Supersedes Service Instruction No. 1192
September 29, 2010
TIO and TIGO541E Series Engines
TIME OF COMPLIANCE
Anytime valve springs are removed or installed
The valve spring compressor, No. ST25 used for all models of Lycoming engines cannot be used on the TIO541E series or the TIGO541E series engines because of the difference in the space between the valve rocker shaft and the valve. Consequently, a new valve spring compressor, No. ST266 has been designed especially for use on TIO and TIGO541E series engines and is available through all Lycoming distributors
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