ARCO Marine Zeus A275L Vortec Alternator, 12V

The ARCO Marine Zeus A275L is a high-output 12V alternator engineered for marine, RV, military, and commercial applications. Optimized for performance at idle speeds, this unit features advanced E-Coat/Cerakote finishes to manage heat, allowing for cooler operation and sustained high amperage output.

Key Features:

• Designed to charge large battery banks efficiently, reducing the need for a separate generator.
• Operates 8% to 20% cooler than standard alternators through heat-shedding coatings, an externally mounted rectifier, and dual cooling fans.
• Regulation: External regulation required (includes terminal block and P-Type harness; compatible with ARCO Zeus Bluetooth regulators).
• Construction: 16 rotor poles, 138mm stator, and durable E-Coat/Cerakote finish.
• Performance: Max output of 311 Amps (cold, 9,000 RPM) and sustained idle output of 198 Amps (hot, 3,000 RPM).
• Compliance: SAE J1171 certified.
• Manufacturing: Made in the U.S.A.

Mounting and Compatibility:

• Designed to replace Mando-type alternators with Vortec/GM pad mounting feet, commonly found on GM-block marine engines including Mercruiser and Volvo Penta 3.0GLM, 3.0GLP, 4.3GXi, 5.7GiL, and 5.7GXiL.
• Pulley details: Includes 49K6 6-groove pulley, 17mm shaft, and mounting hardware.
• Weight: 14.9 lbs.
• Manufacturer Part Number: 4033.