the engine was rebuilt ( rings and Bearings gaskets and seals only) i ran it on break in oil 40w ran the engine up to 4000 rpm,s for about 1/2 hour ,,everything ran great ,,went back to the shop ,changed the oil and filter ,went out again with the new driver ,ran it all out 5450 on the limiter ,,the boat was fast ,,so we stoped and looked into the bilge , and found about 4 qts of oil in front of the engine ,,,logic would dictate the only thing you changed was the filter ,,so i put on a new one ,,went back out ,,with the same results ,,,sugestions from great people ,,,timing cover seal ,,changed twice,,timing cover gkt,,changed ,,no help ,,,check bolt holes in front of engine ,,none open nor leaking,,, it does not do it on the hose ran up to 5000 until i ran out of water pressure,, so ,,if someone is suggesting foul play , i would gladly welcome you or anyone you might know to come down and run this boat,or gladly would listen to any more suggestions ,the critics might have,,,thanks in advance hhmmmmm