If your lawn mower starts and then stops you may be wondering Why Lawn Mower Starts Then Stops. There are a few things that could be the problem. It could be something as simple as the gas tank being empty or the spark plugs needing to be replaced.
If you’ve checked those things and the lawn mower still won’t start, it could be an issue with the carburetor. You’ll need to clean or rebuild the carburetor to fix the problem.
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Why Lawn Mower Starts Then Stops – Here Is Why
The most common reason is that the engine isn’t getting enough fuel. This can be caused by a clogged fuel filter or line, or a dirty carburetor.
Another possibility is that the spark plug isn’t firing properly. This can be caused by a fouled plug, bad wiring, or a problem with the ignition system. Finally, it could be that the engine is overheating.
This is usually caused by an air intake restriction or a problem with the cooling system. If your lawn mower starts and then stops, check these three things first to troubleshoot the problem.
Lawn Mower Starts Then Dies No Primer
If you’re having trouble getting your lawn mower to start, and it’s not the spark plug or gas, the problem could be that you’re not priming the engine correctly. The primer is responsible for delivering fuel to the carburetor, and if it’s not working properly, the engine won’t get enough gas and will die.
Here’s how to prime a lawn mower engine-
1. Remove the air filter cover and check that the filter is clean. If it’s dirty, replace it with a new one.
2. Find the primer bulb on the side of the engine and make sure that it’s not cracked or damaged in any way.
3. Push in on the primer bulb a few times until you see fuel flowing into the carburetor through the clear fuel line.
4. Replace the air filter cover and pull on the cord to start the engine. It should start right up.
Lawn Mower Died While Mowing And Won’t Start
If your lawn mower died while mowing, there are a few things you can check before taking it in for repairs. First, check the oil level and make sure it’s full. If it is, then check the spark plug to see if it’s fouled.
If the spark plug looks clean, then check the air filter to see if it needs to be replaced. Lastly, check the fuel line to see if there is any blockage. If none of these things seem to be the problem, then you will need to take your lawn mower in for repairs.
Riding Lawn Mower Starts Then Dies
If your riding lawn mower starts then dies, there are a few things that could be the cause. The most common causes are a clogged fuel filter or carburetor, a bad spark plug, or a faulty ignition coil. A clogged fuel filter or carburetor is the most common reason why your riding lawn mower starts and then dies.
If your fuel filter is clogged, it won’t allow enough gas to reach the engine. To fix this, you’ll need to clean or replace the fuel filter. If your carburetor is clogged, you’ll need to clean it with a carburetor cleaner.
Bad spark plugs can also cause your riding lawn mower to start and then die. Spark plugs ignite the gasoline in the engine and if they’re worn out or dirty, they can misfire and cause the engine to stall. To fix this, you’ll need to replace the spark plugs.
Finally, a faulty ignition coil can also cause your riding lawn mower to start and then die. The ignition coil provides voltage to the spark plugs and if it’s not working properly, it can prevent the spark plugs from firing correctly. To fix this, you’ll need to replace the ignition coil.
Lawn Mower Runs for 30 Minutes Then Dies
If your lawn mower runs for 30 minutes before dying, there are a few things that could be the culprit. It could be an issue with the gas, spark plug, or carburetor. If you’re not sure how to troubleshoot these issues, it’s best to take your lawn mower to a professional for a tune-up.
One possibility is that the problem is with the gas. Old gas can cause your lawn mower to stall after running for a while. Make sure you’re using fresh gasoline in your lawn mower and that it’s been properly mixed with oil.
If you’re still having trouble, try draining the gas completely and refilling it. Another possibility is that the spark plug isn’t firing correctly. This can be caused by a dirty spark plug or one that isn’t screwed in tightly enough.
Cleaning or replacing the spark plug should fix the problem. The last possibility is that there’s an issue with the carburetor. This part controls the mixture of air and fuel going into the engine.
If it’s not working properly, it can cause your engine to stall after running for a while.
Lawn Mower Runs for 5 Minutes Then Dies
If your lawn mower runs for only five minutes before dying, there are several possible causes. First, check the gas tank to make sure it has enough fuel. If it does, then the problem is likely with the carburetor or spark plugs.
The carburetor mixes air and fuel in the correct ratio for combustion. If it’s not working properly, the engine will run for a while on the fuel that’s already in the cylinder, but then it will die when that runs out. To fix a carburetor problem, you’ll need to take it to a mechanic or lawn mower repair shop.
Spark plugs ignite the fuel in the engine cylinders. If they’re fouled or worn out, they can cause an engine to misfire and eventually die. You can clean or replace spark plugs yourself; just be sure to use the right type of plug for your lawn mower model.

Credit: lawnchick.com
Why is My Lawn Mower Starting and Then Dying?
If your lawn mower starts then dies, there are a few possible causes. The most common cause is that the carburetor needs to be adjusted. This is a simple fix that you can do yourself.
Another possibility is that the spark plug is dirty or faulty. Again, this is an easy fix. Check the air filter to see if it needs to be replaced. These are all common issues that can be easily fixed.
How Do You Fix a Lawn Mower That Won’T Stay Running?
If your lawn mower won’t stay running, there are a few things you can do to fix it. First, check the oil level and make sure it’s full. Next, check the air filter and clean or replace it if necessary.
Eventually, check the spark plug and replace it if necessary. If these things don’t fix the problem, then you may need to take your lawn mower to a repair shop.
Why Does My Lawn Mower Keep Shutting Off?
If your lawn mower keeps shutting off, there are a few things you can check to troubleshoot the issue. First, make sure that you have enough gas in the tank. If the tank is empty or nearly empty, refuel it and try starting the mower again.
Next, check the air filter. A dirty air filter can cause the engine to stall. Clean or replace the air filter if necessary.
Further, examine the spark plug. A fouled or damaged spark plug will prevent the engine from starting. Clean or replace the spark plug as needed.
Why Does My Lawn Mower Run for 10 Minutes Then Dies?
If your lawn mower starts up and then dies after just a few minutes, there are a few possible causes. The most common issue is that the carburetor isn’t getting enough fuel. This can be caused by a clog in the fuel line or a problem with the gas tank itself.
Another possibility is that the spark plug is dirty or faulty and isn’t igniting the gasoline properly. Also, it could be an issue with the engine itself, although this is less likely.
If you’re not sure what’s causing your lawn mower to die after just a few minutes, take it to a professional for diagnosis and repair.
Conclusion
If your lawn mower starts then stops, it may be because the engine is not getting enough fuel. Check the fuel line to make sure there is no blockage. If the problem persists, take the lawn mower to a repair shop.
Also, read Where to Sell Old Lawn Mowers, How to Make Money Selling Lawnmowers & How Much is a Lawn Mower Worth?