So we closed on the house. But like all great things, it needs some work. The grass was about 3' tall in the back yard, well past my knees. So Wedensday night I hit the yard with Triasicide and every ant mound I could find with amdro. While going over the back yard I found a stump hidden by the grass. Thursday morning I got out the new $99.99 weed wacker, read throuh the instructions and made sure that I could wack the tough stuff right away. I didn't want to torch the small engine before it got broken in. The manuel said to run it at full speed when cutting grass, nothing about a break in period. I started easy, going round the driveway, doing a full throttle and letting it idle under no load, thinking that it would help "blow out" the break in material of the 2 cycle engine. About half way around the fenced in backyard I start hearing this rattle from the engine. I think to myself "Huh, that's a new noise." Then go back to work thinking that the rattle is just a loose screw or bolt in the plastic heat shielding. A few seconds the engine stops, and I cannot restart it. The smoke and smell coming from the heat shield smelled like a burned up clutch. "Uh oh!". I kept the recipt, but never got 1/2 way through my yard. I read the manuel, added the oil that came with it to the gas just as discribed in the manuel. And I still burned up something. Well, just to make sure I would have to use the return policy. I decided on Friday to give it another shot at the rest of the back yard. It started up fine, and ran for about 10 minutes. Then that rattle. I guess in a 22 cubic centimeter 2 stroke mower a knock sounds more like a rattle. "Their is that sound again." I thought. A few seconds later the thing stopped, and I couldent restart it again. Their was that same terrible smell. My dad has a similar machine, and his has lasted in a similar sized yard for 5 years now. I was kind of thinking about trading up, and adding a tiny bit of Pennsoil TWC-3 Synthetic Blend Marine 2 cycle oil to the mix that I already have, just to help with the "break in" of the tiny weed wacker. And seeing if that worked. I still dont understand how I burned something up. But perhaps it was the Chinese manufacture. So my question is. Should I go back and get another one? Or should I trade up to something else?