Service Letter No. 264 A

Supersedes Service Letter No. L264

To All Owners and Operators of Lycoming Engine Models with Champion Magnetos

REASON FOR REVISION

Deleted Table 1 and Figure 1 in the attached Service Letter

If any of the following occur on a Lycoming engine after installation of Champion Slick 4300/6300 Series magnetos, complete the instructions per the attached Champion Slick Magneto Service Letter 4300/6300-74-20-001, dated February 18, 2015:

  • Hard starts 
  • Rough engine operation 
  • RPM / differential drops exceeding Lycoming Engine’s pre-flight magneto drop-off check
Engine Start Problems Due to Drift in Magneto-to-Engine Timing Reprint of Champion Slick Magneto Service Letter 4300/6300-74-20-001, dated February 18, 2015.
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https://www.lycoming.com/sites/default/files/SL264A%20Drift%20in%20Magneto-Engine%20timing%20%281%29.pdf