i took the zama carb apart....looks very clean, i blew it all out with an aircompressor, reassembled, and the same thing happens, so i put on a different carb, and the same thing happens, good low idle but nothing else, then it dawned on me that the fuel may be to rich, which i think it is, i had used the gas that the trimmer manual calls for, 4 oz of oil to 1 gallon of gas, i haven't tried it yet, but, does that seem like a logical reason for the problem? if it worked as a trimmer why won't it run now..hhhmmm...