Service Letter No. 192 B

Supersedes Service Letter No. L192A

January 19, 1988

Models Affected

To all Owners and Operators of Lycoming Aircraft Engines.

In many cases spark plug fouling resulting from the tetraethyl lead (TEL) in aviation fuels can be reduced or eliminated by proper operating techniques. 

Spark Plug Fouling
CTA Heading: 
Get It Exchanged
CTA Description: 
Use our Engine Exchange Program to order a new, rebuilt, or overhauled engine to experience more airtime and less downtime.
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https://www.lycoming.com/sites/default/files/Spark%20Plug%20Fouling.pdf