New 100 Amp Delco Universal Marine Alternator 56045, 59755, Fits many Models, Please See Below New Aftermarket Part (Not Rebuilt/Refurbished/Repurposed) OEM(s): Delco Alternator Family: Delco 10SI Voltage: 12 Volts Amps: 100 Amps Polarity: Negative Alternator Family Type: 110 Output Stud Dimensions: 12-24 Approximate Weight: 11.781 lbs / 5.35 kg Notes: 1-Wire System, Marine Unit, V Groove Pulley Replaces: AC DELCO 321-621 ARCO MARINE 20102 DELCO 1100576, 1100577, 1100894, 1100912, 1100914, 1100915, 1102393, 1102496 MERCURY MARINE 56045, 59755, 69729 OMC 983424, 983836, 988247 Please verify this is the right part number before ordering