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Arco Starting & Charging 4024 Zeus A275L J-180 4" Marine Alternator with Regulator

Manufacturer

Arco Starting & Charging

<h3>ARCO Starting &amp; Charging: The Marine Industry&apos;s Gold Standard</h3><p>When a boater turns the key and nothing happens miles from the dock, the name they wish they had trusted is <strong>ARCO Marine</strong>. For more than six decades, ARCO Starting &amp; Charging has been the benchmark for dependable marine engine electrical components — building and testing every unit at their facility in Pensacola, Florida to ensure each part meets or exceeds original equipment manufacturer (OEM) specifications before it ever reaches a customer.</p><p>Founded in 1960, ARCO set out with a straightforward mission: deliver peace of mind to boat owners and marine technicians through products they can rely on. That philosophy hasn&apos;t changed. Every component ARCO manufactures — from outboard <a href="/7236-arco-starting-charging-starter-motor-4152">starter motors</a> to high-output alternators — is rigorously load-tested beyond normal operating conditions. It&apos;s the kind of commitment that has made ARCO the trusted choice of professional marine service technicians and weekend boaters alike for generations.</p><h3>Purpose-Built for the Harshest Marine Environments</h3><p>Saltwater, humidity, and vibration are relentless adversaries for any electrical component. ARCO engineers their products specifically for these conditions. Their <a href="/7236-arco-starting-charging-tilttrim-motors-201071">tilt/trim motors</a> and <a href="/7236-arco-starting-charging-trim-and-tilt-units-201108">trim and tilt units</a> are designed to perform reliably through years of saltwater exposure, while their <a href="/7236-arco-starting-charging-alternators-200087">alternators</a> — including the advanced Zeus High Output Alternator line — are purpose-built to charge modern battery banks faster and handle the electrical demands of today&apos;s feature-rich vessels. ARCO makes OEM replacement parts compatible with leading engine manufacturers including Mercury, Yamaha, Volvo Penta, MerCruiser, Honda, Evinrude, Suzuki, and many others, making cross-referencing straightforward for technicians and DIYers alike.</p><h3>Innovation with the Zeus High Energy Platform</h3><p>ARCO&apos;s Zeus line represents the brand&apos;s push into next-generation marine charging technology. Zeus High Output Alternators and Bluetooth-enabled voltage regulators are engineered for multi-voltage compatibility and rated IP68 for protection against water intrusion — a critical specification in marine applications. The Zeus ecosystem is purpose-built to support lithium battery banks, high-draw accessories, and demanding live-aboard or commercial use cases where consistent power output is non-negotiable.</p><h3>OEM Quality, Factory Warranty, American-Made</h3><p>ARCO backs their entire rotating electric parts lineup — including their <a href="/7236-arco-starting-charging-starters-inboard-201008">inboard starters</a> — with the ARCO Assurance warranty program, offering coverage against defects in materials and workmanship. Manufacturing, quality testing, warehousing, and fulfillment all take place in the United States, giving buyers confidence in consistent quality control from start to finish. For anyone maintaining a vessel and unwilling to compromise on reliability, ARCO Starting &amp; Charging remains the definitive choice in marine engine electrical components.</p>

Part Number

4024
09/12/2036 8:28 AM
Sale Price

$1,077.42

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Usually delivered within 2 days

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Product Details

The Arco Zeus A275L J-180 is a high-output 12-volt marine alternator engineered to deliver exceptional power production in a compact 4-inch saddle-mount design. This American-made alternator is purpose-built for demanding marine, RV, military, and commercial applications where reliable charging performance is critical.

Superior Cooling Technology:

The A275L runs 8-20% cooler than conventional alternators through advanced thermal management, including heat-shedding Cerakote or E-coat finish, dual cooling fans, and an innovative housing design that acts as a heat sink. Cooler operation translates directly to sustained high-amperage output and extended service life.

Impressive Power Output:

  • Maximum output of 311 amps at 9,000 RPM (cold)
  • Sustained cruising output of 227 amps at 6,000 RPM (hot)
  • Sustained idle output of 198 amps at 3,000 RPM (hot)
  • Optimized performance at low RPM eliminates the need for auxiliary generators
  • Rapidly charges large battery banks with consistent power delivery

Technical Specifications:

  • 12-volt system with 14.1V default output voltage
  • 138mm stator size with 16 rotor poles
  • Internal/external regulation capability (internally regulated with adapter for optional external regulator)
  • 12 avalanche-rated diodes (6 positive, 6 negative, 50A rated)
  • Cut-in at 1,061 alternator RPM; maximum 19,000 RPM
  • Standard 49K6 pulley (6-groove, 49mm) on 17mm diameter shaft
  • M8 threaded battery post with side mount configuration
  • Maximum continuous operating temperature: 230°F (110°C)
  • SAE J1171 certified

Application:

Designed to replace most Volvo Penta alternators using a 4-inch J-180 saddle-style mount. Compatible with ARCO Zeus Bluetooth alternator regulators and lithium battery charging systems for maximum performance optimization.

Made in the U.S.A. with premium components for reliability in harsh marine environments.

I did not receive mounting hardware and had to buy my own. Chatted with customer service and they said they would inform the warehouse. Nothing happened.

Easy order delivered on time

Fast service and shipping.

Fast easy and reasonably priced

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