I am helping a neighbor sell some H's her husband left her. This H was driven to its latest resting place about 5 years ago. It was covered early on but not lately. It has always had a muffler with the flap on top. Now the engine seems to be stuck. I dropped an endoscope into the cylinders through the spark plug hole and took these pictures. These are the cylinders 1-4 from left to right, facing the tractor. My guess is that #3 is the culprit with some rust in there. Is there someone out there with some experience that can comment on the condition of the cylinders and their "stuckness" based on these photos. I have read up on the methods of loosening them.