This is a Brand New Alternator for Crusader, Mercruiser, OMC, and Pleasurecraft Internal Regulator Self Exciting Regulator 1 Wire Hook-Up With Screens + Single Pulley Also Available In Chrome CROSS REFERENCE MERCURY SIERRA ARCO 56045 59755 69729 78403A1 18-5656 reman - 18-5950 reman - 20102 HO - 60122. NOTE: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 OEM(s): Delco Alternator Family: Delco 10SI Voltage: 12 Volts Amps: 100 Amps Polarity: Negative Alternator Family Type: 110 Output Stud Dimensions: 12-24

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