NEW ALTERNATOR 6 GROOVE PULLEY FITS MERCRUISER 5.0L 5.7L EFI LX 807652T 3857813 100% NEW and Made with the Highest Quality Components Available Full One Year Warranty Computer tested for consistent Quality and unsurpassed reliability Alternator - Voltage: 12V Amperage: 55 Amps Regulator: Internal Source: Aftermarket