• ARCO Marine Zeus A275L J-180 4" Alternator, 12V 311A Max – Made in USA
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Brand: ARCO Marine

ARCO Marine Zeus A275L J-180 4 in. Alternator with Terminal Block

ARCO Marine Zeus A275L J-180 4 in. Alternator with Terminal Block

$1,044.72
$1,044.72
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About this product

The ARCO Marine Zeus A275L J-180 4 in. Alternator is engineered for high-energy production across marine, RV, military, and commercial applications. Designed to charge large battery banks efficiently, this unit features heat-shedding Cerakote and E-Coat finishes, dual cooling fans, and advanced thermal management to operate 8 to 20% cooler than standard alternators. Optimized for high performance at idle, this unit helps reduce generator dependency.

Key Features and Specifications:

  • Voltage: 12v
  • Maximum output (Cold, 9,000 RPM): 311 Amps
  • Sustained cruising output (Hot, 6,000 RPM): 227 Amps
  • Sustained idle output (Hot, 3,000 RPM): 198 Amps
  • Mounting: J-180 4 in. saddle-style (replaces most Volvo Penta alternators)
  • Regulation: External only (includes terminal block and P-Type harness; requires external regulator such as ARCO Zeus Bluetooth)
  • Operating Temperature: Up to 110°C (230°F)
  • Standard Pulley: 49K6 (6-groove, 49mm)
  • Weight: 14.9 lbs
  • SAE J1171 certified
  • Made in the U.S.A.

Each unit includes pulley mounting hardware (M17 x 1.5 x 24mm nut and 18mm ID x 29mm OD washer). Requires an external regulator for operation.

Manuals & videos

  • Secure checkout
  • 21-day return requests
  • Free standard shipping $100+

Product facts

CT SKU
CT-117890
Model / MPN
4022
UPC / GTIN
695845717048
Package dimensions (H × W × L)
9" X 10" X 10"
Package weight
16.55 lb

Specifications

Type
ARCO Marine Zeus A275L J-180 4" Alternator w/Terminal Block

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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

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