I started off this spring with fuel leaking from the carb and out of the air filter anytime I left the fuel switch on. I took the carb apart but couldn't see a problem. I assumed the float pin was not sealing off the fuel flow, so I replaced the carb and put on a clean air filter. It stopped the fuel leaking but it still wouldn't start, so I replaced the spark plug. Now I can get it started if I duct tape the choke on, let it sit for 5-10 minutes, then plug the rope 30-40 times to before it will start! (I had to do the same thing last year to start it and keep it running) Then I have to keep the choke on for at least another 5-10 minutes before it will stay running. Once it's warmed up it runs fine and will restart.
Any ideas what could be wrong with it???