On the 4th I was cruising' along all was well with the world. Running about 45mph, the sun was shinning, the water was calm. Then I heard this HORRIBLE knocking and clanging coming from the engine. I back off the throttle immediately and opened the engine hatch. Still knocking and clanging I went to shut her down but, before I could get there she quit. Dead... the engine would turn over but wouldn't fire. Some very nice people in a Four Winns runabout offered to tow me the 4 miles back to the landing (they are my new best friends). On the way back I opened the hatch again and noticed that my bilge was FULL of oil. So after a month and a half of boat ownership my season just got shorter and, although it hasn't been diagnosed yet, I presume very expensive.