engine 72-0 Page 2 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 0 Cylinder ssembly 72-0 Effectivity: IO-90- Series Engine Page 24 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure 0 - Cylinder ssembly Figure Item Code Part Number Description Units per ssembly 208 CYLINDER ND HED SSEMLY, Nitrided 4 4 4 4 2 7222 bore SET, Intake valve 4 4 4 4 T948 SET, Valve, exhaust 4 4 4 4 4 LW-95 GUIDE, Valve, intake 4 4 4 4 5 LW-958 GUIDE, Valve, exhaust 4 4 4 4 79 INSERT, Spark plug, 8-.5 MM 8 8 8 8 7 C- STUD, 5/-8 x -5/8 long 8 8 8 8 8 25C-8 STUD, /4-20 x.00 long 9 MS2082-D ELOW, 45, /8 flared tube 4 4 4 4 0 70 USHING, Rocker shaft, inner 724 STILIZER, Cylinder head fins, 5 teeth 4 4 4 4 2 7244 STILIZER, Cylinder head fins, 2 teeth 4 4 4 4 02 PLUG, /8-27 NPT, llen head 4 4 4 4 4 STD-5 WSHER, 5/ plain 8 8 8 8 5 STD-475 WSHER, 5/ lock, internal teeth 8 8 8 8 STD-40 NUT, 5/-8 plain 8 8 8 8 7 * 758 GSKET, Exhaust flange 8 8 8 8 * 77 GSKET, Exhaust flange 8 8 05U225 THERMOCOUPLE, Installation, K type 2 9 N407- FITTING, Temp. measuring element 4 20 LW-8752 THERMOCOUPLE, K, cyl. head bayonet 4 * This part is shipped loose with the engine. Effectivity: IO-90- Series Engine 72-0 Page 25 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure Valve ssembly and Related Parts 72-0 Effectivity: IO-90- Series Engine Page 2 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure Valve ssembly and Related Parts Code Part Number Description Units per ssembly 7294 VLVE, Intake 4 4 4 4 2 7295 VLVE, Exhaust 4 4 4 4 LW-79 SPRING, Valve, outer 8 8 8 8 4 LW-797 SPRING, Valve, inner 8 8 8 8 5 LW-2 SET, Valve spring, lower intake 4 4 4 4 LW-22 SET, Valve spring, lower exhaust 4 4 4 4 7 LW-0077 SET, Valve spring, upper intake 4 4 4 4 8 LW-475 SET, Valve spring, upper exhaust 4 4 4 4 9 0009 KEY, Valve, intake 8 8 8 8 0 7C29 KEY, Valve, exhaust 8 8 8 8 7C98 CP, Valve stem, exhaust 4 4 4 4 2 02G282 NIPPLE, Nozzle pressure gauge 520 PLUNGER SSEMLY, Hydraulic tappet 8 8 8 8 4 529 SOCKET, Hydraulic tappet 8 8 8 8 5 5G242 SHROUD TUE SSEMLY, Push rod 8 8 8 8 5H220 SPRING, Shroud tube 7 0L2459 WSHER, /4 I.D. x -/8 O.D. x /2 8 8 8 8 8 50 SLEEVE, Shroud tube 8 8 8 8 9 LW-8 SEL, Shroud tube 8 8 8 8 20 0249 SEL, Shroud tube 8 8 8 8 (continued on next page) Effectivity: IO-90- Series Engine 72-0 Page 27 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure Valve ssembly and Related Parts (Cont.) Code Part Number Description Units per ssembly 2 5F9957-5 ROD SSEMLY, Push ( total of 8 required) RT R R R R 5F9957-52 ROD SSEMLY, Push ( total of 8 required) RT R R R R 5F9957-5 ROD SSEMLY, Push ( total of 8 required) RT R R R R 5F9957-54 ROD SSEMLY, Push ( total of 8 required) RT R R R R 5F9957-55 ROD SSEMLY, Push ( total of 8 required) RT R R R R 5F9957-5 ROD SSEMLY, Push ( total of 8 required) RT R R R R 5F22-7 ROD SSEMLY, Push ( total of 8 required) RT R R R R 5F22-8 ROD SSEMLY, Push ( total of 8 required) RT R R R R 5F22-9 ROD SSEMLY, Push ( total of 8 required) RT R R R R 5F22-20 ROD SSEMLY, Push ( total of 8 required) RT R R R R 5F22-2 ROD SSEMLY, Push ( total of 8 required) RT R R R R 5F22-22 ROD SSEMLY, Push ( total of 8 required) RT R R R R 22 * 7F288 ROCKER SSEMLY, Valve, intake 4 4 4 4 2 * 7F287 ROCKER SSEMLY, Valve, exhaust 4 4 4 4 24 7489 USHING, Valve rocker 8 8 8 8 25 7549 WSHER, Thrust, valve rocker 8 8 8 8 2 722 SHFT, Valve rocker 8 8 8 8 R s Required RT Roller tappet * Due to the size of the area where the part number is stamped, the last five digits (957) could be all that is shown of the part number. 72-0 Effectivity: IO-90- Series Engine Page 28 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog This page intentionally left blank Effectivity: IO-90- Series Engine 72-0 Page 29 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 2 Cylinder Related Parts 72-0 Effectivity: IO-90- Series Engine Page 0 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure 2 - Cylinder Related Parts Figure Item Code Part Number Description Units per ssembly 72 GSKET, Valve rocker shaft cover 8 8 8 8 2 7270 COVER, Valve rocker shaft 4 4 4 or 8 4 STD-0 WSHER, /4 lock, internal teeth 4 STD-4 NUT, /4-20 plain 5 79 GSKET, Rocker box cover 4 4 4 4 028 GSKET, Rocker box cover, silicone 4 7J249 COVER SSEMLY, Rocker box 4 4 4 4 7 STD-925 SCREW, /4-20 x 5/8 long, pan hd., selflocking 2 2 2 2 8 MS55- WSHER 2 9 74494 PLTE, Spark plug reach caution 4 4 4 4 0 748 RING, Oil seal, /2 diameter x 4-27/2 4 4 4 4 74887 long SPCER, /4 I.D. x 7/8 O.D. x /8 thick 2 2 2 2 2 74 NUT, /8-24 NF- 7 NUT, /2-20 NF- 4 STD-2090 NUT, /2-20 plain 2 2 2 2 Effectivity: IO-90- Series Engine 72-0 Page Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure Cylinder Head Drain Tubes and Intercylinder Cooling affles 72-0 Effectivity: IO-90- Series Engine Page 2 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure - Cylinder Head Drain Tubes and Intercylinder Cooling affles Code Part Number Description Units per ssembly STD-84 NIPPLE, Straight, /8 I.D. hose 4 2 STD-280 HOSE, /8 x -/ long 4 LW-5592-5-05 CLMP, Hose 8 4 72702 TUE SSEMLY, Cyl. head oil drain, cyl. No. 5 7270 TUE SSEMLY, Cyl. head oil drain, cyl. No. 2 74808 TUE SSEMLY, Cyl. head oil drain, cyl. No. 7 7027 TUE SSEMLY, Cyl. head oil drain, cyl. No. 4 8 * 758 FFLE SSEMLY, Intercylinder ** 757 FFLE SSEMLY, Intercylinder 9 7 RETINER, Intercylinder baffle 2 0 7M2284 HOOK, Intercylinder baffle retainer 2 7284 COVER, affle ignition cable hole 2 2 STD-92 SCREW, No. 0-2 x /2 long, round head 4 STD-70 LOCK NUT, No. 0-2 4 4 ** MS5489-20X GROMMET 5 54 PLUG, affle attaching 4 STD-25 WSHER, No. 0, internal lock 4 7 STD-8 SCREW, No. 0-2 x 7/ long 4 * Install on left side cylinders No. 2 and 4 ** Install on right side between cylinders No. and Effectivity: IO-90- Series Engine 72-0 Page Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 4 Intake Pipes ssembly 72-0 Effectivity: IO-90- Series Engine Page 4 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Code Part Number Figure 4 Intake Pipes ssembly Description Units per ssembly 7759 SEL, Intake pipe 4 4 4 4 2 7874 PIPE, Intake, cylinder No. 78742 PIPE, Intake, cylinder No. 2 7874 PIPE, Intake, cylinder No. 78744 PIPE, Intake, cylinder No. 4 740 FLNGE, Intake pipe, upper 4 4 4 4 4 797 GSKET, 2 bolt flange, -/4 I.D. 4 4 4 4 5 STD-8 WSHER, /4 plain 8 8 8 8 STD-0 WSHER, /4 lock, internal teeth 8 8 8 8 7 LW-25-.25 OLT, /4-20 x -/4 long, hex. head 8 8 8 8 8 75444 DPTER SSEMLY, Fuel drain valve Effectivity: IO-90- Series Engine 72-0 Page 5 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 5 Oil Level Gage 72-50 Effectivity: IO-90- Series Engine Page July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure 5 - Oil Level Gage Code Part Number Description Units per ssembly 757 TUE, Oil level gage 5C2075 TUE SSEMLY, Oil level gage 2 72059 GSKET, Oil level gage 7408 RING, Oil level gage plug 7405 O-RING, Oil level gage 4 LW-470 GGE SSEMLY, Oil level LW-47 GGE SSEMLY, Oil level Effectivity: IO-90- Series Engine 72-50 Page 7 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog See Location elow Figure Oil Sump ssembly and Oil Suction Screen 72-50 Effectivity: IO-90- Series Engine Page 8 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure Oil Sump ssembly and Oil Suction Screen Code Part Number Description Units per ssembly LW-5 GSKET, Oil sump 2 LW-84 SUMP SSEMLY, Oil 400 STUD, /4-20 x -/ long 4 C-4 STUD, 5/-8 x -/4 long 4 4 4 4 5 02 PLUG, /8 pipe STD-55 PLUG, /2-4 NPT, square head, drilled 2 2 2 2 7 STD-8 WSHER, /4 plain 2 2 2 2 8 STD-0 WSHER, /4 lock, internal teeth 20 20 20 20 9 LW-25-0.94 OLT, /4-20 x 5/ long, hex. head 2 2 2 2 0 LW-25-. OLT, /4-20 x -/8 long, hex. head 2 2 2 2 STD-4 NUT, /4-20 plain 2 2 2 2 2 STD-2229 PLUG, /2 NPT, llen head LW-752 PLUG, Sump 4 70484 SCREEN, Oil suction 5 LW-405 FITTING, Sump oil suction LW-594 FITTING, Sump oil strainer 7 LW-448 FITTING, Sump oil return 8 0E979-.00 GSKET, nnular,.00 I.D. 9 LW-2545 PLUG, 5/8 hex. head x.00-20 thread Effectivity: IO-90- Series Engine 72-50 Page 9 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 7 ccessory Housing ssembly 72-0 Effectivity: IO-90- Series Engine Page 40 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure 7 ccessory Housing ssembly Code Part Number Description Units per ssembly 788 GSKET, ccessory housing 2 225-0 CCESSORY HOUSING SSEMLY, Studding 225- HOUSING SSEMLY, ccessory, studding C-2 STUD, 5/-8 x -/2 long 8 8 8 8 4 25C-22 STUD, /4-20 x 2-/4 long 4 4 4 4 400 STUD, /4-20 x -/ long 4 5 CD-7 STUD, 5/-8 x 2-/8 long drilled 02 PLUG, /8 pipe 4 4 4 4 7 STD-784 PLUG, /8-8 NPT, llen head 8 79 SHIELD, ccessory breather oil 9 MS2082-4 ELOW, /8 NPT to /4 flared tube Effectivity: IO-90- Series Engine 72-0 Page 4 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 8 Oil Pump ssembly and ccessory Housing ttaching Parts 72-0 Effectivity: IO-90- Series Engine Page 42 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure 8 Oil Pump ssembly and ccessory Housing ttaching Parts Code Part Number Description Units per ssembly 785 ODY SSEMLY, Oil pump 2 74 SHFT, Oil pump drive 05K942-S IMPELLER KIT 4 LW-80 IMPELLER SSEMLY, Oil pump driven 5 LW-809 IMPELLER, Oil pump driven STD-5 WSHER, 5/ plain 7 STD-420 NUT, 5/-8 slotted 8 LW-420 SEL, Tachometer drive, oil 9 STD-8 WSHER, /4 plain 2 0 STD-0 WSHER, /4 lock, internal teeth 2 LW-25-0.94 OLT, /4-20 x 5/ long, hex. head 9 2 LW-25-. OLT, /4-20 x -/8 long, hex. head LW-25-.44 OLT, /4-20 x -7/ long, hex. head 2 Effectivity: IO-90- Series Engine 72-0 Page 4 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 9 Fuel Pump and ttaching Parts 72-0 Effectivity: IO-90- Series Engine Page 44 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure 9 - Fuel Pump and ttaching Parts Code Part Number Description Units per ssembly 009 GSKET, Fuel pump 2 229 FUEL PUMP, High Pressure STD- WSHER, /8 plain 2 4 STD-882 SCREW, /8- x -9/2 long, socket head, drilled 2 Effectivity: IO-90- Series Engine 72-0 Page 45 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 20 Propeller Governor Oil Line Tube ssembly and ttaching Parts 72-0 Effectivity: IO-90- Series Engine Page 4 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure 20 - Propeller Governor Oil Line Tube ssembly and ttaching Parts Code Part Number Description 757 TUE SSEMLY, Propeller governor oil line 7570 TUE SSEMLY, Propeller governor oil line 2 STD-90 HOSE, /8 I.D. x.00 long 755 CLIP, Propeller governor oil line support 4 STD-5 WSHER, 5/ plain 5 STD-475 WSHER, 5/ lock, internal teeth LW--0.94 OLT, 5/-8 x 5/ long, hex. head 7 LW-2-25-8 CLMP, /8 I.D. x /4 diameter screw 8 MS20822- ELOW, /4 NPT to /8 flared tube, 90º 9 74070 ELOW, /8 flared tube and 9/-8 Units per ssembly Effectivity: IO-90- Series Engine 72-0 Page 47 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 2 Vacuum Pump Drive and Cover 72-0 Effectivity: IO-90- Series Engine Page 48 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure 2 Vacuum Pump Drive and Cover Code Part Number Description Units per ssembly 8 GSKET, ccessory adapter 2 098 DPTER SSEMLY, Vacuum pump STD-774 PIN, /8 diameter x /4 long 4 0995 OIL SEL, 7/8 I.D. x -/2 O.D. x 5/ 5 72970 GER SSEMLY, Vacuum pump driven 7292 THRUST UTTON, Vacuum pump gear 7 759 WSHER, ccessory drive gear 8 8 GSKET, Vacuum pump 9 040 COVER, Vacuum pump 0 STD-8 WSHER, /4 plain 4 STD-0 WSHER, /4 lock, internal teeth 4 2 STD-4 NUT, /4-20 plain 4 Effectivity: IO-90- Series Engine 72-0 Page 49 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 22 Oil Filter ssembly, Oil Cooler ypass Valve, and Fittings 72-0 Effectivity: IO-90- Series Engine Page 50 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure 22 Oil Filter ssembly, Oil Cooler ypass Valve, and Fittings Code Part Number Description Units per ssembly * 0282 GSKET, Oil filter adapter 2 2 2 2 2 0244 GSKET, Oil filter base cover 2M27 COVER, Oil filter base 4 752 RCKET, Support clamp 5 77852 OIL FILTER SE SSEMLY LW-25 OIL FILTER, Short, CH480-7 STD-8 WSHER, /4 plain 4 4 4 4 8 STD-0 WSHER, /4 lock, internal teeth or 4 9 LW-25-0.94 OLT, /4-20 x 5/ long, hex. head 0 STD-4 NUT, /4-20 plain LW-25-.00 OLT, /4-20 x.00 long, hex. head or 2 STD-0 WSHER, /4 lock, internal teeth 5E2244 VLVE SSEMLY, Temp. control, oil cooler bypass 4 25C-0 STUD, /4-20 x -/4 long 5 0E979-0. GSKET, nnular, 5/8 I.D. 247 PLUG, Oil cooler bypass 7 MS2082-8 ELOW, /8 NPT, /2 flared tube 8 740 FITTING, reather 9 N8-8 NIPPLE, /2 flared tube 20 N844-0D ELOW, Pipe 2 272 CP, Tachometer drive * One of the oil filter adapter gaskets P/N 0282 is shipped loose with the engine. Effectivity: IO-90- Series Engine 72-0 Page 5 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 2 Fuel Injector, Fuel Manifold ssembly, and rackets 7-0 Effectivity: IO-90- Series Engine Page 52 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure 2 Fuel Injector, Fuel Manifold ssembly, and rackets Code Part Number Description Units per ssembly 224 GSKET, Carburetor 2 LW-848 FUEL INJECTOR, 2524550-8 J242 FUEL INJECTOR, RS-5D, V 2524054- J2875 FUEL INJECTOR, RS-5D, V258000 STD-5 WSHER, 5/ plain 4 4 4 4 4 STD-40 NUT, 5/-8 plain 4 4 4 4 5 STD-475 WSHER, 5/ lock, internal teeth 4 4 4 4 C2450 NOZZLE, Injection, low, V252484-2 4 4 4 4 7 LW-847 MNIFOLD SSEMLY, Fuel 75279 MNIFOLD SSEMLY, Fuel 2702 MNIFOLD SSEMLY 2724 MNIFOLD SSEMLY, Fuel 28207 MNIFOLD SSEMLY, Fuel (4 PSI) 8 MS20822-4 ELOW, /8 NPT to /4 tube, 90 9 N79-2 ELOW, Union 45, /8 tube 4 4 4 4 0 02G282 NIPPLE, Nozzle pressure gauge STD-48 NIPPLE, Union, /8 NPT 4 N8-4 NIPPLE, /8 NPT to /4 tube 02 PLUG, /8 pipe 2 2 2 or 2 79 SPCER, Fuel manifold bracket 2 75009 RCKET, Fuel manifold 4 0722995 RCKET, Fuel manifold 5 072299 RCKET, Fuel manifold STD-25 WSHER, No. 0, internal lock 4 4 4 4 7 STD-82 SCREW, No. 0-24 x /2 long, fill. head 4 4 4 4 8 STD-0 WSHER, /4 lock, internal teeth 9 LW-25-0.50 OLT, /4-20 x /2 long, hex. head * 77504 GSKET, Fuel injector * Install gasket P/N 77504 between the fuel injector and the airframe air box Effectivity: IO-90- Series Engine 7-0 Page 5 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 24 Fuel Lines, Fuel Hoses, and ttaching Parts 7-0 Effectivity: IO-90- Series Engine Page 54 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure 24 Fuel Lines, Fuel Hoses, and ttaching Parts Effectivity: IO-90- Series Engine 7-0 Page 55 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure 24 Fuel Lines, Fuel Hoses, and ttaching Parts Code Part Number Description (continued on next page) Units per ssembly LW-2098-0-70 TUE SSEMLY, Fuel 2 LW-2098-0-40 TUE SSEMLY, Fuel 2 2 2 2 2 LW-2098-0-90 TUE SSEMLY, Fuel injector line 2 LW-2098-0-20 TUE SSEMLY, Fuel injector line 2 2 2 2 LW-2-0-75 CLMP 4 4 4 4 or 8 4 LW-2-0- CLMP, /8 diameter for No.0 screw or 8 5 STD-80 SCREW, No. 0-2 x 5/8 long, fill. head or 8 STD-70 LOCK NUT, No. 0-2 or 8 7 LW-52 NIPPLE, /8 flared tube, 9/-8 8 02M28209 HOSE SSEMLY, Teflon /4 hose, straight 9 N85-4 UNION, /4 flared tube 0 02M2820 HOSE SSEMLY, Teflon /4 hose, 90 7285 RCKET, Support clamp, 90 2 STD-80 SCREW, No. 0-2 x 5/8 long, fill. head STD-70 LOCK NUT, No. 0-2 4 LW-2-0- CLMP, 5/8 I.D. x No. 0 screw 5 74278 RCKET SSEMLY, Fuel line support STD-70 LOCK NUT, No. 0-2 7 STD-92 SCREW, No. 0-2 x /2 long, round head 2 8 STD-425 WSHER, No. 0 plain 9 STD-80 SCREW, No. 0-2 x 5/8 long, fill. head 20 LW-2-25-50 CLMP 2 LW-52 NIPPLE, /8 flared tube, 9/-8 2 7-0 Effectivity: IO-90- Series Engine Page 5 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure 24 Fuel Lines, Fuel Hoses, and ttaching Parts (Cont.) Code Part Number Description Units per ssembly 22 02M28208 HOSE SSEMLY, Teflon /8 hose, 45 2 LW-2799-S254 elbow HOSE SSEMLY, /8 hose, straight 24 LW-2798-4S72 HOSE SSEMLY, /4 hose, straight 25 LW-2799-S254 HOSE SSEMLY, /8 hose, straight 2 LW-2-0-75 CLMP 27 LW-2-25-75 CLMP, /4 I.D. x /4 dia. screw 28 752 RCKET, Support clamp 29 STD-92 SCREW, No. 0-2 x /2 long, round head 0 STD-425 WSHER, No. 0 plain STD-70 LOCK NUT, No. 0-2 2 755 TEE, /8 tube with 9/ thread 7 RCKET, Extension, fuel injector 2 2 2 2 4 LW-2-0- CLMP, 5/8 I.D. x No. 0 screw 2 5 STD-80 SCREW, No. 0-2 x 5/8 long, fill. head 2 STD-425 WSHER, No. 0 plain 2 7 STD-70 LOCK NUT, No. 0-2 2 8 N844-4D ELOW, Pipe to hose Effectivity: IO-90- Series Engine 7-0 Page 57 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 25 Magnetos, Magneto Drives, Harnesses, and Spark Plugs 74-20 Effectivity: IO-90- Series Engine Page 58 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Figure 25 Magnetos, Magneto Drives, Harnesses, and Spark Plugs Code Part Number Description Units per ssembly 8C922 GER, Magneto 2 2 2 2 2 MS9245-44 COTTER PIN, /2 diameter x 5/8 long 2 2 2 2 LW-28 GSKET, Magneto 2 2 2 2 4 GP-0SNN MGNETO, Plain 470 5 GR25SNN MGNETO, Retard 447 V 7P204 HRNESS SSEMLY, Slick, Left, V M409 7 V 7P2042 HRNESS SSEMLY, Slick, Right, V M4020 8 M295 CLMP, Magneto 4 4 4 4 9 STD-475 WSHER, 5/ lock, internal teeth 4 4 4 4 0 STD-40 NUT, 5/-8 plain 4 4 4 4 LW-2-25-50 CLMP 2 2 STD-4 NUT,/4-20 plain 2 7285 RCKET, Support clamp, 90 5 4 7 RCKET, Extension, fuel injector line 5 7740 RCKET, 90 2 752 RCKET, Support clamp 4 7 STD-475 WSHER, 5/ lock, internal teeth 4 8 V * 82-G7 SPRK PLUG, Champion, RE7E 8 8 8 8 ** 0P972-2-7 G, Harness attaching V Vendor Prime Manufacturer part * Refer to the latest revision of Lycoming Service Instruction No. 042 for a complete listing of all approved spark plugs. ** See Page 58 for a breakdown of individual parts contained in the magneto and harness attaching parts bag. These parts to be attached by customer per engine line drawing included in each bag. Effectivity: IO-90- Series Engine 74-20 Page 59 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Figure 2 Starter Motor and ttaching Parts 80-0 Effectivity: IO-90- Series Engine Page 0 July 20 Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Figure Item Code Part Number Figure 2 - Starter Motor and ttaching Parts Description 2592 STRTER, 2/24, 2/4P (49NL Sky-Tec) Units per ssembly 2554 STRTER, Sky-Tec (49NL/EC) 2205 STRTER, Sky-Tec (49-24LS) 2 STD-475 WSHER, 5/ lock, internal teeth 4 4 4 LW--0.94 OLT, 5/-8 x 5/ long, hex.head 4 STD-40 NUT, 5/-8 plain NOTICE: Refer to the latest revision of Service Instruction No. 54 for complete listing of Fapproved starters, alternators, generators, regulators and relays. Effectivity: IO-90- Series Engine 80-0 Page Lycoming Engines is a division of vco Corporation July 20
Service Kit Section Seal and Gasket Set IO-90- Series Engine Illustrated Parts Catalog Part No. Part Name Qty. 05K28420 KIT - SEL ND GSKET SET N90-8 GSKET, Metal tube connect seal LW-2272 LOCKPLTE, Shroud tube 4 LW-28 GSKET, Magneto 2 0282 GSKET, Oil filter adapter LW-5 GSKET, Oil sump LW-792 SEL, Crankshaft, oil LW-4995 SPRING, Shroud tube 4 LW-89 LOCKPLTE, Crankshaft gear STD-475 WSHER, 5/ lock, internal teeth 24 STD-7 COTTER PIN, /2 diameter x /4 long 2 0249 SEL, Shroud tube 8 029-Y GSKET, Rocker box cover 4 0E979-0. GSKET, nnular, 5/8 I.D. 2 0E979-.00 GSKET, nnular,.00 I.D. 0E979-.25 GSKET, -/4 I.D. x -/2 O.D. x /2 annular 009 GSKET, Fuel pump 224 GSKET, Carburetor 2 700 SEL, Shroud tube 8 70455 GSKET, 25/2 I.D. x -/8 O.D. x /2 thick 748 RING, Oil seal, 4-27/2 I.D. x /2 diameter section 4 797 GSKET, 2 bolt flange, -/4 I.D. 4 7205 GSKET, Governor 2 72059 GSKET, Oil level gage 72075 SEL, Oil, /2 section x 7/ I.D. 7209 RING, Oil seal, 0. I.D. x 0.0 diameter 2 72220 GSKET, Oil level gage 788 GSKET, ccessory housing 7405 RING, Oil level gage seal 77504 GSKET, Fuel injector 77 GSKET, Exhaust flange 4 7759 RING, Seal, intake pipe 4 MS25-25 RING, Internal retaining, -/4 diameter 2 MS9245-44 PIN, /2 diameter x 5/8 long, cotter style D 2 Service Kits Page 2 July 20 Effectivity: IO-90- Series Engine Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Cylinder, Piston and Ring ssembly Part No. Part Name Qty. 05K2745 KIT - CYLINDER, PISTON ND RING SSEMLY G222-0 CYLINDER HED ND VLVE SSEMLY 02 PLUG, /8 pipe 2 748 RING, Oil seal, /2 diameter x 4-27/2 I.D. 4D292 PISTON, Compression ratio 8.50: 7424 RING, Piston, compression, 5-/8 bore 2 4H2950 RING, Piston, oil, 5-/8 bore LW-4078 PIN, Piston 7298 PLUG, Piston pin 2 029 GSKET, Rocker box cover LW-2272 LOCKPLTE, Shroud tube 795 Container LW-8 SEL, Shroud tube 2 700 SEL, Shroud tube 2 SSP-299 TG, Use of piston pin plugs 77 GSKET, Exhaust flange 797 GSKET, 2 bolt flange, -/ I.D. 0249 SEL, Shroud tube 2 Effectivity: IO-90- Series Engine Service Kits Page Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog This page intentionally left blank Service Kits Page 4 July 20 Effectivity: IO-90- Series Engine Lycoming Engines is a division of vco Corporation
IO-90- Series Engine Illustrated Parts Catalog Part No. Part Name Page No. N0-7 NUT N407- FITTING 27 N5502H5 SET SCREW 0 N- OLT N-7 OLT N-4 OLT 2 N7-44 OLT N79-2 ELOW 55 N85-4 UNION 58 N8-4 NIPPLE 55 N8-8 NIPPLE 5 N844-0D ELOW 5 N844-4D ELOW 59 N90-L WSHER 2 LRT28 ODY SSEMLY 7 LW-25-0.50 OLT 55 LW-25-0.94 OLT 4 LW-25-0.94 OLT 45 LW-25-0.94 OLT 5 LW-25-.00 OLT 5 LW-25-. OLT 2 LW-25-. OLT 4 LW-25-. OLT 45 LW-25-.25 OLT 7 LW-25-.44 OLT 45 LW-25-.50 OLT 2 LW-25-.75 OLT 2 LW-25-2. OLT 2 LW-25S.50 OLT 2 LW--0.94 OLT LW--0.94 OLT 49 LW--0.94 OLT LW-H0.75 OLT LW-H0.75 OLT LW-H0.75 OLT LW-H0.88 OLT LW-H0.88 OLT 2 LW-H.22 OLT 0 LW-H2. OLT LW-8H.09 OLT LW-0077 SET 29 LW-7 SPRING 7 LW-79 SPRING 29 LW-797 SPRING 29 LW-848 FUEL INJECTOR 55 LW-95 GUIDE 27 LW-958 GUIDE 27 LW-2098-0-40 TUE SSEMLY 58 LW-2098-0-70 TUE SSEMLY 58 Numerical Index Part No. Part Name Page No. LW-2098-0-90 TUE SSEMLY 58 LW-2098-0-20 TUE SSEMLY 58 LW-28 NUT 25 LW-2545 PLUG 4 LW-28 GSKET LW-2798-4S72 HOSE SSEMLY 59 LW-2799-S254 HOSE SSEMLY 59 LW-2799-S254 HOSE SSEMLY 59 LW-25 OIL FILTER 5 LW-2 SET 29 LW-22 SET 29 LW-5 GSKET 4 LW-752 PLUG 4 LW-79 STUD 4 LW-79 SHFT 2 LW-84 SUMP SSEMLY 4 LW-89 PLUG 0 LW-402 SHFT 9 LW-405 FITTING 4 LW-448 FITTING 4 LW-420 SEL 45 LW-4529 PLUG 9 LW-450 SHIM LW-470 GGE SSEMLY 9 LW-47 GGE SSEMLY 9 LW-4820 RING 9 LW-594 FITTING 4 LW-5592-5-05 CLMP 5 LW-528 SEL 7 LW-2-0- CLMP 58 LW-2-0- CLMP 58 LW-2-0- CLMP 59 LW-2-0-75 CLMP 58 LW-2-0-75 CLMP 59 LW-2-25-8 CLMP 49 LW-2-25-50 CLMP 58 LW-2-25-50 CLMP LW-2-25-75 CLMP 59 LW-47 SUPPORT SSEMLY 9 LW-475 SET 29 LW-52 NIPPLE 58 LW-52 NIPPLE 58 LW-8085 SPRING 7 LW-809 IMPELLER 45 LW-80 IMPELLER SSEMLY 45 LW-847 MNIFOLD SSY. 55 LW-89 LOCKPLTE 9 LW-8 SEL 29 LW-8752 THERMOCOUPLE 27 Effectivity: IO-90- Series Engine Numerical Index Page 5 Lycoming Engines is a division of vco Corporation July 20
IO-90- Series Engine Illustrated Parts Catalog Part No. Part Name Page No. LW-9227 COUNTER. SSY. 9 MS20822-4 ELOW 55 MS20822- ELOW 49 MS2082-4 ELOW 4 MS2082-D ELOW 27 MS2082-8 ELOW 5 MS55- WSHER MS5489-20X GROMMET 5 MS9245-44 COTTER PIN STD-8 WSHER 2 STD-8 WSHER 2 STD-8 WSHER 7 STD-8 WSHER 4 STD-8 WSHER 45 STD-8 WSHER 5 STD-8 WSHER 5 STD- WSHER 2 STD- WSHER 2 STD- WSHER 47 STD-5 WSHER STD-5 WSHER STD-5 WSHER STD-5 WSHER 9 STD-5 WSHER 0 STD-5 WSHER 0 STD-5 WSHER 27 STD-5 WSHER 45 STD-5 WSHER 49 STD-5 WSHER 55 STD-82 SCREW 55 STD-48 NIPPLE 55 STD-0 WSHER 2 STD-0 WSHER STD-0 WSHER 7 STD-0 WSHER 4 STD-0 WSHER 45 STD-0 WSHER 5 STD-0 WSHER 5 STD-0 WSHER 5 STD-0 WSHER 55 STD-25 WSHER 5 STD-25 WSHER 55 STD-425 WSHER 58 STD-425 WSHER 59 STD-425 WSHER 59 STD-475 WSHER 9 STD-475 WSHER 0 STD-475 WSHER 0 STD-475 WSHER 27 Numerical Index (Cont.) Part No. Part Name Page No. STD-475 WSHER 49 STD-475 WSHER 55 STD-475 WSHER STD-475 WSHER STD-475 WSHER STD-54 DOWEL 4 STD-55 PLUG 4 STD-557 DOWEL 4 STD-59 NUT 2 STD-70 LOCK NUT 5 STD-70 LOCK NUT 58 STD-70 LOCK NUT 58 STD-70 LOCK NUT 58 STD-70 LOCK NUT 59 STD-70 LOCK NUT 59 STD-78 WSHER 2 STD-84 NIPPLE 5 STD-90 WSHER STD-90 WSHER STD-90 WSHER STD-92 SCREW 5 STD-92 SCREW 58 STD-92 SCREW 59 STD-7 COTTER PIN STD-7 COTTER PIN STD-7 PIN STD-784 PLUG 4 STD-80 SCREW 58 STD-80 SCREW 58 STD-80 SCREW 58 STD-80 SCREW 59 STD-872 NUT STD-872 NUT STD-872 NUT 2 STD-05 DOWEL 9 STD-4 INSERT 9 STD-22 RING 9 STD-9 PLUG 4 STD-42 WSHER STD-40 NUT 9 STD-40 NUT 0 STD-40 NUT 0 STD-40 NUT 27 STD-40 NUT 55 STD-40 NUT STD-40 NUT STD-4 NUT 2 STD-4 NUT STD-4 NUT 4 Numerical Index Page July 20 Effectivity: IO-90- Series Engine Lycoming Engines is a division of vco Corporation