After using my newly purchased Poulonpro chainsaw model P4018WT, for about 20 minutes, I stopped to check the fuel, but then could not restart it. Menards advised me that I had to have it serviced. I was told that it was clogged with saw dust. Why would a new saw clog up this quickly? Is this a manufacturer's defect? I was usingit to cut the tops off of four inch fence posts.