I purchased mine from a guy in Kentucky, 300 miles away, ebay.
It has a 20 Hp Kohler commando. The left cylinder spark plug was carboned up. Only hitting on one cylinder. Changed plug. The left cylinder wouldn't burn cleanly. There is only one carb with no adjustments. It took me a while to figure out the carb was dirty. There are 3 tiny holes in the venture. I took compressed air. Blew out the holes and it runs very cleanly, white plugs. Every time it runs a little rough, I blow the carb out without taking anything apart, just have to remove air filter.
I do my own repairs, however if I run into something I can't handle I call Terramite. They are very helpful. So if they can't help, I'll give you a shout.
I change the oil in the engine every 75 hours and the hydraulics every 300 hours. The hydraulic oil looks like new. The engine oil needs changed.