New Mercruiser ALTERNATOR FITS OMC Volvo Marine Mando Crusader Marine 1987 1988 19. 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: 51 Amps Fan: External Regulator: Internal Grooves: 6 Source: Aftermarket