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What causes black smoke underneath riding lawnmower?

In: Lawn Mowers and Garden Tools [Edit categories]

Answer:

More than likely, there is a stuck pulley that the belt is trying to spin. The black smoke is caused by friction between the belt and the pulley, heating up the belt. Check the pulley(s) for obstructions (weeds, rags, long grass stems, rope, string, dried leaves, etc) that prevent the pulley from spinning properly

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First answer by Hiramito. Last edit by Hiramito. Contributor trust: 757 [recommend contributor ]. Question popularity: 2 [recommend question].

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