Brand: ARCO Marine
ARCO Marine Zeus A275L 12V 311A Single Foot Alternator, 1"-2"
ARCO Marine Zeus A275L 12V 311A Single Foot Alternator, 1"-2"
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About this product
The ARCO Marine Zeus A275L is a high-output 12V alternator engineered for marine, RV, military, and commercial applications. Designed for rapid charging of large battery banks, it delivers a maximum cold output of 311 Amps and maintains 198 Amps of sustained output at idle. This unit features advanced thermal management, including dual cooling fans, a heat-shedding Cerakote and E-Coat finish, and an externally mounted rectifier to ensure cooler operation and consistent performance.
Key Features:
- Fits most domestic styles with a 1" or 2" single mounting foot, such as Motorola and Prestolite configurations
- Optimized for performance at low idle speeds
- Runs 8-20% cooler than standard alternators to support sustained high-amperage output
- Supports both internal and external regulation (adapter required for external)
- SAE J1171 certified and made in the U.S.A.
- Max operating temperature: 110°C (230°F)
- Includes M17 x 1.5 pulley hardware
Technical Specifications:
- Voltage: 12V
- Max Output: 311 Amps (Cold, 9,000 RPM)
- Sustained Output: 227 Amps (Hot, 6,000 RPM)
- Weight: 14.9 lbs
- Pulley: 49K6 (6-groove, 49mm)
- Shaft: 17mm diameter
- Battery Post: Side-mount M8 thread
- Manufacturer Part Number: 4029
Manuals & videos
- Secure checkout
- 21-day return requests
- Free standard shipping $100+
Product facts
- CT SKU
- CT-117899
- Model / MPN
- 4029
- UPC / GTIN
- 695845934155
- Package dimensions (H × W × L)
- 10" X 10" X 10"
- Package weight
- 16.42 lb
Specifications
- Type
- ARCO Marine Zeus A275L 1"-2" Single Foot Alternator w/Regula
Fit-sensitive item: confirm measurements, model numbers, and manufacturer details before ordering. Tug & Tow does not guarantee universal compatibility from a product page alone.
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Shipping & returns
Shipping & returns
Request an eligible return within 21 calendar days after delivery. Every physical return requires written approval and an RMA number and must be shipped within five business days after the RMA is issued. The customer pays return shipping for an ordinary return. Tug & Tow provides prepaid return shipping for a verified damaged, defective, short, or incorrect shipment. We do not charge a restocking fee. See Shipping & Returns for eligibility, exclusions, and details.
Fit & compatibility
Fit & compatibility
Review the product title, description, images, dimensions, part numbers, and manufacturer details before purchase. For fit-sensitive items, confirm compatibility with your boat, RV, trailer, vehicle, or equipment.
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Need help choosing?
Send us the product link or SKU, plus details about your boat, RV, trailer, vehicle, or project. We will help you narrow down the right option when product fit is not obvious.
