Assessing engine condition is critical when inspecting a second hand tractor. Watch the exhaust during a cold startup: excessive blue smoke indicates burning oil, black smoke points to fuel delivery issues, and white smoke can signal coolant leaks. Listen closely for unusual knocking sounds, check for blow-by at the oil cap, and verify smooth idling. https://jewana.in.net/article/where-to-find-cheap-old-tractors-for-small-acreage-guide