This Is Why Your Ariens Lawn Mower Is Smoking

by Jack Grover
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Are you noticing thick smoke coming from your Ariens lawn mower? Don’t worry, we’ve got you covered. In this article, we’ll delve into the possible causes behind the smoke and provide you with practical solutions.

From clogged air filters to low engine oil levels, various factors can contribute to this issue. By understanding the reasons and following our expert advice, you’ll be able to troubleshoot and resolve the problem effectively.

Say goodbye to the smoke and hello to a smoothly running lawn mower.

Key Takeaways

  • Smoking in an Ariens lawn mower can be caused by various issues such as a clogged air filter, insufficient engine oil level, bad engine gasket, and internal engine damage.
  • Regularly cleaning and replacing the air filter can prevent the engine from running rich and emitting black smoke.
  • Checking the engine oil level before each mowing and addressing any leaks or excess oil can help prevent smoking caused by insufficient oil level.
  • In the case of a bad engine gasket or internal engine damage, it is recommended to consult a small engine mechanic for proper diagnosis and repair.

Clogged Air Filter

If your Ariens lawn mower is emitting smoke, it could be due to a clogged air filter. The air filter is important because it prevents dirt and grass clippings from entering the combustion chamber and keeps the engine running smoothly. Over time, debris can accumulate in the air filter, limiting airflow and causing the engine to run rich. This means there’s an excess of fuel in the air-fuel mixture, resulting in incomplete combustion and the production of black smoke.

To prevent smoking issues, it’s essential to regularly clean and replace the air filter. Start by removing the filter from the mower and tapping it gently to remove loose debris. If the filter is still dirty, wash it with warm soapy water and let it dry completely before reinstalling. If the air filter is damaged or too dirty to clean, it should be replaced with a new one.

A clogged air filter not only causes smoking but can also lead to further engine damage if not addressed promptly. Running the mower without an air filter can allow larger particles to enter the combustion chamber, potentially damaging the piston rings and cylinder walls. This can result in reduced engine performance and increased oil consumption.

Insufficient Engine Oil Level

Regularly checking the oil level in your Ariens lawn mower is crucial to prevent any potential engine damage. Insufficient engine oil can lead to smoking and serious issues that can affect your mower’s performance. It’s important to understand that simply adding fresh oil may not solve the problem if there’s already been damage to the engine.

To prevent insufficient engine oil, it’s recommended to check the oil level before each mowing session. This can be done easily using the dipstick provided with your mower. Make sure that the oil level falls within the recommended range indicated on the dipstick. If it’s below the recommended range, it’s essential to add the appropriate amount of oil to bring it back to the correct level.

On the other hand, it’s also important to avoid adding too much oil as it can cause issues. Excessive oil can increase crankcase pressure and result in the oil burning off, leading to smoke and potential engine damage. If you accidentally add too much oil, it’s necessary to remove the excess and check the air filter for any oil contamination.

Regularly checking the engine oil level is a simple maintenance task that can prevent smoking and potential engine damage in your Ariens lawn mower. By ensuring that the oil level is correct, you can keep your mower running smoothly and efficiently for years to come.

Bad Engine Gasket

Is your Ariens lawn mower emitting smoke? It could be due to a bad engine gasket. The engine gasket is a crucial component that seals the different parts of the engine together, preventing oil and other fluids from leaking out. When the gasket becomes damaged or worn out, it can lead to oil leaks, which can then burn off and create smoke.

Here are three key points to understand about a bad engine gasket:

Firstly, signs of oil leakage are one of the primary indicators of a bad engine gasket. Take a look at your mower and check for any signs of oil pooling or dripping. If you notice oil stains or a strong smell of burning oil, it’s likely that the engine gasket is the culprit.

Secondly, repairing or replacing the gasket is necessary to address the issue. However, this isn’t a job for the average homeowner, as it requires technical skill and knowledge. It’s highly recommended to consult a small engine mechanic who can properly diagnose the problem and perform the necessary repairs.

Lastly, once the engine gasket has been repaired or replaced, it’s crucial to take steps to prevent further smoking. This includes regular maintenance, such as checking the oil level before each mowing session and ensuring that the engine is properly lubricated. Following the manufacturer’s guidelines for maintenance and using the correct type and amount of oil will help keep the engine running smoothly and prevent future issues with the gasket.

Internal Engine Damage

Smoking from your Ariens lawn mower could be a sign of internal engine damage. This refers to any harm or malfunction that occurs within the engine components, such as the piston rings, valve train, or crankshaft. When these parts are damaged, smoke can be emitted, and it’s important to address the issue promptly to prevent further complications.

To help you understand the potential causes and solutions for internal engine damage, let’s take a look at the following table:

  • Piston ring problems: If you suspect issues with the piston rings, performing leak-down and compression checks can help diagnose the problem. In some cases, an engine teardown and inspection may be necessary.
  • Burnt valves: Overheating can lead to burnt valves, which require professional evaluation and repair. It’s best to consult a small engine mechanic for proper diagnosis and repair in these cases.

Identifying internal engine damage can be challenging, but there are some signs to watch out for. For example, if you notice smoke accompanied by oil on the spark plug, it may indicate issues with the piston rings or valve train. Excessive overheating can also cause damage to various engine components, leading to smoke emissions.

If you suspect internal engine damage as the cause of smoking from your Ariens lawn mower, it’s recommended to consult a professional small engine mechanic. They’ve the knowledge and expertise to accurately assess the damage and provide appropriate solutions.

Excessive Fuel Burning

Is your Ariens lawn mower burning more fuel than usual? Excessive fuel burning can cause a range of issues, such as reduced engine performance, increased fuel consumption, and the production of black smoke. Here are three common reasons why your Ariens lawn mower might be burning excessive fuel:

First, a clogged fuel system can restrict the flow of fuel to the engine, leading it to burn more fuel than necessary. This can be caused by a dirty fuel filter, a blocked fuel line, or a malfunctioning fuel pump. To ensure proper fuel flow, it’s important to regularly inspect and clean the fuel system components.

Second, an improper carburetor adjustment can result in a rich fuel mixture, causing excessive fuel burning. The carburetor is responsible for mixing the fuel and air in the correct proportions for combustion. If you’re unsure how to adjust the carburetor, consult your owner’s manual or seek professional assistance.

Third, a faulty ignition system can cause incomplete combustion, leading to excessive fuel burning. Check the spark plug for signs of wear or damage and replace it if necessary. Also, make sure the ignition coil and spark plug wire are functioning properly.

By addressing these issues, you can improve the fuel efficiency of your Ariens lawn mower and reduce excessive fuel burning. Regular maintenance, such as cleaning or replacing fuel system components, adjusting the carburetor, and inspecting the ignition system, is key to ensuring optimal performance and preventing further fuel-related problems.

Taking these steps will help you keep your Ariens lawn mower running smoothly and efficiently, saving you fuel and ensuring a well-maintained lawn.


In conclusion, understanding the possible causes of smoke emission from your Ariens lawn mower is essential for troubleshooting and resolving the issue. Whether it’s a clogged air filter, insufficient engine oil, a bad engine gasket, internal engine damage, or excessive fuel burning, knowing how to address these problems can help ensure your mower operates smoothly and efficiently.

If your attempts to fix the smoke issue prove unsuccessful, it may be necessary to seek professional help. With proper maintenance and care, you can keep your yard looking pristine and smoke-free.

Frequently Asked Questions

How Do I Clean and Replace the Air Filter on My Ariens Lawn Mower?

To clean and replace the air filter on your Ariens lawn mower, first locate the air filter housing. Remove the cover and inspect the filter for dirt or damage. Clean or replace the filter as needed, ensuring a proper fit before reassembling.

What Are the Signs of Oil Leakage on a Lawn Mower and How Can I Repair It?

If you notice oil leakage on your lawn mower, it could be a sign of a faulty engine gasket. To repair it, check for oil leakage, then consult a small engine mechanic for proper diagnosis and repair.

How Can I Diagnose and Address Internal Engine Problems in My Ariens Lawn Mower?

To diagnose and address internal engine problems in your Ariens lawn mower, perform leak-down and compression checks. Look for signs of oil leakage and consult a small engine mechanic for proper diagnosis and repair.

What Are the Common Causes of Black Smoke and How Can I Adjust the Carburetor to Fix It?

To diagnose black smoke and adjust the carburetor, check for a rich fuel mixture. A dirty air filter can cause insufficient airflow, so replace it. Follow the owner’s manual for carburetor adjustment instructions. Seek professional help if needed.

When Should I Seek Professional Help for White or Blue Smoke Issues in My Ariens Lawn Mower?

If white or blue smoke issues persist after attempting DIY fixes, seek professional help. These colors may indicate air leaks or worn-out components. Check your warranty for potential free repairs or consult a reliable small-engine repair shop.

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