After having my 1999 Bravo 1 in for routine service, it is blowing drive oil out the top of the drive oil container under speed. Its a stock 502mag/ b1 package, 1999, on a 29 ft Cheetah. It appears the oil is comming out of the top of the cap, and flowing down to the hot exhaust. Any ideas of what might cause this? Can air get trapped in the drive and cause this? I've run it for aprox 2 hours and it still seems to be doing it. Any ideas would be appreciated...