Walbro's web site sucks at best. But if you go there and click on 'service' you can follow links to a search engine for manufacture's parts based on either Walbro or manf part numbers. Nothing came up for WMV. Fwiw, Walbro pumps have 4 digit numbers. Don't know about carbs. Mercury is not listed as an engine that uses Walbro.<br /><br /> http://www.walbro.com/
