Gotta Lawnboy with a Tecumseh engine that starts up real easy and runs fine. When I stop it to empty the bag, it will restart but only run for about a minute and sputters and dies and I can't restart till it cools down like the thing is vapor locked or something. I put a new air filter and it has clean gas I don't know what else to do, it's a puzzle. need a bit of help here 