Had a severe oil leak from the Briggs & Stratton v twin on our riding mower. Found out it was the base gasket. Pulled the enfine, flipped it upside down, yanked the base off. Yep, blown out by the starter. Common problem when they get some hours on them. Six hours start to finish and then mowed the lawn. Also found the drain valve was loose and leaking too. Also had a huge mouse nest in it from the winter.
Oh... well... now isn't that just lovely news. We have a B&S on our JD D140... which I had to jump with the battery from the wagon yesterday.