This 1-wire 12V alternator is designed as a direct replacement for a wide range of MerCruiser marine engines, including 120, 198, 215, 228, 233, 255, and 270 HP models. Built to OEM specifications, it ensures reliable charging and consistent electrical performance in demanding marine conditions.

Product Features:

• Voltage: 12V

• Amperage: 42A

• Rotation: Clockwise (CW)

• Regulator: Internal (IR)

• Fan Type: External (EF)

• Pulley Type: V-Belt (V1)

• 1-wire hookup for easy installation

Compatible With / Replaces OEM Part Numbers:

• AC Delco: 321-621

• API Marine: 20051, 20054, ALT50, ALT51

• ARCO Marine: 20102, 20103

• Arrowhead: 400-12007, ADR0105

• Delco Remy: 1100576, 1100577, 1100619, 1100654, 1100666, 1100721, 1100722, 1100732, 1100806, 1100894, 1100912, 1100914, 1100915, 1102393, 1102496

• Dixie: MA-100, MA-101

• EMP Parts: 4-5956

• Barsanco: 110-7127MAR

• Cargo: 111250

• Caterpillar: 655381

• Family: 10DN, 10SI