Loaned it out and it never ran since. It will start up with the high idle then once you try to cut or hit the gas a little to slow down the idle it will just stall right out. It will run forever as long as you are holding the gas down. I cleaned out the cap and it seemed to work. Then put the saw away (was tired from trying to start it for hours) and next time I went to use it I have the same problem. I replaced the fuel filter and plug to no avail. Any help appreciated. Its a poulan 20" , I forget the model.