Alright, so i've been reading Lawnsite for quite some time now and am still in a learning process. I recently purchased my equipment, all commercial grade stuff. My question is this, the weed trimmer and edger both make a very loud metal on metal sound that is something I have never heard in any of my previous residential grade stuff. I've got an FC50 - edger and the FS80r - trimmer. Is this common place? have I done something wrong in the startup/storage/gas mixture? or do I just need to get used to this sound? For the record, I have started them once. When I picked them up they did all the setup on them in the back, I loaded my truck and was on my way (I was already late for my regular job that morning). I started them last weekend and because of the noice, I didn't run them very long so I don't know if the noise would have gone away or not. Any advice?