DATE: September 23, 2004 MODELS AFFECTED Lycoming O-360-F1A6, IO-360-L2A, IO-540-AB1A5 and TIO-540-AK1A model engines employing PM2401 starters. (See Table below.) TIME OF COMPLIANCE Same as required for Lamar Service Information Letter No. LSI-009. This reprint is current at the time Lycoming Service Instruction No. 1513 is issued. However, when complying with this Service Instruction, insure...

Supersedes Service Bulletin No. 569 Aprl 11, 2006 MODELS AFFECTED Any Lycoming engine model specified below manufactures, rebuilt, overhauled, or repaired after March 1, 1997: Lycoming counterweighted (L)IO-360, and AEIO-360 engines described in section 1. Lycoming IO-390 and AEIO-590 engines described in Section 2. Lycoming O-540, IO-540, AEIO-540 and (L)TIO-540 engines described in Section 3...

June 28, 2016 MODELS AFFECTED Lycoming O, IO, AEIO-360 or O, IO, AEIO-320 series engines presently equipped with impulse coupling magnetos. TIME OF COMPLIANCE At owner’s discretion REASON FOR REVISION Added engine models to “MODELS AFFECTED”; clarified details in the text of this Service Instruction. This Service Instruction contains instructions to replace impulse coupling magnetos on affected...

This article is the first of three that explains in more detail Lycoming Engines's position on automotive fuels. The bottom line is that it's possible to make automotive gasoline "fitfor-purpose" for aviation. However, in doing so, you deviate from "pump gas" and end up creating a low octane unleaded aviation fuel from automotive gasoline blend stock - "mogas." Why do we need to have fuels "fit...

February 25, 2011 MODELS AFFECTED All Lycoming engines incorporating parallel valves except O­235 Series, O­290 Series, O­320­H Series and TO­360­E Series. TIME OF COMPLIANCE Anytime valve rocker assemblies are removed. This Service Instruction identifies Rocker Arm Assembly P/N 17F19357 to be installed on the parallel intake and exhaust valves on all cylinders. Rocker Arm Assembly P/N 17F19357...