Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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It sounds like it is starving for fuel through the main fuel jet. It is able to run a very short time before it begins to do this. The first thing that I would do is remove the float bowl from the carburetor and clean the bowl and the main fuel jet and nozzle that is up inside the stem that the bowl attaches too. Sometimes on this model engine it is simpler to just replace the carburetor since many of the carburetor can be purchased for less than $20.00 retail.