Mercruiser 120hp Alpha 1 1983. I pulled the drive to replace the u joints. Shifted to forward pulled drive replaced the joints, tied the prop in forward with a bungee cord and replaced the drive. It went in all the way with no forcing. Just slipped in to about 3/4 " and a slight push and it went home. Now it shifts to forward and throttle works fine. Trying to shift to reverse it moves about 1" and seems to be in reverse(cannot move prop). The shifter does not move the throttle cable after this small movement. What did i screw up. It seems something is binding the cable. These are new cables and a new shift cable and new shift bushings. Worked fine before I removed drive. Please help!