Thanks for responding Frosty. When we got the hammer home last weekend I contacted the previous owner and explained the issue, he gave me a couple of things to try to disengage the clutch. When those didn't work, the previous owner (and many on this board) recommended reaching out to LG.
I reached out to LG and explained the issue, they recommended taking it apart as some of the old grease had probably seized up. We careful took the top portion apart and degreased the fly wheel and clutch.
Since none of the above worked I thought applying some equal pressure to two sides using square bar, all thread and some nuts might help pull the two components apart.
If you feel that is a bad idea and penetrating oil is a better approach,I can give that a shot.
Thanks
Ben