I have recently discovered the Case 224 and am using the great information on this site to find my 224 tractor. Thanks to your site, I am book smart, not street smart. I recently looked at two tractors, one a 224-79 and the other a 224-81. Both start and run good. The 81 sold. The 79 I was able to run and cut grass. It smokes grey a little on the left side when it is started and the throttle is moved quickly. It is an urban tractor used only to cut about an acre of grass. No snow plow or blower. No hour meter. The owner claims that nothing other than maintenance has been done on the tractor. All the parts are there and they work. A lot of vibration and rattling at idle. Under load the engine smooths out and does its work. Owner claims to have had carburetor adjusted this spring. He also said he bought it new in 1985. What should I look for in a 79 tractor? I am not sure if this is the one. Any help would be appreciated.