Brand: ARCO Marine
ARCO Marine Zeus A275L Vortec Alternator with Regulator, 12V 311A, 4034
ARCO Marine Zeus A275L Vortec Alternator with Regulator, 12V 311A, 4034
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About this product
The ARCO Marine Zeus A275L Vortec Alternator is a high-output charging solution designed to rapidly replenish large battery banks. Engineered for marine, RV, commercial, and military applications, this unit operates 8-20% cooler than standard alternators to deliver sustained high amperage, even at idle speeds.
Key Features:
- Output: 311 Amps (cold, 9,000 RPM), 227 Amps (sustained cruising), and 198 Amps (sustained idle).
- Advanced Thermal Management: Features heat-shedding Cerakote and E-coat finishes, a housing-mounted rectifier, and dual cooling fans.
- Compatibility: Replaces Mando-type alternators using Vortec/GM pad mounting feet, common on Mercruiser and Volvo Penta marine engines (3.0GLM, 3.0GLP, 4.3GXi, 5.7GiL, 5.7GXiL).
- Regulation: Internally regulated (14.1V default) with an adapter option for external regulation using an ARCO Zeus Bluetooth alternator regulator.
- Construction: SAE J1171 certified and made in the U.S.A.
- Frame/Mounting: Large frame size, M8 side-mount battery post, and 6-groove 49mm pulley.
- Weight: 14.9 lbs.
Manuals & videos
- Secure checkout
- 21-day return requests
- Free standard shipping $100+
Product facts
- CT SKU
- CT-117905
- Model / MPN
- 4034
- UPC / GTIN
- 695845806575
- Package dimensions (H × W × L)
- 9" X 10" X 11"
- Package weight
- 16.5 lb
Specifications
- Type
- ARCO Marine Zeus A275L Vortec Alternator w/Regulator
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.
Need help choosing?
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.
