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!
In the carburetor is an electric solenoid, it has to open with the key and has to stay open as long as the key is on. It has to have 12 volts, You should hear it click each time you flip key on and off. Best test is to remove it and plug the hole. The see if engine runs.
I see question is still open, did you find problem?