Have restored an old JD riding mower. It lived in Florida on a horse ranch since the 1980's. Blades worn down to about 9 inches from working in the sand mowing a pasture. The deck had holes worn in it. I was surprised when it came to checking the engine, a 12hp Kubota. A new spark plug (it had an incorrect plug) filters and it ran with no smoke and remarkable power. I bought a mig welder and began learning how to weld while patching the deck. After a paint job it looks, runs, and cuts grass quite well.
Only problem remaining is getting the governor to work properly. Any ideas would be welcomed.