Lawn Mower Starts Then Stops: Quick Reasons & Solutions

We know that you may have searched for a bundle of guides about diagnosing the problem in lawnmowers but still, you are confused. But no more confusion! We will surely help you in providing your desired knowledge about “lawn mower starts then stops”.

We will have a look at why your lawn mower is not working and the reasons behind it in this article. Furthermore, by the end of this article, you will be able to troubleshoot and tackle the problems in your lawn mower. If your lawn mower starts and then stops, you want a quick answer about what’s to blame, and what is needed to be fixed.

Let’s have a look at its further details!

Lawn Mower Starts Then Stops: Possible Reasons

There are several possible causes and solutions to consider if your lawn mower starts and then stops:

• A clogged fuel filter can prevent fuel from properly flowing to the carburetor, causing the engine to start and then stop. The problem can be resolved by cleaning or replacing the fuel filter.
• Over time, old fuel can degrade and clog the carburetor, causing the engine to stall. Remove the used fuel and replace it with new fuel.
• A faulty spark plug can cause the engine to start and then stall. If the spark plug is worn or fouled, it should be replaced.
• A clogged carburetor can cause the engine to stall. Using a carburetor cleaner or having it professionally cleaned, clean the carburetor.
• If the air filter becomes dirty or clogged, the engine may be unable to breathe properly, causing it to stall. To restore proper airflow, clean or replace the air filter.
• If the safety switch is not properly engaged, the engine may start and then stop. Examine the safety switch and make any necessary adjustments.
• If the fuel cap is not properly vented, it can create a vacuum in the fuel tank, causing the engine to stall. Replace or clean the fuel cap.

Explanation: Lawn Mower Starts and Then Stops

If your lawn mower starts and then stops, there can be multiple reasons behind it. Therefore, we are going to troubleshoot these reasons. Let’s have a look at them!

Dirty Carburetor:

If you have a dirty carburetor or its bowl is blocked, your lawn mower will start but will end up dying shortly after pulling the cord.

Old Fuel:

It is suggested by the manufacturer to drain the oil or add a stabilizer before you winterize the lawn mower. But when you do this negligence and in the absence of a stabilizer, the solid tends to settle out from oil and block the carburetor. That’s why, if you use a lawn mower after a long period, you need to drain out the old fuel and have to add a new one.

Repairing Issues:

Besides these reasons, there can be some repair issues. If the recoil starter rope isn't fully backed off, you won't be able to supply enough torque to the engine to turn it over. If it does, you will need to remove the starter assembly to replace it.

Spark Plugs:

Spark plugs are very important for your lawn mower’s ignition system. But if your sparks are dirty, uncleaned, and faulty then they may not be able to provide the spark to your engine. Your lawn mower will start and then stop quickly.

Final Thought: