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Arco Starting & Charging 4023 Zeus A275L High Output Marine Alternator 4" J180

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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

4023
09/12/2036 9:10 AM
Sale Price

$1,014.47

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Product Details

The Arco Zeus A275L is the highest power output alternator in its size and class, engineered for high energy production. This model features a 4" J180 saddle-style dual foot mounting configuration with isolated ground and terminal block, delivering exceptional 12-volt charging performance with SAE J1171 certification and proudly made in the USA.

Performance Specifications:

  • 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)
  • Reduces the need for a generator by creating additional power with your engine

Advanced Cooling Technology:

  • E-Coat/Cerakote advanced coating absorbs less heat, keeping the alternator cooler for sustained amperage output
  • Runs 8-20% cooler than competitors, enabling more amperage for sustained periods
  • Heat-shedding coatings, exterior-mounted rectifier, dual cooling fans, and highest-quality OEM parts
  • Maximum continuous operating temperature of 110°C (230°F)

Key Features:

  • Suitable for marine, RV, military, and commercial applications
  • Rapidly charges large battery banks
  • 16-pole rotor with 138mm stator size for maximum efficiency
  • 6 positive and 6 negative 50A rated avalanche diodes
  • External only regulation with terminal block and P-Type harness included; requires external regulator such as ARCO Zeus Bluetooth alternator regulator
  • Standard 49K6 pulley (6-groove, 49mm) with 17mm diameter shaft
  • Replaces most Volvo Penta alternators using 4" J180 saddle-style mount

The Zeus A275L is optimized for performance at idle speeds, making it ideal for vessels and vehicles that demand high amperage output even at lower engine RPMs. Pair with an ARCO Zeus Bluetooth alternator regulator for maximum performance or lithium battery charging capabilities.

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