I may have 10 or 12 hours use on it so far, and yesterday it seemed like it was not putting out as much asir volume as it used to. Today it started to produce even less volume and speed of air, and had a hard time just blowing osme pine cones and light stuff on the ground, where before I could get a big ball of pinestraw rolling without even using full throttle. It acts like the motor is lugged down like its getting too much fuel but its not smoking, but it sure does not want to rev up or produce power. I thought perhaps a load of bad gas but my chainsaws are working fine with the same batch of gas. I did try a fresh batch (Chevron Premium) and Stihl 50:1 oil and no difference. I emp[tied the fuel tank ran it completely dry, refilled it after checking filter etc all seems fine, but it still refuses to work right. Cranks up easy though. I can;'t really tear it apart as its under warranty, so I carried it in to the dealer. He told me no telling when I can get it back to you as they are swamped with generator and chainsaw repairs and it more than likely will be next week some time......duh! Oh well I can live a lot easier with a property that just needs some blowing done around it , better than folks can live without power or with trees on their house and cars, so its not a big deal. I am surprised though that this Stihl gave up so quick and with not a lot of use. You could not hold your hand over the discharge chute before, now its not a problem. Be interesting to see what they find wrong with it. I have a feeling its in the fuel system somewhere.