Hello,<br />I just brought home a boat won on ebay with a 115 Mercury. The boat is a 79. Motor looks to be simular vintage. <br /><br />I read all the tilt/trim posts I could find on the site, but could not find one with the same issue.<br /><br />When I picked up the boat the motor was locked in the trailer position. When I went to launch for the first time I unlocked it and the motor went down slowly by itself.<br /><br />The trim pump runs in the up position but will not lift motor unless I have someone lift the motor the first couple inches. Then it will lift the motor all the way up.<br /><br />It will stay for a few seconds then slowly go down.<br /><br />It will power down as I think it should.<br /><br />I checked the oil level and it was full.<br /><br />Then I removed the vent screw and ran it up and down a few times with lifting by hand for the first few inches being required each time. Thought this would bleed the air. Still same problem.<br /><br />Any Thoughts?
<br />Jon