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Arco Starting & Charging 4402 Zeus 24V 4kW Low Turn-On Marine Alternator

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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

4402
09/12/2036 8:58 AM
Sale Price

$1,236.09

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Product Details
Arco Starting & Charging 4402 ARCO MARINE ZEUS 24V 4KW LOW TURN ON (LTO) 3.15 ALTERNATOR

Zeus 24V 4kW Low Turn On (LTO) 3.15 Alternator with Isolated Ground (Common Rail)

The ARCO Zeus 24v 4kW LTO alternator turns on at lower RPMs, runs cooler, and provides more power than older designs that are larger and heavier. This alternator continuously generates over 1.4kW (51 Amps) at just under 1,500 RPM and almost 2.4kW (87 Amps) at 2,000 Alternator RPM. Put in real-world terms, a marine diesel engine idling at 750 RPM with a 2:1 pulley ratio is generating over 1.5kW (55 Amps), and a Mercedes Sprinter at 750 RPM with a 3.21:1 ratio is generating over 2.5kW (91 Amps)!

The ARCO Zeus 24v 4kW alternator turns on at lower RPMs, runs cooler, and provides more power than older designs that are larger and heavier. The newest generation of 24V performance has arrived.

Competitor’s 24V alternators utilize a 12V rotor and field current which is less efficient and limits output at all RPMs. ARCO utilizes a native 24V rotor and field current. This results in our 24V alternator running cooler than competitor’s 24V alternators, having a direct impact on the alternator lifespan.

Features:

  • Engineered for high energy production.
  • Suitable for marine, RV, military, and commercial applications.
  • Rapidly charges large battery banks.
  • Coolest operating temperatures for increased performance:
  • Heat shedding coatings
  • Rectifier located on housing exterior
  • Dual cooling fans
  • OEM components
  • Optimized for performance at cruising speeds.
  • Reduces the need for a generator by creating additional power with your engine.
  • Unleash peak performance with E-Coat/Cerakote, keeping the high amp alternator cooler for sustained amperage output.
  • Use the ARCO Zeus Bluetooth Alternator Regulator for maximum performance or lithium battery charging.
  • SAE J1171 Certified.
  • Proudly made in the U.S.A.

Technical Specifications:

  • Voltage - 24v
  • Field Type - P
  • Rotor Poles - 16
  • Stator Size - 138mm
  • Frame Size - Large
  • Weight - 15.89lbs/7.2kg
  • Regulation - External Only
  • Finish - (Black) E-coating
  • Cut-In RPM - 1,072 Alternator RPM
  • Maximum Alt RPM - 19,000
  • Battery Post - M8 Thread Post, Side Mount
  • Standard Pulley - 49K6 (6-groove, 49mm)
  • Pulley Mount - 17mm diameter shaft, 25mm long, threaded M17 x 1.5
  • Pulley Hardware - M17 x 1.5 x 24mm nut, w/ 18mm ID x 29mm OD washer (Included)
  • Diodes - 6 positive, 6 negative, 50A Rated, Avalanche
  • Max Output (Cold, 9,000 RPM) at 27.5v - 144 Amps - 3,960 Watts – 5.7Kw PTO
  • Sustained Cruising Output (Hot, 6,000 RPM) at 27.5v - 130 Amps - 3,575 Watts – 5.1Kw PTO
  • Sustained Idle Output (Hot, 3,000 RPM) at 27.5v - 108 Amps - 2,970 Watts – 4.2kW PTO
  • Max Continuous Operating Temperature - 100°C / 212°F

Mounting Application:

  • Must Be used on Yanmar Common Rail Engines introduced after 2013 (JH-CR, 3JH40, 4JH45, 4JH57, 4JH80, 4JH110).

Fast and easy

Service was very good as well as the product

10/10 service.

Good price

Quick and easy order as usual.

No issues

Good

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