I have several OS engines that have sat around for a couple of years, and I don't intend to take anything apart. I will see how things go, if there is fuel flow and if the engines start, which I will say that I have all the confidence that they will. Rotating the props gives you a sense of feel as to how the insides are, bearing condition, and so on.

As said, if they are not broke, then don't fix them. Learning is one thing, but manufacturing problems is something else. You can tell a lot by the way they run on the ground. If they start, run, and throttle well, fly the things. What's the worse that can happen.. dead stick? If you had the right training, that should be a piece of cake.. right? [X(] Well, you get the idea.

CGr.