Although you will not find it listed separately at CMS or DS, it can be ordered from Honda as the same seal is used in a variety of Honda products. The pn is: 16997-467-000. It wil cost 3-4 bucks. Dimensions are: 11.8X3.55 mm. Forget about Amazon, Walmart and all the other slave factories that are making a killing right now. These are the times to support a Honda (marine) dealer.