ARCO Marine Zeus A275L 3.15 Alternator with Isolated Ground and Terminal Block

Zeus A275L 3.15 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 Application:

• Replaces most small case styles using a 3.15 saddle style mount (e.g., Hitachi, Lucas, Mitsubishi). Most Yanmars. Requires Standard single V belt upgrading to a Serpentine System

The ARCO Marine Zeus A275L 3.15 Alternator is engineered to deliver the highest power output in its class, making it an ideal choice for demanding marine, RV, military, and commercial applications. This alternator features a robust design with advanced cooling solutions, including dual fans and heat shedding coatings, ensuring optimal operating temperatures for sustained high performance. Its exterior-mounted rectifier and durable Cerakote or E-coating finish contribute to enhanced longevity and reliability in harsh environments. Designed to rapidly charge large battery banks, the A275L reduces dependence on generators by efficiently harnessing engine power to generate additional electrical energy. Its optimized performance at idle speeds ensures consistent power delivery, while the inclusion of OEM components guarantees quality and compatibility. The alternator's internal or external voltage regulation options, combined with the optional ARCO Zeus Bluetooth Alternator Regulator, provide flexible control for maximum performance and lithium battery compatibility. Certified under SAE J1171 standards, this alternator is built in the USA, reflecting high manufacturing standards and quality assurance. The model features a large frame size with a 138mm stator and rotor with 16 poles, designed for high amperage output. Its 14.9-pound weight and standard 6-groove pulley make installation straightforward, with compatibility for most small case styles that use a 3.15 saddle mount, including Yanmar and common marine alternators. The ARCO Zeus A275L is capable of producing up to 311 amps at cold start (9,000 RPM) and maintains impressive output levels during hot operation, making it ideal for high-demand electrical systems. With its rugged construction, efficient cooling, and versatile regulation options, this alternator is a reliable power source for demanding applications where peak performance is essential.

Features:

• Engineered for high energy production, suitable for marine, RV, military, and commercial applications

• Rapidly charges large battery banks to ensure reliable power supply

• Advanced cooling system with dual fans and heat shedding coatings for cooler operation

• Exterior-mounted rectifier enhances durability and ease of maintenance

• Optimized for high performance at idle speeds to reduce engine load

• Available with internal or external voltage regulation options for flexible system integration

• Compatible with ARCO Zeus Bluetooth Alternator Regulator for optimal control and lithium battery charging

• SAE J1171 certified for quality and safety standards

• Constructed with OEM components for reliability and ease of replacement

• Large frame size with high amperage output capabilities for demanding electrical loads