Parts have been long gone for echo saws... Too bad as they were good saws.. My dad has had one for like 45 years. I remember the day he got it from the john deere dealer I was about 3 years old....
Any way echo made JD saws for years and you may find a cross reference through a john deere dealer. Usually best to find an older farm dealer. The lawn and garden dealers were never much help for me. I'm still running an 80 EV JD saw.(echo)..
