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HomeRepair HelpToro RepairToro Small engine stops after a few seconds Repair
Toro Small engine stops after a few seconds
When your Toro lawn mower starts but won't stay running, the most likely cause is a clogged carburetor. Stale or ethanol-blended fuel left in the carburetor during storage can evaporate and leave a sticky residue that blocks the main jet, pilot jet, or other fuel passages. This is a common reason an engine runs for a few seconds then dies, an engine starts then dies, or a lawn mower runs then dies. Clean the carburetor with carburetor cleaner first. If cleaning does not restore steady fuel flow, the carburetor may need a repair kit with a new needle valve, gasket, or carburetor float, or you may need to replace the complete carburetor. The next likely cause is a clogged fuel cap vent. As fuel leaves the tank, the vent must admit air. If it is blocked, a vacuum forms and stops fuel from reaching the carburetor. Loosen the fuel cap slightly as a test. If the Toro lawn mower stays running, replace the fuel cap. Enter your model number to find the exact replacement carburetor, repair kit, or fuel cap for your specific Toro lawn mower.
01 - Toro Carburetor
The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the engine 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 - Toro 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 prevent the engine from starting. 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 - Toro 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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Frequently Asked Questions
Why does my Toro engine start but die after a few seconds?
Can a Toro fuel cap cause the engine to run for a few seconds then die?
Should I clean the Toro carburetor or replace it?
How do I find the correct replacement part for my Toro engine?
What should I check before repairing a Toro engine that keeps stalling?