The machine starts fine but when you give it gas, it will die. After I continue to start it attempting to get it to run, it will after several starts run fine. Then after using it for 15 minutes or so, during which time it runs fine, the same problem will emerge after I shut it down and restart it. I've rebuilt the carb, replaced the fuel filter, and made sure the flame arrestor screen is clean, all to no avail. The unit has about 60 hours on it and this has been happening for some time but seems to be getting worse.