I just changed the water pump on my 1987 115hp Mercury outboard. Overall, things went ok. Put the throttle into forward when I started. When I put the unit back on, it seems it will only stay in "forward" no matter what you do with the throttle/shift control. I dropped the lower unit again. I separated the lowered the lower unit enough that I got access to the shift rod which was then separated. I tried turn the shift rod with a pair of vice grips (not forcing it) the full ~90 degree range and the propeller acted as if it was ALWAYS in forward. I didn't do anything to the lower gear box and it ran fine when I started. Am I missing something? I have the lower until detached right now. I'm kinda at a loss. Any suggestions?