[TruthWillWin]

No, the only way to put them in was from the outside.

Last boat had a brass plug, only way it goes on/off was from outside.

Two previous boats had the plug like you show on 311, only way they go on is from outside.

Would not make sense to design it to put on from inside. That would reqiure removing the motor cover and would be diddicult to reach in and install.

[VRWCarea51]

#321 perhaps on the bigger boats with I/O
I’ve only owned smaller type fishing boats 20 ft and smaller with outbaords.

All had access to the inside lower transoms where drain hole is