I looked over posts but have not seen similar. I get a noise that sounds like the trim motor upon start up and when at low RPM. I just noticed a small amount of gear oil leaking from the weep holes just under the plate where the bottom half of the outdrive bolts to the top. Hasn't lost much...
Just purchased a 2006 185 Sport. Took it out for first time yesterday. Running at low rpm there is a noise that sounds like the trim motor running. Apply a little throttle and it goes away. I have read it could be flex plate rattling in transmission, bad U joint, I have no idea where to go...