MerCruiser 78403A2 Alternator 37 Amp 12V Motorola 120hp 140hp 4cyl 3.0L 1979-89

Part Number(s) Included

• Manufacturer Motorola
  • Stamped Part Number
    • 8MR2024F / 8MR2023F
  • Rated Amperage 37 Amp
  • 12V / 37 amp / Internal Regulator / 2-inch mounting foot

Equivalent Part Numbers

• MerCruiser
  • 78403A2
• Sierra 18-5957 & 18-5966

General Application / Compatibility

• Found on various mid-80's MerCruiser 4cyl & some BBC 454 models
• Please check with your parts manual to ensure the indicated part number matches as each alternator is specific to it's surround electrical system
• There should be a stamped number somewhere on your alternator.

Related Engines

• GM 2.5L 4cyl 120hp
• GM 3.0L 4cyl 140hp
• GM 7.4L 454 V8
• ....and possibly others

Other Details

• Freshwater Used Parts
• You get the alternator pictured
• All of our Sterndrive / Marine Alternators are professionally tested at a local starter / alternator place
• Overall Good Condition!

Purchase with confidence!

1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989