This is a New Genuine OEM Echo clutch drum used on some CS-590, CS-600, and CS-620 chainsaws. Part number A556001610. 

This clutch drum uses a 3/8 rim sprocket which can be purchased here: 262602741787 or a set of 2 here: 252520102706.

Looking for the solid clutch drum that does NOT have a replaceable sprocket? Check out this listing: 252796901568.

Alternatively, do you wish to convert your saw to .325 pitch chain? Just pair this clutch drum with this .325 rim sprocket: 264169804703.

We are an Authorized Echo dealer and work on all small engines so if you have any questions about fitment for your particular application or engine please contact us and we will be happy to answer. Please have your make and model information ready. 

Nolts Power Equipment (Formerly Perry Power Equipment) is located at 3720 Shermans Valley Rd, Loysville PA 17047. We are your source for Lawn & Garden Sales and Service -  click here to learn more about us and to see my other items on Ebay.

Return: 
If you are not satisfied with our items and want to return to us, please initiate a Return Request through eBay.  If the item was ordered by mistake, all original shipping charges will be subtracted from the refund amount.