DANFOSS / EATON-O RING

Cross-referencing against your motor's service manual is really the safest path here. The part number 16015-53 is the supplier's own MPN, so if you can pull up the service documentation for your specific Char-Lynn assembly and match it there, you'll know for certain it's the right fit. These o-rings come in a variety of sizes across the product line, so confirming the number before ordering saves you the hassle of a return.