Alternator for Marine Applications Replaces Prestolite
Alternator for Marine Applications Replaces Prestolite
Alternator for Marine Applications Replaces Prestolite
Alternator for Marine Applications Replaces Prestolite
Alternator for Marine Applications Replaces Prestolite
Alternator for Marine Applications Replaces Prestolite
Alternator for Marine Applications Replaces Prestolite

Alternator for Marine Applications Replaces Prestolite

Item #: 400-20012

30-DAY RETURN POLICY

If your order arrives and it’s not exactly what you want, you may return it within 30 days for a refund. We know that people sometimes order a part and then discover it’s not exactly the one they need for the repair. We understand and want to work with you. Just make sure the item is in its original packaging and in good condition free of damage.

When a returned product comes back to us, we’ll check it over to make sure it’s in ‘Like New’ condition and free from damage such as dents, scratches, cracks, abuse, defacement or indication of removed screws/fasteners or seals. Return processing may take up to 5 business days from the time your product is received by DB Electrical.

To return a product, simply click here to start the process.

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DB Electrical marine alternators excel for powering watercrafts.
  • Built to Beat the Heat: High temperature epoxy and high temperature grease withstand extreme heat
  • Heavy-duty rectifiers and high-quality regulators enhance superior charging performance
  • Plated fans, pulleys and hardware protect against rust-producing dampness
  • Marine alternators meet SAEJ1171 certification for use on boats and jet skis
  • Factory direct, money-saving alternator typically priced substantially less than OEM counterparts
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  • Product Info
  • Applications List
  • Part Replacement List
  • Policy Information
  • Reviews

Overview

DB Electrical Alternators
DB Electrical keeps watercrafts moving forward with quality aftermarket alternators. We work directly with factories to ensure each component is manufactured to our exacting quality control standards. But because there is no middleman, we can offer these exceptional-quality electrical components at low factory direct prices.

With DB Electrical alternators, you’ll get …

  • Superior Quality Every Time – Our aftermarket alternators deliver performance that’s equivalent to the original.
  • Direct-Fit OEM Replacement Parts – DB Electrical aftermarket alternators are designed for perfect fitment to replace the ones that originally came with your vehicle.
  • Engineer-Tested Excellence – Our alternators go through a rigorous testing program to ensure optimal performance. Most alternators are supplied with their final test results and performance curve.

Reasons to choose DB Electrical for your next alternator:

  • Built to Take the Heat – Most DB Electrical alternators offer high-temperature epoxy, heavy-duty rectifiers, high-quality regulators, top-quality bearings and high-temperature grease for better charging and longer life under high-heat environments.
  • Corrosion Resistance – Plated fans, pulleys and hardware offer protection against rust-producing dampness.
  • Flame Arrestor Screens – Where applicable, alternators come with these screens to meet Marine SAEJ1171 Certification as laid out by the SAE.
  • Brand New Alternator – Never settle for a secondhand one. Many places will try to sell you a used alternator for about the price we’ll sell you a new one.

The DB Electrical Advantage – 1-Year Warranty
DB Electrical delivers exceptional value for products that we stand behind with our total-confidence 1-year warranty. Yes, you have a full year to make sure your alternator meets your expectations.

Item Number: 400-20012

100% Brand New Aftermarket Part From DB Electrical

Product Specs

Critical Note
Item ConditionAftermarket Part
Part TypeUNIT
Voltage12
RotationCW
RegulatorIR
FitsMARINE APPICATIONS
Delco 10SI Style Conversion Unit to Replace Prestolite and OMC units

Applications List

Select Make & Type
MAKE TYPE MODEL YEAR ENGINE
OMCEngine - Marine1001972
OMCEngine - Marine1001973
OMCEngine - Marine1201967
OMCEngine - Marine1201968
OMCEngine - Marine1201969
OMCEngine - Marine1201970
OMCEngine - Marine1201971
OMCEngine - Marine1201972
OMCEngine - Marine1201973
OMCEngine - Marine1201974
OMCEngine - Marine1201975
OMCEngine - Marine1201976
OMCEngine - Marine1201977
OMCEngine - Marine1201978
OMCEngine - Marine1201979
OMCEngine - Marine1201980
OMCEngine - Marine1201981
OMCEngine - Marine1401973
OMCEngine - Marine1401974
OMCEngine - Marine1401975
OMCEngine - Marine1401976
OMCEngine - Marine1401977
OMCEngine - Marine1401978
OMCEngine - Marine1401979
OMCEngine - Marine1401980
OMCEngine - Marine1401981
OMCEngine - Marine1551967
OMCEngine - Marine1551968
OMCEngine - Marine1551969
OMCEngine - Marine1551970
OMCEngine1551971
OMCEngine - Marine1551971
OMCEngine1551972
OMCEngine - Marine1551972
OMCEngine1551973
OMCEngine1551974
OMCEngine - Marine1651972
OMCEngine - Marine1651973
OMCEngine - Marine1651974
OMCEngine - Marine1651975
OMCEngine - Marine1651976
OMCEngine - Marine1701974
OMCEngine - Marine1751975
OMCEngine - Marine1751976
OMCEngine - Marine1751977
OMCEngine - Marine1851967
OMCEngine - Marine1851968
OMCEngine - Marine1851978
OMCEngine - Marine1851979
OMCEngine - Marine1851980
OMCEngine - Marine1901974
OMCEngine - Marine1901975
OMCEngine - Marine1901976
OMCEngine - Marine1901977
OMCEngine - Marine2001967
OMCEngine - Marine2001968
OMCEngine - Marine2001979
OMCEngine - Marine2001981
OMCEngine - Marine2101967
OMCEngine - Marine2101968
OMCEngine - Marine2101969
OMCEngine - Marine2101970
OMCEngine - Marine2151971
OMCEngine - Marine2251972
OMCEngine - Marine2251973
OMCEngine - Marine2251974
OMCEngine - Marine2251975
OMCEngine - Marine2251976
OMCEngine - Marine2251978
OMCEngine - Marine2301979
OMCEngine - Marine2301980
OMCEngine - Marine2301981
OMCEngine - Marine2351971
OMCEngine - Marine2351975
OMCEngine - Marine2351976
OMCEngine - Marine2351977
OMCEngine - Marine2401978
OMCEngine - Marine2451972
OMCEngine - Marine2451973
OMCEngine - Marine2451974
OMCEngine - Marine2451975
OMCEngine - Marine2501979
OMCEngine - Marine2601979
OMCEngine - Marine2601980
OMCEngine - Marine2601981
OMCEngine - Marine5.0L1980305cu in 5.0L 8 cyl
OMCEngine - Marine5.0L1981305cu in 5.0L 8 cyl
OMCEngine - Marine5.7L1980350cu in 5.7L 8 cyl
OMCEngine - Marine5.7L1981350cu in 5.7L 8 cyl
OMCEngine - Marine7.4L1980454cu in 7.4L 8 cyl
OMCEngine - Marine7.4L1981454cu in 7.4L 8 cyl
OMCEngine - Marine801967
OMCEngine - Marine801968
OMCEngine - Marine801969
OMCEngine - Marine901970
OMCEngine - Marine901971

Replaces These Part Numbers

ANDRE NIERMANN0247271
API MARINE20030, 20031, ALT30
ARCO MARINE40152
ARROWHEADADR0120, 400-20012
BARSANCO140-7317
DIXIEMA-505
EMS7320N
J&N Electrical Products400-20003R
LESTER7315, 7317, 7320, 8901
MES MOTORCYCLE & MARINE3140M-D, 7315, 7317, 8901
OMC381166, 381519, 383433, 383443, 384233, 981186, 981187, 985964
PRESTOLITE51-271, 51-284, ALK5206, ALK6207, ALK6210, ALK6210A, ALK6222, ALK6222A, ALK6222AY, ALK6222AYS, ALK6222Y
SIERRA MARINE18-5964
WAI1-2834
WILSON90-06-1020M

Frequently Asked Questions

Q: Do I need a larger charge wire for a High Output unit?
A: The high amp unit will operate better than stock, but not to its full potential without a larger charge wire. It’s the same reason firetrucks do not use garden hoses. It is IMPARATIVE to have proper charge and ground cables.

Q: Does a High Amp unit cause any damage to my battery or my vehicles charging system?
A: As long as it is installed properly with battery in good condition, then no. A High Output unit works exactly like a factory unit and only produces what is being demanded. No alternator works continuously at full output. Higher amperage is not bad and will not hurt a battery, but high voltage will blow one up.

Q: Will aftermarket underdrive pulleys (crankshaft power pulley) have any effect on my alternator?
A: Yes, underdrive crankshaft pulleys slow all the components (power steering, a/c, and alternator) to provide more power to the rear wheels. In some cases, the charging systems will fall totally on the battery at idle and completely stop charging.

Q: Where is the best place to get a voltage reading of the alternator output?
A: You’ll get the most accurate voltage reading from the back of the alternator at the main charge post that runs directly to the battery. This must be done while the vehicle is running.

Q: Why is the pulley on a high amp alternator smaller than my stock pulley?
A: The smaller pulley advances the power curve of the alternator just slightly, which produces a little more amperage around the idle if needed.

Q: Will I need a smaller belt for my high amp unit?
A: This varies by application because not all belts and belt tensioners are in the same condition. The tensioner will always tell you if you need a new belt or not. If it’s in range, you will not. If it is out, you will. Generally, you will need a belt that is one inch shorter than stock. You should have no problem finding a replacement wherever you buy your parts. V belt applications simply re-adjust your belt tensions to 3/8” deflection.

Q: What is the difference between a one wire, self-exciting and a self-energizing regulator?
A: Nothing. They are all exactly the same. Different manufacturers use different terms for marketing. The only wire to hook up is the charge wire to the battery. This does require modification for the alternator charge light on the dash.

Q: My stock unit used a five-groove pulley, and you sent my high amp alternator with a 6 groove. Why and what can I do?
A: 5 groove overdrive pullies are not produced. Install the belt on the back groove of the pulley closest to the fan or body of the alternator. The fan is internal, and this application will work just fine.

Q: Can your alternator be run in dual or triple alternator applications?
A: Yes. When wired and mounted correctly, the alternator can run in either dual or triple applications.

Q: Will I need a new battery with a high amp alternator?
A: If your battery is in good condition, and in spec of its OEM rating, then no. Your battery should work equally well with either the OEM and a High Amp unit.

Customer Reviews

WARNING: California’s Proposition 65

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