I have a Fletcher GTO Bravo 17ft speedboat. I have a 1971 1350 135hp 6cyl merc. <br /><br />If my engine is trimmed right down my boat steers to one side, when i trim it up it straightens out.<br /><br />If im going along at say 40mph and I trim it down it pulls strongly to one side again? <br /><br />Why is this happening? Anyone know?<br /><br />My skeg is in pretty poor shape, could this be my problem?<br /><br />Many Thanks<br /><br /><br />Stan