1972 Chrysler 20 hp outboard The prop is off

It was by accident that I noticed the little hole where I took the shift rod from actually would help me. Sprayed some WD40 down in that area and noticed some of the fluid came out the drain plug hole. Put the plug back in and sprayed in bigger amount and let it sit then emptied through drain plug. Nasty crud came out the hole but at least the prop started to move. Thank you again for watching.