Mower gasoline engine exhaust pipe smoke
Do not change the oil for a long time, black smoke is generally dirty carburetor or air filter is too dirty lead - Austin
Burning for a while no, if you have been smoking, the first is more oil, and the second is the power of internal problems, pull the cylinder or oil ring locked
Two-stroke or four-stroke, two-stroke fuel oil ratio is too large, if it is four-stroke power, the new machine smoke, Ken is the power of the inverted
