I need some advice. The first trip out this year I apparently didn't tighten down the air intake tight enough after reinstalling the battery. I am not sure how long it was off since I didn't notice it until I was flushing the ski out that night. The oil filler cap also came off and blew oil all over the engine. What is the best way to clean up the oil (or should I leave it) and how much damage can be done by sucking up unfiltered air from inside the hull?

PS There was enough oil left in the engine to register on the dipstick.