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HomeRepair HelpHusqvarna Mower RepairHusqvarna Lawn mower starts then stalls Repair
Husqvarna Lawn mower starts then stalls
If your Husqvarna lawn mower starts then stalls, the problem is usually in the fuel system. The most common cause is a clogged carburetor from old gas left sitting in the mower, which can make a lawn mower starts then dies, runs then shuts off, or only runs for a few seconds. Try cleaning the carburetor with carburetor cleaner first. If that does not fix it, a carburetor repair kit or a full carburetor replacement may be the right move. Another likely cause is stale or bad gasoline, which leaves sticky deposits behind and creates the same stalling problem. After that, check the fuel cap vent. If the vent is blocked, the tank can develop vapor lock and cut off fuel flow to the carburetor, causing the mower to start and then stop. A worn or fouled spark plug can also cause a Husqvarna lawn mower to start then stall, so inspect it for damage or heavy carbon buildup and test it with a spark plug tester. Enter your model number on RepairClinic.com to find the exact Husqvarna carburetor, fuel cap, spark plug, or other replacement part that fits your mower.
01 - Husqvarna Lawn Mower 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 - Husqvarna Lawn Mower 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 - Husqvarna Lawn Mower 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 - Husqvarna Lawn Mower 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 Husqvarna lawn mower start then stall after a few seconds?
How do I tell if the fuel cap is causing my Husqvarna mower to start and then die?
Can old gas make a Husqvarna lawn mower runs then shuts off?
My Husqvarna lawn mower has spark but won't stay running. Should I still check the spark plug?
How do I find the right Husqvarna carburetor, fuel cap, or spark plug for my mower?
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