Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Hi, my name is***** will be assisting you.
Based on the information that you have provided so far, it sounds like the float valve inside the carburetor is stuck and causing the carburetor to overflow with fuel which would explain the hard starting as well as the fuel on the floor if you leave the shut off valve open. I would start by doing a thorough carburetor cleaning and make certain that the float valve moves freely in the bore of the carburetor.
Thank you it has been a pleasure to assist you.
Please take a moment to rate your experience.