I have a probelm with my '76 9.9 mercury. I will do my best to explain the problem and hope you can give me an idea how to fix it.... The motor moves (swivels) real easy... too easy. I have to hold on to it or it will swing all the way to one side or the other. Is there a set screw or somthing that I can tighten to stop it from doing this. I am worried that while I am trolling, when I let go it will cut all the way to the right/left. If there is an adjustment, where is it, and how do I go about tightening it. Thanks for all the help!