The discussion revolves around issues faced with a Kubota B7000 tractor, specifically concerning white smoke emission, long cranking times, and low compression in the Z650 engine. Users suggest that the white smoke may be due to injector problems or low compression in one cylinder, indicating potential issues with piston rings or sleeves. The author has performed various maintenance tasks, including adjusting valve clearance and conducting an oil filter service. As the engine is disassembled, users recommend replacing worn components, checking the crankshaft and bushings, and ensuring proper sealing. Documentation for the Z650 engine is sought, with suggestions to refer to similar models for guidance. The conversation highlights the importance of thorough inspection and replacement of critical engine parts to restore functionality. Summary generated by the language model.
