ALTERNATOR FITS DETROIT DIESEL MARINE INBOARD 8.2 8CYL 500CI 10479929 10497083 3909981 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: 105 Amps Fan: External Regulator: Internal Source: Aftermarket