Just a heads up in case this happens to you. I was on my second tank of gas on my EB8000 and all of a sudden It felt like the blower was rocking on my back. Put it down and saw that the back rest came apart form the main machine. I was only a few blocks from the dealer I bought it from but was in the middle of a big leaf job. I took it to them. They dropped what they were doing and started to look things over. It seems that the main bolt that holds the two pieces together vibrated loose. It wasn't a quick fix. The blower had to be taken apart to get at where the nut had been located. They told me to come back in an hour. I went back to my job. Did my mulching and than went back and picked up the blower. Glad I bought it form a dealer with warranty support.