Stator mount oil leak

Leaking out of the threaded hole means they drilled clean through into the crank case, must of screwed up that hole or is all 4 leaking?. I would try a gas and oil proof sealant on the threads there. Or you could get the proper sized threaded screw that is longer than what you need, cut off the head, then use loctite stud and bearing sealant on it. You will have one stud and 3 screws. You will then use a nut on the stud.
If you go the stud route mark the stud so you do not screw it in too far. Let the thread stuff set before use, the use of loctite thread setting accelerate will help.
But for quick repair I'd go with the screws and oil and gas proof thread dope rector seal #5 is a soft setting thread sealant but it isn't cheap, check with auto zone or one of the auto parts stores sometimes they sell little packets of thread sealants etc. at the front desk.
To clean out the threaded hole use carb or brake clean and spray the Poo out of the hole or holes.