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Service Instructions

From time to time, Lycoming issues Service Instructions. Service Instructions cover a variety of subjects, such as repair processes, modification procedures, inspection procedures and overhaul methods.

Service Instructions are available from Lycoming Distributors. Complete sets of Service Bulletins, Instructions and Letters are available for purchase in both hard copy and electronic form either directly from Lycoming or through a Lycoming Distributor.

SI-1518
Reprint of Precision Service Information Letter No. SIL RS-84

SI-1517
Timing change to TIO-540-AK1A Series Engines

SI-1514
Introduction of Roller Tappets

SI-1513
Reprint of Lamar Service Information Letter No. LSI-009

SI-1512
Main and Connecting Rod Bearing Upgrade

SI-1510A
Adapter Kit for Magneto Isolation Drive

SI-1509
Nuts, P/N STD-1409, Replacement of All with P/N STD-2249 Nuts

SI-1508B
Attachment, Magneto

SI-1506
Engines, 4-Cylinder, Replacement of Impulse Coupling Magnetos

SI-1505
Cold Weather Starting

SI-1504
Cylinder Assembly Inspection/Replacement on O-235 Engines

SI-1503
Accessory Drive Gear and Shaft Dowel Replacement

SI-1502A
Flow Divider, Inverted, Installation of

SI-1500
Change, Counterweight Roller for Robinson Helicopter

SI-1492C
Inspection, Piston Pin Plug Wear

SI-1489B
Fuel Manifold Spring Change

SI-1484A
Installation Torque for Fuel Metering Device, Carburetor, Fuel Injector Servo or "AN" Fuel Pump Hold Down Nuts

SI-1485A
Exhaust Valve and Guide Identification Procedure

SI-1481B
Engine Preservation, Factory

SI-1462A
Propeller Oil Control Leak Test Procedure (With Propeller Installed on Engine)

SI-1458D
Connecting Rod Bolts

SI-1453A
Converter Plate Gasket, Oil Filter, Replacement of

SI-1443F
Magnetos, Slick, Approved on Textron Lycoming Engines

SI-1438A
Governor Pad Plate, Propeller, P/N LW-12347

SI-1437
Engine Timing Marks

SI-1435
Conversion Constant Speed to Fixed Pitch Prop and Vice Versa/Prop Gov Oil Line Nut and Elbow

SI-1427B
Engine Break-In and Oil Consumption Test Limits

SI-1425A
Maintenance Procedures to Reduce Possibility of Valve Sticking

SI-1343B
Set Screw for Propeller Governor Idler Shaft

SI-1341
Idler Shaft Lubrication, Oil Pump

SI-1340A
Pin Identification, Piston

SI-1324B
Crankshaft Oil Seals

SI-1308E
Pressurized Magneto Pressure Test

SI-1308E-1
Supplement to Pressurized Magneto Pressure Test

SI-1304J
Engine Nameplate Replacement

SI-1285C
Magnetic Particle Inspection

SI-1241C
Engine Start, Pre-Oiling Prior to Initial

SI-1164B
Oil Pump Application

SI-1154L
Alternators, FAA Approved

SI-1148C
Use of Carburetor Heat Control

SI-1125C
Alternate Crankcase Parting Surface Sealants

SI-1105B
Alternator/Generator Mounting Brackets, Periodic Inspection

SI-1098G
Bushing Location, Propeller Flange

SI-1094D
Fuel Mixture Leaning Procedures

SI-1080C
Maintenance Items For Special Attention

SI-1070P
Specified Fuels

SI-1060J
Push Rod Identification

SI-1042Y
Approved Spark Plugs

SI-1037M
Cylinders, Approved for Use in Lycoming Aircraft Engines

SI-1014M
Lubricating Oil Recommendations

SI-1009AS
Overhaul, Recommended Time Between (TBO) - (Reactivated - Supersedes S.L. L201C)

 

Publications Order Forms

Publications are sold either through Distributors or directly from the factory.

Domestic Publications (PDF)

Export Publications (PDF)

Additional Support Resources

Key Reprints

Engine Troubleshooting Guide

Maintenance Publications

Tips & Advice

Pricing & Availability

Lycoming only sells product, (engines and spare parts), through our network of Authorized Distributors.

Find a Distributor Near You

Pricing Reference Documents

Aftermarket Engine Price List (PDF)

Aftermarket Parts Price List (PDF)

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