ARCO Marine Zeus A225S 1"-2" Alternator w/Regulator

Enhance your marine vessel's electrical system with the Zeus A225S Alternator, designed specifically for demanding marine and boating applications. Delivering unparalleled power output in its class, the A225S ensures reliable performance and longevity, making it the perfect choice for your boat's energy needs.

Key Features

• High Energy Production: Engineered to deliver the highest power output in its size and class, ensuring your marine systems run smoothly.
• Versatile Applications: Ideal for marine, RV, military, and commercial use, providing flexibility across various demanding environments.
• Rapid Battery Charging: Capable of quickly charging large battery banks, minimizing downtime and maximizing efficiency.
• Superior Cooling Performance: Operates 8-20% cooler than standard alternators thanks to advanced cooling technologies, enhancing performance and lifespan.
• Advanced Heat Management:
  • Heat-shedding coatings
  • External rectifier placement
  • Dual cooling fans
• OEM Quality Components: Utilizes original equipment manufacturer parts for reliability and durability.
• Optimized for Idle Speeds: Maintains optimal performance even at low engine RPMs.
• Generator Reduction: Generates additional power from your engine, reducing the need for a separate generator.
• Enhanced Coating: Features E-Coat/Cerakote finishes that absorb less heat, allowing for sustained high amperage output.
• Smart Regulation: For maximum performance or lithium battery charging, pair with an ARCO Zeus Bluetooth alternator regulator.
• Certified Quality: SAE J1171 Certified, ensuring compliance with industry standards.
• Made in the USA: Proudly manufactured in the United States, supporting local industry and ensuring quality control.

Technical Specifications

Specification	Details
Voltage	12V
Field Type	P
Rotor Poles	16
Stator Size	130mm
Frame Size	Small
Weight	12lbs / 6.7kg
Regulation	Internal/External
Output Voltage	14.1V (default)
Finish	Black Cerakote or E-coating
Cut-In RPM	1,061 RPM
Maximum Alt RPM	19,000 RPM
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, with 18mm ID x 29mm OD washer (Included)
Diodes	6 positive, 6 negative, 50A Rated, Avalanche
Max Output (Cold, 9,000 RPM)	254 Amps
Sustained Cruising Output (Hot, 6,000 RPM)	187 Amps
Sustained Idle Output (Hot, 3,000 RPM)	157 Amps

Mounting Applications

• Compatible with most domestic styles, utilizing a single 1" or 2” mounting foot. Easily replaces alternators from brands like Motorola and Prestolite.

Why Choose the Zeus A225S Alternator?

The Zeus A225S is engineered to meet the rigorous demands of marine environments. Its robust construction and superior cooling mechanisms ensure consistent performance, even in the harshest conditions. Whether you're outfitting a fishing boat, yacht, or commercial vessel, the A225S provides the reliable power you need to keep your systems running efficiently.

Additional Resources

Important: This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.

• Owner's Manual (PDF)
• Brochure (PDF)

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.