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Blue smoke indicates the engine is burning oil. If it is a 2-stroke, the fuel/oil mixture has too much oil. If it is a 4-stroke, there is too much oil in the reservoir or the valve seal are leaking, or the piston rings are worn.

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16y ago

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Blue smoke coming from a lawn mower could be caused by burning oil, a clogged air filter, or a problem with the engine's piston rings.


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Blue smoke coming from a lawn mower usually indicates that the engine is burning oil. This could be due to worn piston rings, a damaged cylinder wall, or overfilling the oil reservoir. It is important to address this issue promptly to prevent further damage to the engine.


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