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Arco Starting & Charging A275L-12-N62-EX-49K6 Zeus Marine Alternator 275A 12V

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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

A275L-12-N62-EX-49K6
09/12/2036 7:03 AM
Sale Price

$737.71

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Product Details

The Arco Zeus A275L N62 is a high-output marine alternator engineered to deliver exceptional power in a compact package. With a maximum cold output of 311 amps and sustained idle output of 198 amps, this alternator is designed for demanding marine, RV, military, and commercial applications requiring rapid charging of large battery banks.

Advanced Cooling Technology:

  • Runs 8-20% cooler than conventional alternators through multi-layer cooling design
  • Heat-shedding Cerakote or E-coat finish absorbs less heat for sustained high-amperage output
  • Externally-mounted rectifier dissipates heat away from internal components
  • Dual cooling fans maximize airflow
  • Maximum continuous operating temperature rated to 230°F (110°C)

Performance Features:

  • Optimized for high output at idle speeds—delivers 198 amps sustained at 3,000 RPM
  • 16-pole rotor with 138mm stator for maximum efficiency
  • 12 avalanche-rated diodes (6 positive, 6 negative) rated at 50A each
  • Cut-in at just 1,061 alternator RPM for early charging
  • SAE J1171 certified for quality and performance
  • External regulation only—requires separate regulator (compatible with Arco Zeus Bluetooth regulators for lithium charging)

Construction & Specifications:

  • Voltage: 12V, output 14.1V (default)
  • Field type: P-Type (includes P-Type harness)
  • Weight: 14.9 lbs (6.7 kg)
  • Pulley: 49K6 (6-groove, 49mm diameter) on 17mm shaft
  • Shaft: 17mm diameter, 25mm long, threaded M17 x 1.5
  • Battery connection: M8 threaded post, side mount
  • Maximum alternator RPM: 19,000
  • Includes terminal block, mounting hardware, and washer

Applications:

Designed as a direct replacement for most Mercedes and BMW alternators, including Mercedes Sprinter models (1999-2006) and factory dual alternator systems (2007 and newer). Ideal for marine vessels, RVs, and commercial applications requiring reliable high-output charging to reduce or eliminate generator runtime.

Made in USA. Note: This product requires external regulator and may not be returned to point of purchase—contact manufacturer directly with questions or concerns.

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