ARCO Marine Zeus A225S 3.15 Alternator with Isolated Ground for Common Rail Engines

Zeus A225S 3.15 Alternator with Isolated Ground (Common Rail) 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, running 8-20% cooler than incumbent alternators due to:


• 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. Our advanced coating absorbs less heat, keeping the A225S cooler for sustained amperage output.


• Use the ARCO Zeus Bluetooth Alternator Regulator for maximum performance or lithium battery charging.


• SAE J1171 Certified.


• Models are available with an internal/external voltage regulator.


• Proudly made in the U.S.A.

Technical Specifications:

• Voltage - 12v


• Field Type - P


• Rotor Poles - 16


• Stator Size - 130mm


• Frame Size - Small


• Weight - 12 lbs/5.4 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) - 254 Amps


• Sustained Cruising Output (Hot, 6,000 RPM) - 187 Amps


• Sustained Idle Output (Hot, 3,000 RPM) - 157 Amps


• Max Continuous Operating Temperature - 110C / 230F

Mounting Application:

• Must be used on Yanmar Common Rail introduced after 2013 (JH-CR, 3JH40, 4JH45, 4JH57, 4JH80, 4JH110)

The ARCO Marine Zeus A225S 3.15 alternator is designed to deliver the highest power output within its size and class, making it ideal for demanding marine, RV, military, and commercial applications. Engineered for high energy production, this alternator features advanced heat shedding coatings and dual cooling fans that enable it to operate 8-20% cooler than standard models. This cooling efficiency enhances performance and longevity by reducing operating temperatures, ensuring reliable power generation even under heavy loads. The exterior-mounted rectifier and the use of OEM components further optimize heat dissipation and durability, supporting sustained operation in rugged environments.

This alternator is built to rapidly charge large battery banks with a default output voltage of 14.1 volts, suitable for a variety of electrical systems. Its internal/external regulation capability, with an optional adaptor, provides flexible voltage management, making it adaptable to different setups. The inclusion of the ARCO Zeus Bluetooth Alternator Regulator allows for maximum performance tuning and lithium battery charging, offering modern control options. Certified SAE J1171, the Zeus A225S is manufactured in the USA, ensuring strict quality standards and reliability.

Constructed with high-quality materials like Cerakote or E-coating finishes, the alternator offers excellent corrosion resistance. Its compact frame, weighing approximately 12 pounds, fits well in limited spaces and is suitable for use on Yanmar Common Rail engines introduced after 2013. With a maximum RPM of 19,000 and a cut-in RPM of just over 1,000, this alternator provides ample power across a wide range of engine speeds. Its robust design includes a side-mount M8 threaded post and a standard 6-groove pulley, making installation straightforward. Whether for marine applications or heavy-duty vehicle systems, the ARCO Marine Zeus A225S ensures high performance, durability, and efficiency for your power needs.

Features:

• Engineered for high energy production to meet demanding power requirements

• Suitable for marine, RV, military, and commercial applications

• Rapidly charges large battery banks for extended power needs

• Operates 8-20% cooler due to heat shedding coatings and dual cooling fans, enhancing performance and lifespan

• Exterior-mounted rectifier and OEM components for improved heat dissipation

• Optimized for performance at idle speeds to ensure consistent power output

• Reduces reliance on generators by generating additional power through engine operation

• Advanced E-Coat/Cerakote coating absorbs less heat, maintaining cooler operating temperatures

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

• SAE J1171 certified for quality and safety standards

• Available with internal or external voltage regulation options

• Made in the USA with high-quality components and craftsmanship