ARCO Marine Zeus A225S J-180 3.15 Alternator w/Regulator [A225S-12-DF315-IE-49K6]

Zeus A225S J-180 3.15' Alternator with Regulator: A High-Powered Solution

This alternator offers the highest power output in its size and class. It's engineered to produce high energy, making it suitable for marine, RV, military, and commercial use.

Key Features:

• High energy production for your needs.
• Works great in various applications like marine, RVs, military, and commercial settings.
• Quickly charges large battery banks.
• Runs 8 - 20% cooler than other alternators. Thanks to heat shedding coatings, an exterior rectifier, and dual cooling fans, it maintains high performance.
• Uses OEM components for reliability.
• Performs well at idle speeds.
• Creates extra power with your engine, reducing the need for a generator.
• The E-Coat/Cerakote coating keeps it cool, delivering more amperage over time.
• For best performance or lithium battery charging, pair it with an ARCO Zeus Bluetooth alternator regulator.
• It's SAE J1171 certified and proudly made in the U.S.A.

Technical Details:

• Voltage: 12v
• Field Type: P
• 16 Rotor Poles
• 130mm Stator Size
• Small Frame Size
• 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, 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

Mounting:

• Replaces most small case styles using a 3.15” J180 saddle style mount (e.g., Hitachi, Lucas, Mitsubishi) and fits most Yanmars.

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)

Using the ARCO Marine Zeus A225S J-180 3.15 Alternator is straightforward. First, make sure it's correctly mounted. It can replace most small - case alternators with a 3.15” J180 saddle style mount. Connect it to your engine and battery following the standard electrical connection procedures. If you have a lithium battery or want maximum performance, use an ARCO Zeus Bluetooth alternator regulator. When using, keep an eye on the RPM. The alternator starts producing power at 1,061 RPM and has a maximum RPM of 19,000. For maintenance, check the cooling fans regularly to ensure they are working properly. The heat - shedding coatings and the exterior rectifier help keep it cool, but a clean and well - ventilated environment is still beneficial. If you notice any abnormal noises or a drop in performance, contact the manufacturer directly as this product can't be returned to the original point of purchase.