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HomeRepair HelpWorx RepairWorx Lawn mower starts then stalls Repair
Worx Lawn mower starts then stalls
If your Worx lawn mower starts then stalls, the problem is usually in the fuel system, not the engine itself. The most common cause is a clogged carburetor from old fuel that has turned sticky and restricted fuel flow, which is why a lawn mower starts then dies, runs then shuts off, or only runs for a few seconds. Start by checking the carburetor and cleaning it with carburetor cleaner. If that does not fix it, you may need a carburetor repair kit or a complete carburetor replacement. Next, check for old or bad gasoline, since stale fuel can create the same carburetor blockage and make the mower start and then stop. After that, inspect the fuel cap vent. A blocked fuel cap can create vapor lock and stop fuel from reaching the carburetor, so if loosening the cap helps the engine stay running, replace the fuel cap. Finally, inspect the spark plug for cracks, carbon buildup, or electrode damage, and test it with a spark plug tester to confirm strong spark. Enter your model number on RepairClinic.com to find the exact Worx replacement part that fits your mower.
01 - Worx Carburetor
The carburetor might be clogged. 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. If the carburetor is clogged, try cleaning it with carburetor cleaner. If cleaning the carburetor isn’t effective, rebuild or replace the entire carburetor.
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02 - Worx Carburetor Repair Kit
The carburetor might be clogged. 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. If the carburetor is clogged, try cleaning it with carburetor cleaner. If cleaning the carburetor isn’t effective, rebuild or replace the entire carburetor.
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03 - Worx Fuel Cap
As fuel is consumed by the engine, the level in the fuel tank lowers. To make up for this, the fuel cap uses a small vent to allow air to enter the tank. If the fuel cap vent is clogged, air won’t be able to enter the tank and a vacuum or “vapor lock” will occur. This stops the flow of fuel to the carburetor causing the engine to stall. To determine if the fuel cap vent is clogged, try slightly loosening the cap and then starting the engine. If loosening the fuel cap allows the engine to stay running it is likely clogged and will need to be replaced.
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04 - Old or Bad Gasoline
The carburetor might be clogged. 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. If the carburetor is clogged, try cleaning it with carburetor cleaner. If cleaning the carburetor isn’t effective, rebuild or replace the entire carburetor.
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05 - Worx Spark Plug
Inspect the spark plug for signs of wear or damage. If the porcelain insulator is cracked, an electrode is burned away or damaged, or there is heavy carbon buildup at the electrode, replace the spark plug. To determine if the spark plug is defective, use a spark plug tester. You should see a strong spark between the tester’s terminals when the engine is cranking. If there is no spark, this indicates that the spark plug is defective and should be replaced.
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Frequently Asked Questions
Why does my Worx lawn mower start then stall after a few seconds?
How do I know if the fuel cap is making my Worx mower starts then stalls problem worse?
Can a bad spark plug cause a Worx lawn mower to start and then die?
Should I clean or replace the carburetor if my Worx lawn mower only runs for a few seconds?
How do I find the right carburetor, fuel cap, or spark plug for my Worx lawn mower?
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