ARCO Marine Zeus A275L J180 4-Inch Alternator with Isolated Ground and Terminal Block

Zeus A275L J180 4 Alternator with Isolated Ground 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.


• Heat shedding coatings


• Rectifier located on housing exterior


• Dual cooling fans


• OEM components


• 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, keeping the A275L cooler for sustained amperage output.


• Use the ARCO Zeus Bluetooth Alternator Regulator for maximum performance or lithium battery charging.


• SAE J1171 Certified.


• Models available with internal/external voltage regulator.


• Proudly 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 - 110C / 230F

Mounting Applications:

• Replaces most Volvo Penta alternators using a 4 J180 saddle-style mount

The ARCO Marine Zeus A275L J180 4-inch alternator is engineered to deliver the highest power output within its class and size. Designed for marine, RV, military, and commercial applications, it efficiently charges large battery banks while maintaining cool operating temperatures for enhanced performance. Its heat shedding coatings and exterior-mounted rectifier enable reliable operation under demanding conditions, ensuring maximum durability and longevity. The dual cooling fans further optimize thermal management, allowing the alternator to operate at peak efficiency even during extended use. Built with OEM components and certified to SAE J1171 standards, this alternator guarantees quality and safety for critical applications.

Features:

• High energy production designed for demanding applications

• Suitable for marine, RV, military, and commercial use

• Rapidly charges large battery banks to ensure power availability

• Heat shedding coatings and Cerakote/E-coating for cooler operation

• Exterior-mounted rectifier for improved heat dissipation

• Dual cooling fans for enhanced thermal management

• Optimized for performance at idle speeds to reduce engine load

• Creates additional power, reducing reliance on generators

• Compatible with ARCO Zeus Bluetooth Alternator Regulator for advanced control

• Internally or externally regulated options available

• Made in the U.S.A. with high-quality OEM components