CDI M.E.D.S. Upgrade 531-0118MMP to Add Yamaha Product Description Marine Engine Diagnostic System M.E.D.S. Yamaha Add-On Adds Compatibility with Select Yamaha Engines, Yamaha PWCs and Mercury Engines built by Yamaha This part is for use with your current M.E.D.S. system to add Yamaha capability It includes a software upgrade to the latest version. Replaces 531-0119Y California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Google Product Type Special Tools Wis