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Seasonal Pick Arco Marine Zeus A275l J-180 4" Alternator W/terminal Block Series [N7IHGrZy]

$74.99 $239.99 -69%

Zeus A275L J-180 4" Alternator with Terminal BlockThe 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

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Zeus A275L J-180 4" Alternator with Terminal Block

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.
  • It runs 8 - 20% cooler than incumbent alternators due to heat-shedding coatings, a refrigerator on the housing exterior, dual cooling fans, and 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 or lithium battery charging for maximum performance.
  • 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 - External Only (These units will come with a terminal block and a P-Type harness. They will only work with an external regulator, such as an ARCO Zeus Bluetooth alternator regulator.) 
  • 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

Manufacturer : ARCO Marine
Manufacturer Part No : 4022

What Our Customers Say

January 5, 2026

Absolutely no complaints!

I'm happy with this. And so very, very, very, very useful.

- Taryn X..

January 5, 2026

Absolutely no complaints!

The best money that I have ever spent in a while.

- Morfydd E..

January 5, 2026

Absolutely no complaints!

Great product. And it works very, very, very well.

- Cefin P..

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