I own the exact same saw except that my saw is a John Deere 50V, a bright yellow saw, which is a re-branded Echo CS-452VL. Back about 15 or more years ago I contacted Echo to try to find a service manual for my saw and they were kind enough to mail me a photocopy of the CS-351VL, CS-451VL and CS-452VL Service Manual plus a parts list for the Echo CS-452VL saw. In recent years I scanned the photocopied pages and I have uploaded the file as a PDF file, 15MB in size, to ZippyShare. You must understand that the manual was scanned from photocopied pages so the quality is not the best but a service manual probably cannot be found elsewhere. If you want a copy you can download it from ZippyShare here: http://www2.zippyshare.com/v/69542358/file.html
Tried to download, just got a 351 or JD 40V. File no longer available. Can I find this file somewhere else?
Thanks,
Lee
I haven't been on the site for a while but I uploaded the file again on Zippyshare. Over a period of time if there is no download activity, Zippyshare deletes the file. This upload should last for about 30 days:
http://www27.zippyshare.com/v/7247470/file.html