Well, got all the case screws out without breaking any, thank goodness. I was dreading that possibility. Now, I'm finding that getting the cover off is going to be a real challenge. I know it budged because a tiny bit of oil seeped out the the bottom. I've tapped it with a dead blow hammer (cloth covering the case of course). Any idea if it has alignment pins guiding the cover onto the engine? Tomorrow, I'll have at it again.The hot oil is more dangerous than my, dare I say, wash it in gasoline and pour the content on the weeds you've been thinking of removing.