Issue resolved! How To Stop A White Smoke from Lawn Mower

I was mowing my lawn when I noticed white smoke coming out of the engine. I shut it down and took a look at what could be wrong. The first thing that came to mind was that maybe there is oil leaking into the combustion chamber, or fuel leaking into the crankcase. Or maybe it’s something more serious like an internal problem with the engine valves? This blog post will explore some of these issues in depth so you can diagnose your own lawn mower when things go wrong!

How To Stop A Lawn Mower From Smoking?

My lawn mower started smoking after I had been using it for about 20 minutes. At first, the smoke was white and clear like steam which quickly turned into blue-grey smoke. The exhaust smells sweet too. This can indicate either oil leaking into the combustion chamber or fuel leaking into the crankcase.

If your lawn mower is smoking, it’s important to stop using it and take a look at the problem. There are a few things that can cause your lawn mower to start smoking. The most common issues are:

  • Lack of oil: This causes the engine to overheat and eventually seize up.
  • Clogged air filter: This will choke the engine and prevent it from getting enough air, leading to overheating.
  • Dirty spark plug: This will cause the engine to misfire and overheat.
  • Fuel leaking into crankcase: This can be from a bad fuel pump, or an issue with your carburetor float bowl gasket.

If you’re not sure what’s causing your lawn mower to smoke, take it to a professional for diagnosis. They will be able to tell you what’s wrong with your machine and how to fix it. In the meantime, here are some tips on how to stop a lawn mower from smoking.

How To Stop A Lawn Mower From Smoking?

The best way to stop a lawn mower from smoking is to fix the underlying cause. If you have a lawn mower that’s smoking from lack of oil, the only real solution is to take it apart and find where the leak is coming from so you can repair or replace whatever component needs it.


The same goes for any other problem listed above — if your air filter has dirt in it, clean it off; if your lawn mower is smoking because of a dirty spark plug, change the spark plug; if it’s leaking fuel in the crankcase or your float bowl gasket has gone bad, you’ll have to take apart the carburetor and replace those parts.

You may be surprised to learn that a lawn mower can emit smokes of certain shades depending on the trouble it is suffering from. The smoke can be black, white, blue or even a combination of them depending on the issue. Smoke is considered a symptom of a problem. Let’s explore each kind of smoke. 

Types of Smoke: Problem And Solution

Lawn Mower Blue Smoke

Blue smoke is caused by unburned fuel. This can be due to a number of things, such as a dirty air filter, incorrect carburetor adjustment, or carbon build-up on the piston. The best way to fix this problem is to clean the air filter (or replace it if it’s damaged), adjust the carburetor, or give the engine a good cleaning.

Lawn Mower White Smoke

White smoke is caused by burning oil, which can be due to an oil leak, incomplete combustion of fuel in the cylinder, or dirt clogging up your air filter. You will need to fix any leaks you have and make sure that there is enough oil in the crankcase. You should also clean your air filter to help improve combustion.

Lawn Mower Black Smoke

Black smoke is caused by an over-rich fuel mixture, which can be due to a dirty air filter, incorrect carburetor adjustment, or a bad fuel pump. To fix this, clean the air filter, adjust the carburetor to lean out the mixture, or replace your fuel pump.

Electric Lawn Mower Smoke

If your electric lawnmower is smoking, this indicates that something is majorly wrong! Most typically, the motor itself burns out and needs to be replaced/discarded. However, more rare (and more severe), there is a problem with the battery. This can release a lot of energy quickly and should be taken very seriously.


Because of the possibility of a battery explosion, you should immediately do the following:


  1. If the lawnmower is still plugged into the wall, un unplug it (if safe).
  2. Grab a fire extinguisher and douse the machine with the extinguisher’s contents. Be sure to get it inside the vents.
  3. Move the electric lawnmower away from anything flammable, preferably to an open-air space.

Note: Do not use the lawnmower again until you’ve replaced or reworked the battery.

Keep your family and pets away from the area where they were using/charging the lawnmower until you have had a chance to investigate further.

In Conclusion

If your lawn mower is smoking, don’t panic! There are a few things you can do to try and fix the problem yourself before taking it in for repair. However, if the smoke is blue then you should definitely take it to a professional so they can diagnose the issue and get it fixed before it causes any more damage. Thanks for reading!

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