You asked: Why does lawn mower keep stalling?

A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to stall.

How do I stop my lawn mower from stalling?

Preventing Mower Problems

  1. Clean your air filter regularly (replace it annually).
  2. Change your spark plugs every 1-2 years.
  3. Keep stored oil and gasoline clean. …
  4. Keep your engine clean with an engine degreaser.
  5. Use the dipstick and don’t overfill your oil reservoir.

Why does my lawn mower sputter then die?

Your mower pulls in air from outside and mixes it with gasoline for the proper explosion inside the engine. A dirty air filter inhibits the flow of air into the carburetor. Clean or replace the air filter to stop the mower from sputtering to a halt. … Replace the cap to solve sputtering and dying.

Why does my lawn mower only run for a few seconds then dies?

It could be from a dirty carburetor, a malfunctioning spark plug, insufficient flow of gas to the engine or a clogged air filter. But if your lawn mower starts then dies, the causes could also be the same. The most common cause of why a lawn mower starts then dies can be due to a carburetor problem.

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What can cause a lawn mower to stall?

What should i do when my lawn and garden engine stalls?

  • Problem. When it’s time to mow the grass or clear the driveway of snow, you count on your lawn equipment to get the job done. …
  • Causes. …
  • Stale Fuel. …
  • Blocked Gas Tank Vent. …
  • Fuel Primer. …
  • Dirty or Clogged Air Filter. …
  • Fouled Spark Plug. …
  • Dirty or Clogged Fuel Filter.

Will a bad spark plug cause a lawn mower to stall?

Poor Engine Performance



A bad spark plug often causes an engine cylinder to misfire or sound like it’s struggling. The engine might even stall out completely while you are mowing. You may also notice that it becomes increasingly more difficult to restart the mower each time that it dies.

How do you clean a carburetor on a lawn mower without removing it?

However, you can not spray the carburetor when the engine is off since it cannot do the cleaning without being propelled. All you need to do is to start the engine and spray directly at the center of the carburetor while it is running. Any deposits clogging in the carburetor will easily be removed.

Why does my lawn mower start but not stay on?

A full gas tank and oil reservoir are the essential first steps when checking why the lawn mower won’t stay running, but the problem could also be a dirty filter, clogged carburetor, improper fuel mixture, or a dirty spark plug. … However, you may need a lawn mower specialist to get you back to trimming your grass.

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Why does my Briggs and Stratton engine only run on choke?

An engine that will fire and run with the choke closed but dies when the choke is opened likely has debris at least partially blocking the fuel passages in the carburetor. In this condition the closed choke provides enough extra fuel to enter the engine to overcome the lack of fuel flowing through the other passages.

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