Small Frame Diesel Alternator, 12 Volt, 120 Amp, 20028


Small Frame Diesel Alternator, 12 Volt, 120 Amp, 20028
SKU: 76809
Mfg# 20028
UNIT: Each
Description: Small Frame AlternatorRated Output: 120 ampVoltage: 12 volt
Typically Ships Out in 1-2 Business Days


Small Frame Alternator, Diesel Only, 12 volt, 120 amp, 20028.

  • 20028 (New 12 volt, 120 amp)
  • 10-DN Style Alternator for Marine Diesel Engines
  • Dual Mounting Foot
  • Non-Regulated
  • Isolated Ground
  • Fits most small Diesel engines including Yanmar, Perkins and others
  • Heavy Duty Diodes
  • External Voltage Regulator # VR-1200, not included

For Diesel Engine Applications Only, NOT ignition protected, NOT SAE J1171 compliant, NOT for gasoline engine use.
(SAE J1171 compliance specifically deals with external ignition protection of marine electrical devices in gasoline powered marine engines.)



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Sterndrive Engineering offers a one (1) year fault free warranty on rotating electrical parts (Starters, Alternators, Trim Motors) and a one (1) year Limited warranty on all other parts (solenoids, voltage regulators, water pumps, etc.). These warranties do not apply to any repairs, alterations, or work undertaken by third parties not involved in the actual manufacturing of the product.


  • Restocking charge will apply at a minimum of 10% for all product returned.
  • All Returns must be returned within 30 days of receipt of the items.
  • Some products are non-returnable, please contact us for further details.
  • Manufacturer defects reported within 30 days of receipt will be supplied a pre-paid label for return shipping upon approval.
  • Please contact Go2marine for Manufacture Defects, Returns and help with Warranties.