I dropped my lower unit to replace the water pump, had the control box and lower unit in forward gear and tried to reinstall. It was having problems aligning so I took the lower unit back off and now I cannot shift the control box out of forward gear. I unhooked the shift and throttle cables to check the control box and it shift while not attached to the motor. I need some ideas what to check as it was working fine before dropping the lower unit in the first place.