This is a Redmax Recoil Rewind Starter Spring Part Number 504115001.

This replaces the following part numbers:

185075130
504115001
516541701

This was used on a variety of units, and fits BCZ2400S.

We have access to many more Redmax parts, so if you can't find what you are looking for, please feel free to contact us to see if we can list it for you.

Please let us know if you have any further questions!