1993 Johnson Evinrude "ET" 9.9 thru 30 Service Manual, P/N 508282, Page 54Get this manual
Heli-Coillnserts and Installers
Use these Heli-Coil inserts on all models to repair damaged threadsThe installation kit consists of drill, tap, and insertion toolsThe 14 mm spark plug inserts are specially made for use in aluminum cylinder headsDo not use substitutes
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