I have an 86 Eliminator Monaco with an AQ 290 outdrive. The outdrive motor works fine on when boat is on the trailer, sitting in the water, and under 10 mph. I do notice that the outdrive will slowly sag down to fully tilted when the boat is on the trailer. The other problem is I can't trim/tilt within the range while I'm over 10mph in the water. There are no visible fluid leaks. Can anyone help with troubleshooting?<br /><br />Thank you very much in advance. I appreciate the feedback and advice from all.