I have a sterndrive Searay with a Mercruiser 5.7 Bravo. I have developed a pretty fast leak of trim tab fluid and, for now, keep adding fluid. The trim tabs and engine trim seem to work fine. As far as I can tell, the fluid is coming from the external top portion of the motor. The leaking happens when the boat is running (in and out of gear). I am not certain if this is a job for a marina mechanic or if there is a possibility that it is something I could fix. Any thoughts? Thanks in advance...Joe