Why Is My Lawn Mower Blowing Smoke?

July 3, 2019

If you mow your own lawn and take care of your lawn mower by practicing good lawn mower maintenance, as well as getting it serviced when necessary, you may find it frustrating to find that it’s blowing smoke. However, the presence of smoke doesn’t necessarily indicate that your lawn mower is in serious disrepair. There are several potential causes for lawn mower smoke, and only some types of smoke indicate that you’re in need of lawn mower repair in Ogden, UT. Keep reading to find out what your smoke means and what to do about it.

Black smoke is actually not a bad sign

Black smoke may look bad, but it usually doesn’t indicate that you’re in need of lawn mower repair in Ogden, UT. Black smoke suggests that the fuel and air mixture from your mower is too rich, resulting in the engine releasing black smoke. Combustion is incomplete because there isn’t enough air, and the unburnt fuel in the combustion chamber turns to smoke. In fact, black smoke can be created in any environment in which something is burning in an enclosed area without enough air circulation, such as when leaves are packed too tightly and then burned.

The good news is that there is an easy fix to the black smoke problem: clean your air filter. Just remove the filter and clean it with soap and water. If you’ve had the air filter a while, you may just want to replace it instead. If your lawn mower is still releasing black smoke, you may find that you’ll need to adjust the carburetor for a more diluted fuel mixture.

Cross your fingers for white smoke

White smoke could be bad, or it could be okay. The good news is, you’ll find out which one it is pretty soon. White smoke indicates that the engine is burning oil. This is usually due to a spill or accidental overfilling of the crankcase. As soon as the trace oil that has reached the engine is burned off, the smoke should clear up and your mower will operate fine. New mowers will also emit white smoke when starting for the first time. There is often oil residue left by the manufacturer, and letting the mower run to burn off the oil will solve the problem. However, if your mower continues to emit white smoke in either case, there is likely a bigger problem. Somehow, the oil has a pathway to the combustion chamber. You could have a rupture in the breathing tube, a blown head gasket or a worn seal. Whatever it is, you’ll need lawn mower repair in Ogden, UT.

Blue smoke is always a problem

Finally, if you see blue smoke, you know you have an issue and there is oil seeping into your combustion chamber, which is also one of the reasons that white smoke could be there and not going away. You’ll definitely need to contact a professional for lawn mower repair in Ogden, UT.

Ogden Lawn & Garden provides the area with sales, service and repair for lawn equipment and more. Bring your machine by and we’d be happy to give it a look as soon as possible to get it running properly again!

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