Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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This sounds more like a carburetor problem to me than it does an inverter. The inverter has nothing to do with the engine running. You would need to fix the engine running issue before you will know whether the inverter is bad or not. Try removing the air filter and spraying carburetor cleaner directly into the throat of the carburetor and see if you can keep it running longer. My thought is that the carburetor needs to be cleaned thoroughly which will most likely solve your problem.
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