I have tried everything I know to try and can't get the foot of my 1997 merc 150 to line up correctly to reinstall it. I have tried putting the thing in forward and turning the shaft and also tried turning the flywheel to no avail. Shining a flashlight up the lowerunit looking at where the drive shaft enters the powerhead, it looks like something has moved up there causing the hole to be slightly blocked or something. Is this possible and if so, how do I fix it so that the foot will go in the additional one inch it needs to be properly seated? Thanks