CDI 531-0119M M.E.D.S. Diagnostic System Upgrade to Mercury
CDI 531-0119M M.E.D.S. Diagnostic System Upgrade to Mercury, CDI M.E.D.S. (Upgrade 531-0118Y to Mercury Ver. 3.0)Product Description: M.E.D.S. Mercury Add On; Adds Compatibility with Select Mercury & Mercruiser Engines; Replaces: 531-0119M;