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!
The needle valve and float is what controls the fuel into the carburetor bowl. Is the needle valve seat fully open? Or can the rubber seat be swelled up and restricting the flow? If the carburetor needle seat is all metal, it will have a rubber seat in the upper housing, This can be swollen by ethanol in the fuel . Repair would be to replace the needle valve and seat, or replace the carburetor.
Is the carburetor choke fully opening? Not staying open? That would do the same thing, and would let it use much more fuel?