ARCO Marine Zeus A275L Vortec Alternator w/Regulator

The Zeus A275L Vortec Alternator with Regulator is engineered to deliver exceptional power and reliability tailored for marine and boating applications. With its superior energy output and advanced cooling technologies, this alternator ensures your vessel's electrical system runs efficiently, even in the most demanding conditions.

Features

• Engineered for high energy production, providing the highest power output in its size/class.
• Ideal for Marine, RV, Military, and Commercial applications.
• Rapidly charges large battery banks, reducing downtime.
• Maintains the coolest operating temperatures for enhanced performance.
• 8-20% cooler operation compared to standard alternators thanks to:
  • Heat-shedding coatings
  • Rectifier located on housing exterior
  • Dual cooling fans
  • OEM Components
• Optimized performance at idle speeds, ensuring consistent power.
• Reduces reliance on generators by generating additional power through your engine.
• Advanced E-Coat/Cerakote finish absorbs less heat, keeping the alternator cooler for sustained amperage.
• Compatible with ARCO Zeus Bluetooth alternator regulators and lithium battery charging for maximum performance.
• SAE J1171 Certified for quality and reliability.
• Manufactured in the U.S.A., ensuring top-notch craftsmanship.

Technical Specifications

Specification	Details
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, with 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

• Compatible with Mando-type alternators using Vortec/GM pad mounting feet.
• Fits numerous Mercruiser and Volvo Penta marine engines, including:
  • 3.0GLM
  • 3.0GLP
  • 4.3GXi
  • 5.7GiL
  • 5.7GXiL
• Fits GM Block engines commonly found in marine applications.

Download the Quick Guide (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.