It's a common practice to coat the foam with oil to help filter the air entering the engine. The area near the breather hose will typically get oil soaked anyway. The foam can be washed in detergent to clean it when it gets dirty. The foam will deteriorate over time, so keep your eyes out for replacements. I usually check the lawn mower departments of the big box stores.Thanks Tom - headed over tomorrow and will reposition. I noticed previously that the foam is oil soaked - is that a normal condition? Is this another item that needs replacement? Thanks.
Have fun on the boat. I'll be pulling the cover off mine in a week or so. Can't wait to get her wet.