ARCO Marine Zeus A225S J-180 3.15" Alternator w/Regulator

The Zeus A225S J-180 3.15" Alternator with Regulator is engineered to deliver unparalleled power performance for marine and boating applications. Designed to meet the demanding energy requirements of your vessel, this alternator ensures reliable and efficient power generation, keeping your onboard systems running smoothly.

Key Features

• High Energy Production: Engineered for maximum power output in its size and class.
• Versatile Applications: Perfect for marine, RV, military, and commercial use.
• Fast Charging: Rapidly charges large battery banks to keep your systems operational.
• Advanced Cooling: Operates 8-20% cooler than standard alternators, enhancing performance and longevity.
• Heat Shedding Coatings: Minimizes heat buildup for optimal efficiency.
• Exterior Rectifier: Located on the housing exterior for better heat dissipation.
• Dual Cooling Fans: Ensures consistent cooling under various operating conditions.
• OEM Components: Utilizes original equipment manufacturer parts for reliability.
• Optimized Idle Performance: Maintains high performance even at engine idle speeds.
• Generator Alternative: Reduces the need for a separate generator by providing additional power through your engine.
• E-Coat/Cerakote Finish: Advanced coatings absorb less heat, allowing for higher amperage output over sustained periods.
• Bluetooth Regulator Compatibility: For enhanced performance and lithium battery charging, pair with an ARCO Zeus Bluetooth alternator regulator.
• SAE J1171 Certified: Meets industry standards for quality and performance.
• Made in the U.S.A.: Proudly manufactured domestically for quality assurance.

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 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, 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 small case styles utilizing a 3.15” J180 saddle style mount, including brands like Hitachi, Lucas, Mitsubishi, and most Yanmars.

Note: 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.