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When lawn mowers have this problem, it is impossible to fix because it is against the feeling. Some machines have normal oil, but when the carburetor is removed for cleaning and reassembling, the oil flows out all the time, even though it was just removed for cleaning and reassembling. The cause of this problem that is often found is usually traces of repairs, such as this machine that has already changed the oil. If we consider the working principle, it has nothing to do with the oil flowing out all the time because if the carburetor is normal, when the oil is full to the level of the float needle, it will stop the oil from flowing out. Let me share another case as knowledge.