If your Briggs and Stratton push mower starts then dies, it's likely due to a faulty spark plug. A worn-out or fouled spark plug can prevent the engine from running properly.
Check the spark plug wire for any signs of damage or wear. A damaged spark plug wire can cause the mower to die after starting.
Make sure the air filter is clean and free of debris. A clogged air filter can restrict airflow and cause the engine to stall.
A dirty or clogged carburetor can also prevent the mower from running smoothly. Check the carburetor for any blockages or buildup.
Broaden your view: How to Clean a Push Lawn Mower Carburetor
Easiest Way to Troubleshoot
The easiest way to troubleshoot a lawn mower engine, like the one in your Briggs and Stratton push mower, is to start with the spark plugs. Ensure the electrodes are carbon-free, flat-surfaced, and set to the correct gap.
Changing the fuel and air filters is a crucial step before moving on to more complex troubleshooting. This simple swap can often resolve issues with your mower starting then dying.
If the spark plugs and filters are in order, the next step is to remove the carburetor for servicing.
Discover more: How to Change Spark Plug in Push Mower
Fuel and Spark Issues
If your Briggs and Stratton push mower starts then dies, it's likely due to fuel or spark issues. A bad spark plug can cause the engine to stall, making it difficult to start.
A spark plug's electrodes can deteriorate over time due to wear and fouling, which can lead to starting problems. If you suspect a bad spark plug, try cleaning it or replacing it entirely.
The fuel level is another crucial aspect to check. Low fuel levels or stale gasoline can cause the engine to stall. It's essential to drain off old fuel and add fresh fuel to resolve the issue.
Gasoline can go "stale" within two or three weeks of being left idle, so it's a good idea to drain it off whenever you plan to stop using your mower for a while.
Here are some common electrical faults that can cause a Briggs and Stratton lawn mower's engine to stop suddenly:
- The ignition coil may run until it gets warm and then stops working.
- The ignition switch is faulty. Repair or replace the ignition switch if the engine cuts out when you turn the key back to the start position.
- The seat and deck engage safety switches are faulty or not making solid contact with the wiring system. Check the connections and the switch's integrity.
- Exposed wiring from the safety switches will short-circuit the kill switch, shutting down the engine. Insulate naked wires.
A blocked carburetor will also stop the engine. If you suspect a blocked carburetor, follow the carburetor service guide to clear the blockage.
A unique perspective: Where Is the Carburetor on a Push Mower
Check for clog
If your Briggs and Stratton push mower starts then dies, one possible cause is a clogged carburetor.
Disuse can cause a clogged carburetor, especially if your mower has been sitting idle for a while.
Evaporation of watery components in the fuel can leave behind a sticky, thick mess that clogs the carburetor.
This thick fuel doesn't flow properly or burn as it should, causing the engine to stall.
It's not possible to thoroughly clean a carburetor without removing it, but you can try cleaning it if you want.
A dirty or clogged carburetor can't balance the air and fuel mixture properly, causing your engine to not start and not cut grass.
Related reading: Honda Push Mower Not Starting
Spark Plug Problems
A bad spark plug can cause a Briggs and Stratton push mower to stall, making it difficult to start the engine. This is because the spark plug's electrodes gradually deteriorate through wear and fouling.
Possible root causes of spark plug failure include a dirty air filter, a faulty or filthy fuel injector, damage to the distributor case, or a problem with the mixture of fuel and air within the gas mower tank. You should check all of these potential issues to ensure your mower is in good shape.
A worn-out spark plug can also cause the mower to die as soon as it's turned on. If this is the case, you need to clean the spark plug or replace it entirely.
The basic rule of thumb for replacing the spark plug is getting a new one every one to two years. If your lawn mower still has a hard time staying on when the spark plug is clean, try replacing the part entirely.
Common electrical faults that can cause a Briggs and Stratton lawn mower's engine to stop suddenly include:
- The ignition coil may run until it gets warm and then stops working.
- The ignition switch is faulty. Repair or replace the ignition switch if the engine cuts out when you turn the key back to the start position.
- The seat and deck engage safety switches are faulty or not making solid contact with the wiring system. Check the connections and the switch’s integrity.
- Exposed wiring from the safety switches will short-circuit the kill switch, shutting down the engine. Insulate naked wires.
Common Issues
A faulty ignition switch is a common culprit behind a Briggs and Stratton push mower that starts then dies.
Check the ignition switch first, as it's a likely cause. If the mower starts and then cuts out when you turn the key from the start to the run position, it's a clear sign that your ignition switch is faulty.
You might like: Push Lawn Mower Starts Then Dies
Dirt or gum particles in the carburetor can also cause the mower to stall. Fuel standing for more than six weeks can oxidize and form gummy globs, which can block the carburetor jets.
The kill wire circuit is another common issue. Check the kill wire for exposed wire and insulate it with electrical tape. This can help resolve the problem.
Here are some possible causes to check:
- Faulty ignition switch
- Dirt or gum particles in the carburetor
- Overheating engine
- Blocked carburetor jets
- Faulty kill wire circuit
Featured Images: pexels.com
