Troubleshooting a Smoky Lawn Mower with Oil in the Exhaust
If your lawn mower is spitting oil out of the exhaust and smoking, there is a good chance that it is having a problem with its internal components. This article will guide you through a series of steps to diagnose and fix the issue. Whether your mower is a Briggs Stratton or another brand, this comprehensive guide will have you back in the lawn-clearing game in no time.
Common Causes of Oil in the Exhaust
There are several potential causes for oil in the exhaust from your lawn mower, but the most common ones include:
1. Oil Level Too High
One of the most common reasons for oil in your mower's exhaust is an oil level that is too high. This excess oil is pushed into the combustion chamber, leading to smoking and oil being expelled through the exhaust.
Solution:
Drain the excess oil to the proper level. Ensure that the oil level is as per the manufacturer's recommendations.
2. Clogged Air Filter
A clogged air filter can restrict airflow, causing the engine to run rich, leading to oil being burned. This results in smoke and possibly oil in the exhaust.
Solution:
Inspect and clean or replace the air filter as needed. A clean air filter helps maintain optimal performance and prevents unnecessary burning of oil.
3. Oil-Fouled Spark Plug
If the spark plug is covered in oil, it can cause poor combustion and lead to smoking. This is a sign that the spark plug needs to be attended to.
Solution:
Remove and clean the spark plug. If the spark plug is severely fouled, it may need to be replaced to ensure the engine runs efficiently.
4. Oil Leaks
Inspect your mower for any oil leaks around the engine or seals. If oil is leaking into the combustion chamber, it can cause smoking. Tighten any loose bolts and replace any damaged seals or gaskets.
Solution:
Identify and fix any leaks to prevent oil from entering the combustion chamber and causing smoke.
5. Worn Engine Components
Worn piston rings or valve seals can allow oil to enter the combustion chamber, leading to smoking. These issues may require more extensive repairs than just oil or air filter changes.
Solution:
If the piston rings or valve seals are worn, you may need to replace them to address the root cause of the issue.
6. Clogged Muffler
A clogged muffler can cause back pressure, leading to oil being pushed out of the exhaust. This is a frustrating problem as the muffler is a critical component for reducing noise and ensuring the engine runs smoothly.
Solution:
Clean the muffler if it is clogged. If it is too worn, you may need to replace it to restore optimal performance.
7. Incorrect Fuel Mixture
If your lawn mower is a two-stroke engine, ensure that you are using the correct oil-to-fuel ratio. An incorrect mixture can lead to poor combustion and smoke.
Solution:
Adjust the mixture according to the manufacturer’s specifications to avoid this issue.
8. Consult the Manual
Always refer to your lawn mower’s manual for specific troubleshooting steps and maintenance recommendations. The manual is your best source of information and guidance for your specific model.
Conclusion
By following these steps, you can diagnose and fix the issue with your lawn mower's exhaust smoke and oil. Regular maintenance, such as oil changes and air filter replacements, can help prevent these problems from occurring in the future. If you have exhausted all these steps and the issue persists, it may be best to consult a professional technician.
Remember, a well-maintained lawn mower not only performs better but also lasts longer. So, take the time to address these issues and enjoy a cleaner, smoother-running mower.