Reviving old thread....
My engine came with an adapter inserted into the oil temp probe location. The adapter was safety wired and had a plug installed in it.
Question: Can I remove the adapter and just insert the probe into the hole (it fits and sees to have the right threads) or do i need to leave the adapter in place and thread the probe into the adapter (not sure if threads are same have not tried it).
This is a Garmin system.
Based on the Lycoming manual the adapter looks like part number 71600 "ADAPTER, Oil Cooler Extension"