Volvo-Penta Sea Strainer PN: 21880386 / formerly 860631

[woodword]

Looking for this item for our AD-41B engine. Diameter is about 5 inches across the cap. The one I saw on eBay is too big. Thanks!

http://useddieselenginecenter.com/zeewaterfilter-21880386-volvo-penta

 

[Fun Times]

Searching your two numbers I ran across another number 21641712 and though somehow doubtful this place says it's in stock. http://www.boatpartguys.com/ocart/21641712

Also find the part number 21641712 & click on NSN for some other info, http://fsg-43-pumps-compressors.parttarget.com/centrifugals-separators-filters-21641712_2598357.html

I found the other number in here, http://www.volvopentapower.co.uk/products/21360-860631.aspx

Hope this turns out to be something in your favor, good luck.