If your Kohler small engine runs then dies, starts but won’t stay running, or stalls after starting, the most likely cause is a clogged carburetor. Stale or ethanol-blended fuel left in the carburetor is one of the most common root causes on seasonal equipment. As gasoline evaporates, it leaves a sticky residue that can block the carburetor’s passages and restrict fuel flow. Clean the carburetor with carburetor cleaner, then inspect the carburetor float, needle valve, main jet, and gaskets. If cleaning does not correct the problem, install a Kohler small engine carburetor repair kit or replace the carburetor. The next likely cause is a clogged fuel cap vent. When the vent cannot admit air as fuel leaves the tank, a vacuum forms and the engine may cut out. With caution, slightly loosen the fuel cap and restart the engine. If it stays running, replace the fuel cap. Whether your Kohler engine runs for a few seconds then dies or has another starting problem, enter your model number to find the exact replacement part for your specific engine.
01 - Kohler Small Engine 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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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.
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.