Just bought this last year. Only used about 6 times. Did not store it properly in the winter, but just changed the gas out, new spark pug and fuel filter. Air filter carb, and muffler area pretty clean. Idles fine , but I go to give it gas, it bogs down . I can throttle about half way if I do it slowly then it wants to bog down Is my gas mixture too rich? This machine should have some major power right?