Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
Governor has no resistance unless engine is running. Have you removed the carburetor float bowl and checked the amount of fuel coming into the bowl? Sounds like the fuel is not adequate to keep engine running.
I see question is still open, did you find problem? I suspect the needle valve passage in the carburetor is swollen and fuel is not getting through.