I have a 2000 mercury 175EFI s#OT153779. I put a new O-ring on the tilt cylinder put it all back together now I can't get the air out of the trim system. I filled up the reservoir until it started coming out with the motor all the way up, closed it and cycled the trim several times. Trim is working but squalls like low on fluid. I can't add anymore so it's full so that's why I think there is still air in the system. Any ideas?