Keep your marine generator sets and inboard engines running strong with this 12V, 51-amp alternator, designed to fit a wide range of Westerbeke models. Built to the 8MA/8MH/8MR family standard, this alternator features an internal voltage regulator and an external fan for reliable, efficient charging performance. With negative polarity and a B+ terminal, it integrates seamlessly into compatible electrical systems. This alternator is compatible with numerous Westerbeke generator sets and marine inboard engines, including the 10.0 BTG, 12.0 BTG, 12.0 WMF, 12.0 WTA, 11.0 TWG, 108B Six, and 108C Six models spanning model years from the early 1980s through the mid-2000s. Whether you are replacing a worn-out unit or upgrading your vessel's charging system, this alternator delivers dependable output to keep your onboard systems powered. Always verify compatibility with your specific engine model and year before ordering.