My Account
Shopping Cart

Arco Starting & Charging 4022 Zeus A275L J-180 4" Marine Alternator 275A

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

4022
09/12/2036 8:28 AM
Sale Price

$915.58

In Stock (7)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Arco Zeus A275L is a high-output 275-amp marine alternator engineered to deliver exceptional power in a compact 4" J-180 saddle-mount design. Built in the USA with advanced thermal management technology, this alternator provides the highest power output in its size class, making it ideal for marine vessels with demanding electrical systems and large battery banks.

Advanced Cooling Technology:

The A275L operates 8-20% cooler than conventional alternators through innovative engineering. Heat-shedding Cerakote or E-Coat finishes, dual cooling fans, and optimized housing design with exterior refrigeration fins ensure sustained high-amperage output even under continuous heavy loads. Maximum continuous operating temperature is rated at 230°F (110°C).

Performance Specifications:

  • Maximum output: 311 amps (cold, 9,000 RPM)
  • Sustained cruising output: 227 amps (hot, 6,000 RPM)
  • Sustained idle output: 198 amps (hot, 3,000 RPM)
  • 12-volt system with 14.1V default output voltage
  • Low cut-in speed: 1,061 alternator RPM for excellent idle performance
  • Maximum alternator RPM: 19,000
  • Large-frame stator: 138mm with 16 rotor poles
  • Avalanche-rated diodes: 6 positive, 6 negative, 50A rated

Technical Details:

  • External regulation only (P-Type field) - includes terminal block and P-Type harness
  • Compatible with Arco Zeus Bluetooth regulators for advanced battery management
  • Standard 6-groove 49mm pulley (49K6) included
  • 17mm diameter shaft, 25mm long, threaded M17 x 1.5
  • M8 thread battery post with side mount configuration
  • Mounting hardware and washer included
  • SAE J1171 Marine certified

Applications:

Designed for marine, RV, military, and commercial applications requiring high electrical output. Replaces most Volvo Penta alternators using 4" J-180 saddle-style mounts. Ideal for vessels with house battery banks, inverter systems, and extensive electronics. Reduces or eliminates the need for generator runtime by maximizing engine-driven charging capacity.

This alternator is optimized for lithium battery charging when paired with compatible external regulators. Made in the USA with premium OEM components for long-term reliability in harsh marine environments.

Received order as promised, packaged well and items were exactly as advertised.

Easy-to-use, had part I NEED.

great

Was referred to by a fellow enthusiast from the Saleen Club Of America. Found exactly what I was looking for. Thanks Kevin

Great price and fast shipping! Did I mention a great price!

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy