ARCO Marine Zeus A225S 3.15 Alternator w/Case Ground (Common Rail) Terminal Block [4012]

Zeus A225S 3.15 Alternator: High - Power for Multiple Applications

Get the alternator with the highest power output in its size class. It's a powerhouse designed for high - energy production!

Features:

• Perfect for marine, RV, military, and commercial use.
• Charge large battery banks quickly.
• Run 8 - 20% cooler than other alternators thanks to heat - shedding coatings, an exterior rectifier, and dual cooling fans.
• Made with OEM components and optimized for idle - speed performance.
• Create extra power with your engine, reducing the need for a generator.
• The E - Coat/Cerakote keeps it cool for consistent amperage output.
• Pair with the ARCO Zeus Bluetooth Alternator Regulator for top performance or lithium battery charging.
• SAE J1171 Certified and proudly made in the U.S.A.
• Available with internal or external voltage regulators.

Technical Specifications:

• Voltage: 12v
• Field Type: P
• 16 Rotor Poles, 130mm Stator Size
• Small Frame, 12 lbs/5.4 kg
• Internal/External Regulation
• Output Voltage: 14.1v (Default)
• Black Cerakote or E - coating Finish
• Cut - In RPM: 1,061 Alternator RPM
• Max Alt RPM: 19,000
• M8 Thread Post, Side - Mount Battery Post
• 49K6 (6 - groove, 49mm) Standard Pulley
• 17mm diameter shaft, 25mm long, threaded M17 x 1.5 Pulley Mount
• M17 x 1.5 x 24mm nut with 18mm ID x 29mm OD washer (Included)
• 6 positive, 6 negative, 50A Rated, Avalanche Diodes
• 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: 110°C / 230°F

Mounting Application:

• For Yanmar Common Rail engines introduced after 2013 (JH - CR, 3JH40, 4JH45, 4JH57, 4JH80, 4JH110)

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Quick Guide (pdf)
Brochure (pdf)

Using the ARCO Marine Zeus A225S 3.15 Alternator is easy. First, make sure your engine is a Yanmar Common Rail introduced after 2013, like the JH - CR, 3JH40, 4JH45, 4JH57, 4JH80, or 4JH110. Then, install it according to the standard mounting instructions. If you want to get the most out of it, you can use the ARCO Zeus Bluetooth Alternator Regulator. It's great for charging lithium batteries too. When it comes to maintenance, keep an eye on the operating temperature. The alternator can run at a maximum continuous temperature of 110°C / 230°F. Since it has heat - shedding coatings and dual cooling fans, it runs cooler than others, but still, avoid overheating. Also, check the pulley and its hardware regularly to ensure they're in good condition. The included M17 x 1.5 x 24mm nut and 18mm ID x 29mm OD washer should be tightened properly. If you notice any unusual noises or a drop in performance, it might be time to have it checked. Overall, with proper use and maintenance, this alternator will serve you well in your marine, RV, military, or commercial applications.