Hi everyone...<br />I am having problems with my OB. I can move the shifter smoothly (with engine off) through the forad position, and neutral. But once I put it in reverse it gets jammed. I took apart the control box and rebuilt it with the help of the service manual. It operates fine dissconnected from the engine. As soon as I reattach it the unit jams. I also can't put the OB in revse on the motor itself. <br />I already started by replacing the cables. <br /><br />1977 70hp mercury <br /><br />Any ideas?<br />Thanks<br />Jim