Omc V-8 1989 Ford 300, I think, pretty sure. Last year when I put my boat in the water it ran fine till I gave it some gas to see how fast it would go. SMOKE EVERYWHERE, I picked up the hood and oil was all over the port manifold. All I could think of was a loose valve cover. Could it come from anywhere eles? or is the valve cover the only place. The iol filter was tight. Any ideas ? thanks Jack