What does it mean when black smoke comes out of the muffler of your 6.75HP push lawn mower?

In: Lawn Mowers and Garden Tools [Recategorize]

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your fuel mixture is too rich

it may be time to change your spark plug and/or air filter. a bad spark plug will not burn all the fuel correctly and a clogged air filter will not provide enough air for a good air/fuel mixture.

Actually it depends on what color smoke is coming from it. Black smoke is fuel, however, blue smoke is oil, broken ring and such

First answer by Chris Groeneveld. Last edit by Nicolashome. Contributor trust: 141 [recommend contributor]. Question popularity: 42 [recommend question]

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