Why is My Lawn Mower Smoking?


If your lawn mower starts smoking, it’s a sign that something is wrong and needs to be addressed. The first thing to do is turn off the mower and allow it to cool down. Next, try to identify the color of the smoke, as this can give you a clue as to what the problem might be. If the smoke is white or blue, it could be a sign of oil spill on the engine, which might indicate a leak or worn-out piston rings.

Black smoke, on the other hand, can be a sign of a burning too much gasoline, which could cause too much fuel to burn. Blue smoke might indicate burning oil, which could be caused by a worn-out valve guide seal. Once you’ve identified the color of the smoke, you can take the appropriate steps to fix the problem or seek the help of a professional if necessary. It can be seen that regularly using the mower can dull the blade so you need to sharpen the blade or you can add new blades that result to smoothen the cutting experience and also try to maintain them regularly.

Steps to Fix Lawn Mower Smoking

Reason for white or blue smoke.

White or blue smoke coming from a lawn mower’s exhaust can be a sign of an oil leak or spill on the engine. This can happen when oil seeps into the combustion chamber and burns along with the fuel, producing smoke of a distinct color. If you notice white or blue smoke coming from your lawn mower, it’s important to check the oil level and look for any signs of leaks or spills on the engine.

Lawn Mower Smoking
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It’s also a good idea to have the mower inspected by a professional, as this type of issue can lead to engine damage if left unchecked. Regular maintenance and proper storage can help prevent oil leaks and prolong the life of your lawn mower.

Reason for Black smoke.

Black smoke coming from a lawn mower’s exhaust can be a sign that the mower is running too rich, which means it’s burning too much gasoline. This can happen when the air filter or carburetor is dirty or clogged, which can prevent proper air flow to the engine and cause it to use more fuel than necessary. Another possible cause of black smoke is a problem with the choke or fuel mixture, which can also cause the engine to run too rich.

To fix this issue, start by checking and cleaning or replacing the air filter and carburetor as needed. You may also need to adjust the fuel mixture or choke, depending on the specific problem. If you’re not comfortable making these repairs yourself, it’s best to take your lawn mower to a professional for inspection and repair. Regular maintenance and cleaning can help prevent issues with the air filter and carburetor and ensure proper fuel combustion, which can improve the performance of your lawn mower.

If necessary, Take your mower to a repair shop.

If you’re not comfortable making repairs to your lawn mower yourself, or if you’re unsure of the specific problem, it’s best to take it to a professional repair shop. A trained technician can diagnose the issue and make any necessary repairs to get your mower running properly again. They will have the tools and expertise to address a wide range of problems, from simple maintenance tasks like changing the oil and air filter to more complex issues like carburetor or engine repairs.

Additionally, taking your mower to a repair shop can help prevent further damage to the machine and prolong its lifespan. So if you’re experiencing problems with your lawn mower and aren’t sure how to fix them, don’t hesitate to take it to a qualified repair shop for assistance.


Maintaining your lawn mower is essential for keeping it running smoothly and efficiently. Regular maintenance tasks like checking the oil level, cleaning or replacing the air filter, and sharpening the blades can help prevent issues like smoke coming from the exhaust or reduced cutting performance. If you do notice smoke or other problems with your lawn mower, try to identify the color of the smoke and address the issue promptly.

Some problems can be fixed with simple repairs or adjustments, while others may require the help of a professional repair shop. Ultimately, taking good care of your lawn mower can help ensure that it lasts for many years and provides you with a well-maintained and healthy lawn.

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