I bought a new 8 hp giant-vac whisper jet push blower a couple weeks ago. We used it for a couple days and than one day I went to start it and the impeller was rubing agianst the houseing so I brought it back to my dealer and he said "oh man I thought they fixed that this year". So anyway he was cool about it and fixed it. I think he said that the whole engine was moving up and thats why the impeller was rubing. Anyway I just thought I'd share that incase anyone else is having a simular problem.