I have a 2007 mercury 115 hp 4 stroke that is leaking oil. Purchased boat in 09' used from dealer and operated all summer w/o problems but about aug- sept it began too leak oil. Under warranty, took to a dealer & they claimed overfilling, It's my boat alone and I know for a fact oil has not been added but the dealer drained small quantity off and sent me on my way. Well it still leaks. It's coming out breather tube into air cleaner plus out from under fly wheel. Crank seal? Seems like internal pressure to me.??? no one seems too eager to offer a solution from dealer. Anyone have ideas of where to make them look?