This saw has less then one hour on it. During its first use, ten minutes or so, the saw chain came off and damaged it to the point I had to replace it. (I'm sure it was properly tensioned.) After replacing the chain, I used it today and again, within a few minutes, the new one came off, damaging it where it will not fit into the bar. I did talk to Echo and they said the saw chain is not covered under warranty. Any help would be appreciated.