Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Hi, my name is***** will be assisting you.
This sounds like you could have an air leak between the carburetor and the block. Can you tell me if there is and adjustment screw in the bottom front center of the carburetor right below where the fuel pump is mounted on the carburetor? If so you could try to turn it out just a small amount, 1/8 of a turn should do it and see what happens.
According to your previous information you had put a new carburetor on the machine. I am a little confused, did you clean and rebuild or put on new? It would be strange to get a new carburetor that would do this. You may have to remove the welsh plug and clean the passage behind it, there are some small transition jets there that could cause your surging.
Great!! It has been a pleasure to assist you.
Please take a moment to rate your experience.