I'm trying to help my son. He bought a used Honda mower for $75. It is a good mower. However, he was able to use it to mow his front yard. Moved to the back yard and the string broke when starting it. The cover to replace the string is riveted, making it difficult to replace the cord. Estimates to repair are $100. Is there an easy way to remove the rivets? Or is there anyone that could repair it interested in buying it? It has an electric start but that isn't working either, it seems to need a new battery for the electric start. Thanks.