It’s a frustrating experience when your lawn mower starts but won’t stay running. You pull the cord or turn the key, the engine sputters to life, and then promptly dies. What gives?
There are several possible reasons why your lawn mower may be starting but not staying running. Here are the most common causes and how to fix them:
One of the most common reasons for a lawn mower to start but not stay running is a fuel problem. This could be due to a lack of fuel, dirty fuel, or a problem with the fuel system.
**To troubleshoot fuel problems, follow these steps:**
Check the fuel level. Make sure there is enough fuel in the tank. If the tank is low, fill it up.
Check the fuel filter. A dirty fuel filter can restrict the flow of fuel to the carburetor. Remove the fuel filter and clean it or replace it if necessary.
Check the fuel line. Inspect the fuel line for any cracks or leaks. If the fuel line is damaged, replace it.
Check the carburetor. The carburetor is responsible for mixing fuel and air. If the carburetor is dirty or clogged, it can cause the engine to stall.
2. Spark Plug Problems
Another common cause of a lawn mower starting but not staying running is a spark plug problem. The spark plug is responsible for igniting the fuel in the cylinder. If the spark plug is fouled or damaged, it can prevent the engine from running.
**To troubleshoot spark plug problems, follow these steps:**
Remove the spark plug. Use a spark plug wrench to remove the spark plug from the cylinder head.
Inspect the spark plug. Look for any signs of damage, such as cracks or chips. If the spark plug is fouled with carbon deposits, clean it with a wire brush.
Test the spark plug. Reinstall the spark plug in the cylinder head and connect the spark plug wire. Hold the spark plug wire away from the cylinder head by about 1/4 inch. Pull the starter cord or turn the key to start the engine. If there is a spark, the spark plug is working properly.
3. Air Filter Problems
A dirty air filter can restrict the flow of air to the carburetor. This can cause the engine to run lean, which can lead to stalling.
**To troubleshoot air filter problems, follow these steps:**
Remove the air filter. Locate the air filter housing and remove the air filter.
Inspect the air filter. Look for any signs of dirt or debris. If the air filter is dirty, clean it or replace it.
Reinstall the air filter. Reinsert the air filter into the air filter housing and secure it in place.
4. Other Problems
There are a number of other problems that can cause a lawn mower to start but not stay running. These include:
Low oil level. If the oil level is low, the engine may not be able to circulate oil properly. This can cause the engine to overheat and stall.
Dirty carburetor. A dirty carburetor can restrict the flow of fuel to the engine. This can cause the engine to run lean or stall.
Weak battery. A weak battery may not be able to provide enough power to start the engine or keep it running.
Tips for Preventing Lawn Mower Problems
Here are a few tips for preventing lawn mower problems:
Use fresh fuel. Old fuel can gum up the carburetor and cause other problems.
Keep the fuel filter clean. A dirty fuel filter can restrict the flow of fuel to the carburetor.
Inspect the spark plug regularly. A fouled or damaged spark plug can prevent the engine from starting or running properly.
Clean the air filter regularly. A dirty air filter can restrict the flow of air to the carburetor.
Check the oil level regularly. A low oil level can cause the engine to overheat and stall.
Store the lawn mower in a dry place. Moisture can damage the engine and other components.
Benefits of Fixing Your Lawn Mower
There are several benefits to fixing your lawn mower yourself:
Save money. The cost of repairing a lawn mower is typically much less than the cost of replacing it.
Keep your lawn looking its best. A well-maintained lawn mower will help you keep your lawn looking healthy and green.
Avoid the hassle of replacing your lawn mower. Replacing a lawn mower can be a time-consuming and expensive process.
Conclusion
If your lawn mower is starting but not staying running, there are a number of possible causes. By following the troubleshooting steps in this article, you can diagnose and fix the problem yourself.
With a little time and effort, you can get your lawn mower up and running again in no time.
