I purchased a used airplane at a very good price. I figured I could sell the OS 91 that powered it at a good price and replace it with my DLE 30.
However the OS does not seem to be in good shape although it looks good. Apparently it has been sitting awhile.It is hard to turn over and the compression seems to be down. The bearings are probably full of congealed castor or other oil.
Do you engine experts think it would be worthwhile to install a new ring and free up the bearings then sell it?