Marine Alternator 50 Amp - Mercury 225HP 250HP Outboard 3.0L V6
New 50-amp 12-volt marine alternator for Mercury outboard engines rated at 225, 250, and 300 horsepower. Denso type with clockwise rotation, internal fan and voltage regulator, single-groove solid pulley, and 3:00 regulator clock position. Fits Mercury 225HP carbureted models 225CXL, 225CXXL, 225L, 225XL, and 225XXL from 1994-1999, Mercury 225HP EFI models from 1995-2000, Mercury 225CXL SeaPro from 1996-1998, all Mercury 250HP EFI models from 1995-2000, and Mercury 300 ProMax Racing from 1998-2000. Also compatible with Mariner 225 (Carb, EFI, Sea Pro) and Mariner 250 EFI. All equipped with the GM 3.0-liter V6 (183/185 cubic inch) powerhead. Replaces Mercury 821663, 821663-1, 821663-A1, Denso 101211-3020, 101211-3021, and API Marine 20300.
OEM PART NUMBERS:
• Mercury Marine: 821663, 821663-1, 821663-A1
• Nippondenso: 101211-3020, 101211-3021
• API Marine: 20300
SPECIFICATIONS:
• Voltage: 12V / Amperage: 50A
• Rotation: CW (Clockwise)
• Unit Type: Denso / Fan: Internal / Regulator: Internal
• Pulley Grooves: 1 (Solid) / Clock: 3:00
• Polarity: Negative / Output Stud: M6-1.0
• Weight: 10 lbs / 4.53 kg
APPLICATIONS:
• Mercury 225CXL/CXXL/L/XL/XXL Carb (1994-1999)
• Mercury 225CXL/CXXL/L/XL/XXL EFI (1995-2000)
• Mercury 225CXL SeaPro (1996-1998)
• Mercury 250CXL/CXXL/XL/XXL EFI (1995-2000)
• Mercury 300CL/CXL/L/XL ProMax Racing (1998-2000)
⚠️ Verify OEM part number from your original unit before ordering to ensure proper fitment.
WARNING: 