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Automobile and Marine Alternators

The automobile version of the 23HD series alternators are made of standard aluminum and are designed and tested to withstand higher under-hood temperatures, and are for vehicles requiring higher output at idle and at highway speeds. This series of alternators is ideal for small engine and car audio applications.

The marine ignition protected 23HD series alternators are powder-coated for a long-lasting, corrosion-resistant finish. Alternators with spindle mounts are available in 3/8", 7/16", and 1/2" mounting bolts, as well as dual-foot mounts in 8mm and 10mm mounting bolts.



  • All GM automobiles 1960 - 1985 and Ford 1960 - 1985.
  • For marine applications, Yanmar, Perkins, Westerbeke, and
    Universal diesel engines.
  • For more application information call HDPSI at
    (800) 443-9394 or go to
    on the web for details.


  • Weight: 12 lbs.


  • 12-month limited warranty


  • Mount types available: 1” and 2” spindle and dual-foot
  • Rated at 120 amps, 12 volts
  • Heavy-duty press fit, 50-amp diodes
  • Uses standard (10-170) or three-step (10-215) external regulators
  • POWERLINE custom-braided wiring harness available
  • 5/16” positive and negative output terminals
  • Hand-wound, high-output stator
  • Heavy-duty, dual-plane balanced rotor
  • Heavy-duty, high-speed bearings with high-temperature grease
  • Long-life brushes
  • Marine models comply with US Coast Guard Title 33 CFR 183.410 (Diesel engine applications only)
  • Marine ignition-protected models certify to SAE J1171 standards
    (Gasoline engine applications only) (UL Marine listed)
  • Shipped with clockwise directional fan
  • Bi-directional fans available
  • Various pulleys to fit your application


  • Extensive heat-chamber testing to withstand the higher
    under-hood and engine compartment temperatures of
    heavy-duty applications
  • Designed for worst-case, high-temperature operating conditions
  • Aluminum and powder-coat finishes available
  • Sized right to allow a “bolt-to-bolt” exchange in most cases
  • Heavy-duty materials provide exceptional performance
    for extended life
  • Troubleshooting Guide and on-call technical support available

POWERLINE 23HD Series Alternator Power Curve Performance

23HD Series, 100-Amp, 12-Volt
Click graph to enlarge.
23HD Series, 120-Amp, 12-Volt
Click graph to enlarge.
POWERLINE 23HD Series Alternator Spindle and Saddle Mount

23HD Series, Spindle Mount
Click illustration to enlarge.
23HD Series, Saddle Mount
Click illustration to enlarge.
  HD Power Solutions Inc • 4616 Fairlane Ave • Fort Worth, TX 76119 • Phone: (817) 535-0284 • Fax: (817) 531-2755