oil leak f250

[native son]

First time user here, glad I found this forum to get the much needed answeres and fixes for a not so mechical guy. Have a small oil leak (motor oil) finding its way down to the lower unit, weeping out the hole above the lower oil fill plug. after running boat, the next day I notice the oil, I have checked engine oil and its abit down from full. I keep getting different problems from all the experts at the marina....I need some help, anything would br appreciated. thanks

[boats.net]

The oil pan and oil pump is in that mid section, and could be leaking. Would have to pull engine and check oil pump seals and oil pan gaskets.

[rodbolt17]

and the infamous shaft seal to oil pump leak.
simple fix but it takes several hours.