I've got a 1975 115Evinrude v4, model 115593. I was having a problem with not shifting cleanly into forward--reverse, no problem. I am trying to find the right adjustment for the shift cable. It seems there aren't enough threads to tighten the connector far enough. The bell crank screw that attaches the shift rod connector keeps backing out. I tightened it up and it worked for several days. Now it's back out again and I can't seem to find the "sweet spot". Any ideas on how to keep that bell screw in, and how to find the proper alignment for the cable? I've tried moving the sleeve back and forth to find the center of play, and adjusted the trunion both ways, but can't seem to find center so the motor will shift cleanly. thanks,<br />blt