API Small Frame Alternator, Diesel Only

$152.31 to $184.29

$152.31 to $184.29
  • 20044 (New 12 volt, 78 amp)
  • 20045 (New 24 volt, 50 amp)
  • 10-SI Style Alternator
  • 2" Mounting Foot
  • 1-Wire Hook-Up w/ Tachometer Terminal for Marine Diesel Engines
  • 20044-3W is a 3 wire hook-up for faster cut in
  • 2" pulley w/ 1/2" belt fits older Perkins 4 & 6 cyl.
  • 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.)
Item #
Small Frame Alternator, 12 Volt, 78 Amp, 20044-3W
Item #:560791-78AMPS-12Volt
Small Frame Alternator, 24 Volt, 50 Amp, 20045
Item #:560791-50AMPS-24Volt

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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.