OK I have this Johnson Seahorse CD-19 5.5 that I bought a 10-15 years ago then I got health problems. So now I have that in line I'm tried to go boating for the first. But the prop does not go into neutral. When I have the shifter in neutural not running the prop acts like it is in gear turns some but stops in both directions. A friend said the power unit has to taken off to remove the shifter and remove the lower end. Any idea on what the problem is so I know where to start? They say it is a great little motor. Yet to see.