Possible Causes for Oil Coming Out Of Carburetor Briggs and Stratton

Featured Image Credit: Pinterest.com

Oil coming out of carburetor briggs and stratton – In the lawnmowers segment, Briggs and Stratton is one of the leading and most reputable names. Most of the engine found on the residential lawnmowers is the Briggs and Stratton.

Sadly, although providing the best service for a very long period, these engines are particularly vulnerable to occasional problems, just like other mechanical equipment.

Users frequently become frustrated as a result of the issue’s regular frequency. Despite the variety of challenges, each and every one has a perfect remedy.

By following the correct troubleshooting procedures, you can quickly resolve the particular problem. You will consequently get the most enjoyment out of the product.

Oil pouring out of a carburetor on a Briggs and Stratton engine is one of the most prevalent problems that individuals encounter. Of course, that is a fixable issue, but it aggravates and frustrates the people.

Additionally, it gives you the impression that you should get a different lawnmower rather than repeatedly dealing with the issues.

You can relax knowing the main reasons and remedies for this issue. Do you consider why this is the case?

When you are aware of the potential causes, you can take adequate maintenance and prevention measures earlier. As a result, you may use the Briggs & Stratton lawnmower to its full potential without ever having to deal with this headache.

Also, read this our featured article: How to Tee Off An Existing Gas Line

Why Does Oil Coming Out of Carburetor Briggs and Stratton?

As soon as witnessing the oil leakage, people often panic and think they need to spend all their savings on repairing it. Try to avoid overthinking and be calm. Knowing the root cause of the problem provides the best and cost-effective solution.

Instead of worrying, check out the following section carefully. It explains the major reasons and solutions for oil leakage. It gives you enough insight on what to do to fix the oil leakage on Briggs and Stratton.

Tipped on Its Side

One of the most common reasons for oil coming out of the Carburetor is the tipped Briggs and Stratton mower on its side. Keep in mind that lawnmowers are extremely sensitive.

You have to handle it properly to get the most out of its benefits. If you handle it wrongly, then it costs you more to get repaired.

Even a 15-degree shift when tipped can become the reason for the oil to leak. Badly, 15 degrees are enough for the Carburetor to point down and leak oil into the breather tube. So, you should be careful and use the mower properly.

Mowing the lawn, which has too much of the steep incline, is the easiest way to happen this trouble. However, in many cases, you find the problem lately, and the mower is already started to leak the oil.

Besides, many ways are there for tipping, which causes the oil leaks. The most common is tipping the mower on its side when you are cleaning blades.

Air Filter 

The Briggs and Stratton lawnmower’s main issue is a gas and oil leak in the air filter. It’s not a big deal if your lawnmower’s air filter has a tiny bit of oil on it. But too much oil negatively affects the carburetor.

Too much oil in the air filter will start to drip and become stuck in the carburetor. You now know how the carburetor is impacted by the oil in the air filter. On the other hand, the oil may even leak in its own manner and dribble into the filter box.

To determine the amount of oil in your air filter, you must run certain experiments. Do you realise that a lack of oil on the air filter makes it more likely to catch dust particles, which thoroughly circulate inside the mower? Therefore, to guarantee that your mower operates effectively, make sure the air filter only has a minimal amount of oil.

Also, read this: Honeywell Thermostat Cool on Blinking


Another important part of the lawnmower is the crankcase breather. It assists in alleviating the pressure inside the mower, which never takes more than 1quart of oil.

It is because more than 1quart creates too many problems. Carburetor, cylinder, and air filter are the major places for winding up excess oil.

The Briggs and Stratton mower engine is not working properly if the crankcase does not contain the right amount of oil. In such a case, you have to check for the presence of leaked oil.

If you find the oil leakage, it indicates the overflow of the crankcase. The overfilled crankcase is highly dangerous and makes the mower work below its full potential.

Blown Head Gasket

One of the most damaging yet expensive causes of oil leakage from Carburetor is the blown head gasket. Even though Briggs and Stratton’s mower comes with various critical parts, the head gaskets are often blown out. You will experience this problem even if you are not making any mistakes.

This is the only thing making the people think badly about the Briggs and Stratton mower. The overheated mower is the major cause of this problem.

Too much use frequently results in overheating because it leads to expansion inside of the mower. Thus, it can blow the mower’s head gasket.

Once the head gasket has below out, you will notice the oil leak before starting the mover. Or else, the mower does not start or stop when mowing. Witnessing these things indicates that your mower has the blown head gasket and needs immediate attention.

Carburetor Float

When taking the list of the essential parts of the Carburetor, the carburetor float always holds a top position. Since it is responsible for the flow of fuel into the engine in the mower, it is the core aspect of an oil leak.

The first place you have to check for oil leakage is the carburetor float, and thus you will save your mower from costly repairs and replacements.

Remember that excess fuel or oil can leave behind the residue and cause the Carburetor to float to work inappropriately. As a result, it causes many potential damages.

All these things lead to both gas and oil leakage of the Briggs and Stratton mower. If the Carburetor has the backflow of fuel or oil, it will leak out and then work its way throughout the lawnmower. Never allow old fuel to sit inside the mower for a long time to avoid this hassle.

Possible Solutions for Major Oil Coming Out Of Carburetor Briggs and Stratton Causes

So far, you have read the major cause of the oil leakage in the Carburetor. Here is the best way to fix them quickly and avoid too much stress.


The only solution to avoid this issue is to stop mowing at steep inclines completely. Thus, it results in no oil leak from the Carburetor. Never mow at the incline unless you own the best zero-turn mowers. Give special attention when cleaning the mower.

Avoid tip it on its side when cleaning the blades. Then, tilt the air filer upwards to clean the mower safely, and thus, you never experience any oil leak. This way also removes the risk of oil leaking out of the Briggs and Stratton Carburetor.

Oil in the Air Filter

Whenever the air filter becomes soaked in the oil, squeeze it out. It is similar to the way you squeeze out excess water in the cloth. After squeezing the excess oil out of the filter, place the air filter back into the mower.

Make sure you place it correctly. Then, clean the Carburetor to remove the rest of the oil before running the mower again. It means you need to be careful and clean the mower properly to avoid hassles.

Blown Head Gasket

The only solution for this problem is full repair or part replacement. But, whether you decide to repair or replace it, you have to spend between $300 and $1200 on riding the mower again.

By spending less than $90, you can replace the head gasket on the mower on your own. However, it is always advisable to hire the professional and do the replacement or repair. It is because they know the right way to handle the mower and fix the problem quickly.

Overflow of Oil in Carburetor

Buy the carburetor repair kit from Briggs and Stratton to resolve this major problem. This kit is extremely easy to use and available at affordable pricing.

Ensure you follow the directions properly. If you hesitate to use this kit, then buy it and bring the kit to the professional.

The professional will quickly fix the gas or oil overflow in the Carburetor because they have huge experience and knowledge.

Most of the specialists would not charge you more than $20/hour for labor, and thus, you will save more of your time and money. In addition, buying the repair kit saves you on the markup of the engine parts.

Also, you can read this: Samsung Washer UR Code


Use the dipstick to check the oil level in your crankcase. It helps you to avoid overfilling and puts the mower into the hassle. Stagger your pours while adding oil to the crankcase, and thus you will avoid the overflow issue easily.

Whenever pouring the oil, do not forget to use the dipstick to avoid filling oil more than 1quart.

Things You Should Know:

Plenty of vital things need to know about Briggs and Stratton to keep it work at optimal condition for a long time. Here are some of them!

  • It is always recommended to access SAE 30W oil for all kinds of lawnmowers. This high-performance oil needs to be above 40degrees Fahrenheit to work optimally. Pour the oil slowly and check its level using the dipstick to avoid overfilling.
  • It is mandatory to check the carburetor slide for free movement before starting the engine.
  • Try to remove the air filter open and confirm the slide value is closed completely. Check the airflow to the Carburetor often.
  • Call the professional to repair or replace the mower instead of performing DIY steps. Experts know the right way to handle the issue and prevent the same issue in the future. Additionally, they tell you the right maintenance steps to follow.

So, you have understood the most common causes for oil coming out of carburetor briggs and Stratton. Use the mentioned solutions to fix the problems. If you are unable to get the right solution, call the professional.

Home Base Project Team
Home Base Project Team
At The Home Base Project, we offer practical, real-life tips and inspiration about DIY, decorating and gardening. The Home Base Project provide the best information about home renovation and design, connecting home design enthusiasts and home professionals across the world.


Please enter your comment!
Please enter your name here