# ARCO Marine Zeus A225S Vortec Alternator w/Terminal Block [4017]

**Zeus A225S Vortec Alternator with 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. Runs 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. This translates to more amperage for sustained periods.
-   For maximum performance or lithium battery charging, use an ARCO Zeus Bluetooth alternator regulator.
-   SAE J1171 Certified.
-   Proudly made in the U.S.A.

**Technical Specifications:**

-   Voltage - 12v
-   Field Type - P
-   Rotor Poles - 16
-   Stator Size - 130mm
-   Frame Size - Small
-   Weight - 12lbs/6.7kg
-   Regulation - External Only
-   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 Application:**

-   Replaces Mando type alternators using Vortec/ GM pad mounting feet (Found on many Mercruiser and Volvo Penta 3.0GLM, 3.0GLP, 4.3GXi, 5.7GiL, 5.7GXiL Marine Engines.) (GM Blocks)

## Details

- **Price:** 767.8 USD
- **Type:** Alternators
- **Tags:** Brand_ARCO Marine, Engine Parts & Service, Engine Parts & Service | Alternators, MRP

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 767.80 USD | In stock |

## Images

- ARCO Marine Zeus A225S Vortec Alternator w/Terminal Block [4017] ARCO Marine

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> Source: [Besafe1st](https://besafe1st.com/products/arco-marine-zeus-a225s-vortec-alternator-w-terminal-block-4017)
> Updated: 2026-05-21