Hello,<br /><br />I realize this is a frequently covered topic, but I did not find the solution in the discussion board. I have a 1971 100HP Hydro Electric Shift. 100ESL71C<br /><br />Currently, the unit is stuck in forward at all times making boating a little difficult. I have the proper C grade LU oil, and I was wondering if anyone had advice?<br /><br />Also, the "shift box" was frequently referred to and I am not aware of the location or purpose. Any and all advice is welcome<br /><br />Thank you,<br />Dive Bird