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Huge Savings Arco Marine Zeus A275l J-180 4" Alternator With Regulator #a275l-12-df4-ie-49k6 Quality Assured [Q5XkdfI3]

$45.99 $147.99 -69%

Download LiteratureARCO A275L-12-DF4-IE-49K6 AlternatorsZeus A275L J-180 4" Alternator with RegulatorThe highest power output alternator in its size/class. Features:Engineered for High Energy Production.Suitable for Marine, RV, Military, and Commerc

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Huge Savings Arco Marine Zeus A275l J-180 4" Alternator With Regulator #a275l-12-df4-ie-49k6 Quality Assured [Q5XkdfI3]

Download Literature

ARCO A275L-12-DF4-IE-49K6 Alternators

Zeus A275L J-180 4" Alternator with Regulator

The highest power output alternator in its size/class. 

Features:

  • Engineered for High Energy Production.
  • Suitable for Marine, RV, Military, and Commercial applications.
  • Rapidly charges large battery banks.
  • Coolest operating temperatures for increased performance. Runs 8 - 20% cooler than incumbent alternators due to:

   - Heat shedding coatings

   - Rectifier located on housing exterior

   - Dual cooling fans

   - OEM Components

  • It is optimized for performance at idle speeds.
  • Reduces the need for a generator by creating additional power with your engine.
  • Unleash peak performance with E-Coat/Cerakote. Our advanced coating absorbs less heat, keeping the A275L cooler. This translates to more amperage for sustained periods.
  • Use an ARCO Zeus Bluetooth alternator regulator for maximum performance or lithium battery charging.
  • SAE J1171 Certified.
  • Made in the U.S.A.

Technical Specifications:

  • Voltage - 12v
  • Field Type - P
  • Rotor Poles - 16
  • Stator Size - 138mm
  • Frame Size - Large
  • Weight - 14.9 lbs/6.7 kg
  • Regulation - Internal/External (Internally regulated with adaptor for optional external regulation.) 
  • Output Voltage - 14.1v (Default)
  • Finish - (Black) Cerakote or E-coating
  • Cut-In RPM - 1,061 Alternator RPM
  • Maximum Alt RPM - 19,000
  • Battery Post - M8 Thread Post, Side Mount
  • Standard Pulley - 49K6 (6-groove, 49mm)
  • Pulley Mount - 17mm diameter shaft, 25mm long, threaded M17 x 1.5
  • Pulley Hardware - M17 x 1.5 x 24mm nut, w/ 18mm ID x 29mm OD washer (Included)
  • Diodes - 6 positive, 6 negative, 50A Rated, Avalanche
  • Max Output (Cold, 9,000 RPM) - 311 Amps
  • Sustained Cruising Output (Hot, 6,000 RPM) - 227 Amps
  • Sustained Idle Output (Hot, 3,000 RPM) - 198 Amps
  • Max Continuous Operating Temperature - 110°C / 230°F

Mounting Application:

  • Replaces most Volvo Penta alternators using a 4” J180 saddle-style mount
This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.
Normalized SKU: A275L12DF4IE49K6
UPC Code: 695845877032

ARCO A275L-12-DF4-IE-49K6 Literature Download

Quick Reference Guide
Owners Manual

What Our Customers Say

January 17, 2026

Absolutely no complaints!

It's a very solid and well-built item. It feels very durable.

- Kalani G..

January 17, 2026

Absolutely no complaints!

It's a very well-designed and effective item. I'm a very happy user.

- Nick G..

January 17, 2026

Absolutely no complaints!

This product is a fantastic asset. I use it all the time.

- Leroy X..

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