Briggs and Stratton is a popular brand of small engines that power lawnmowers, generators, and other outdoor equipment.
But a common problem with Briggs and Stratton engines is that they blow oil out of the exhaust.
Not only is this problem frustrating, but it can also cause damage to your engine if left untreated.
In this post, we’ll explore the possible causes of this issue and provide some solutions.
Briggs and Stratton Blowing Oil Out Exhaust
Causes of Briggs and Stratton Blowing Oil Out Exhaust
1. Overfilling the oil
One of the most common causes of oil blowing out the exhaust is overfilling the oil.
If you add too much oil to your Briggs and Stratton engine, it can cause the crankcase to become pressurized, which forces oil out of the breather tube and into the exhaust.
To avoid this, always check your oil level before starting your engine and follow the manufacturer’s recommendations for oil capacity.
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2. Worn piston rings
Another possible cause of oil blowing out the exhaust is worn piston rings.
Over time, the piston rings in your engine can wear down, allowing oil to leak into the combustion chamber and be burned off in the exhaust.
If your engine is burning oil while also blowing it out the exhaust, this may be the cause.
3. Clogged breather tube
The breather tube is responsible for releasing excess pressure from the engine’s crankcase. If this tube becomes clogged with dirt, debris, or oil,
it can cause pressure to build up in the crankcase and force oil out of the breather tube and into the exhaust.
Solutions to Briggs and Stratton Blowing Oil Out Exhaust
1. Check and adjust oil level
If your engine is blowing oil out of the exhaust, the first thing to check is the oil level. If it’s overfilled, drain some oil out to the proper level.
If it is low, add the recommended amount of oil to the engine.
Always check the oil level before starting the engine, and follow the manufacturer’s recommendations for oil capacity.
2. Replace worn piston rings
If worn piston rings are causing the issue, you’ll need to replace them.
This can be a complex and time-consuming process, so it’s best to consult a professional mechanic or small engine repair shop to have it done.
3. Clean the breather tube
If a clogged breather tube is a cause, you can try cleaning it yourself. First, disconnect the tube from the engine and check for any blockages.
If you find debris or oil, use a soft-bristled brush to clean it out.
You can also try spraying the tube with a carburetor cleaner or compressed air to remove any remaining debris.
Once you’ve cleaned the tube, reattach it to the engine and check if the problem persists.
How can I prevent oil blow-by in my Briggs and Stratton engine?
To minimize the risk of oil blow-by in your Briggs and Stratton engine, follow these preventive measures:
- Maintain the proper oil level: Regularly check and maintain the oil level within the recommended range.
- Change the oil regularly. Follow the manufacturer’s guidelines for oil change intervals and use the recommended oil type.
- Perform routine maintenance: Keep up with scheduled maintenance tasks such as air filter cleaning or replacement, spark plug inspection, and overall engine tune-ups.
- Avoid overloading the engine: Do not exceed the engine’s recommended load capacity, as excessive strain can contribute to increased oil blow-by.
- Use high-quality fuel: Ensure that you use clean, fresh, and appropriate fuel to prevent engine issues that could lead to oil blow-by.
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FAQ
Why is my Briggs and Stratton engine blowing oil out the exhaust?
There are several possible causes, including overfilling the oil, worn piston rings, or a clogged breather tube.
How can I prevent oil from blowing out of my Briggs and Stratton engine?
Always check and adjust the oil level before starting the engine, and follow the manufacturer’s recommendations for oil capacity.
Also, make sure to keep the breather tube clean and free of debris.
Can I still use my Briggs and Stratton engine if it’s blowing oil out the exhaust?
If your engine is blowing oil out of the exhaust, you shouldn’t keep using it. This can hurt the engine and make it last less long.
Can I fix the issue myself, or do I need to take it to a professional?
It depends on the cause of the issue. If it’s a simple fix, like adjusting the oil level or cleaning the breather tube, you may be able to do it yourself.
However, if it’s a more complex issue, like worn piston rings, it’s best to consult a professional mechanic or small engine repair shop.
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How often should I check the oil level in my Briggs and Stratton engine?
It’s recommended to check the oil level before each use, or at least once a month if the engine is not in regular use.
Can overfilling the oil cause oil blow-by in a Briggs and Stratton engine?
Yes, overfilling the oil in a Briggs and Stratton engine can result in increased crankcase pressure and cause oil blow-by.
It’s crucial to maintain the oil level within the recommended range specified in the engine’s manual to prevent this issue.
What causes worn piston rings in a Briggs and Stratton engine?
Worn piston rings in a Briggs and Stratton engine can occur due to factors such as engine age, prolonged use, inadequate maintenance, or poor lubrication.
Over time, the piston rings can wear down, losing their ability to seal the combustion chamber effectively and resulting in oil blow-by.
Final Remarks
Lastly, a common Briggs and Stratton problem is oil coming out of the exhaust. This can happen if the oil is too full, the piston rings are worn, or the breather tube is clogged.
Some ways to fix this problem are to check and adjust the oil level, replace worn piston rings, and clean the breather tube.
If you don’t know what to do, you should always ask a professional mechanic or a small engine repair shop for help.
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