Re: 93 evenrude 15 hp . Changing foot oil
Im not really sure what you are trying to ask? The gearcase will not accept oil?
Remove the drain and vent screws. Let it drain paying attention to colour and looking for chunks of metal. If milky white let us know.
Then put new crush washers on the screws. Dont reuse the old ones.
Fill from the bottom, until oil exits the top vent screw. Put in vent screw, remove oil pump from bottom drain hole, then quickly replace drain screw. Clean up mess and you're all done!