SKU: 9109321220

ARCO Marine Zeus 24V 4kW Low Turn On (LTO) 3.15 Alternator w/Isolated Ground [4401]

Sale price$642.51 Regular price$713.90
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Ships within 48 hours · Estimated delivery Aug 10 - Aug 15

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Description

ARCO Marine Zeus 24V 4kW Low Turn On (LTO) 3.15 Alternator w/Isolated Ground [4401]Zeus 24V 4kW Low Turn On (LTO) 3. 15 Alternator with Isolated Ground 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

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

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:

  • Replaces most small case styles using a 3.15" J180 saddle style mount (e.g., Hitachi, Lucas, Mitsubishi) Most Yanmars.

Quick Guide (pdf)
Brochure (pdf)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 9109321220

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4.6 ★★★★★
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F
Verified Purchase
Freddy Pereira
Lake Worth, US
★★★★★ 3
A little difficult to read.
Color: GMT Blue
Very good watch, but I would have liked it to be bigger, about 43 mm, a little difficult to read.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 19, 2025
R
Verified Purchase
ross friedman
Draper, US
★★★★★ 5
Funky reissue!
Color: GMT Blue, Color: GMT Blue
Absolutely love this watch! The quality is fantastic as well as the price. Such an attention grabber.
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Reviewed in the United States on May 23, 2024
A
Verified Purchase
Anne
Waukegan, US
★★★★★ 5
Excellent Watch
Color: Gold Silver-G8408
I don't know why this watch is getting a less than perfect rating from others. I purchased this watch legit to make sure my son got out of the shower at the gym on time to get where he is going. LOL It is classy, elegant and yes, has been exposed to sweat, water and soap extensively, and still looks fantastic. He is getting the black one next.
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Reviewed in the United States on November 27, 2025
J
Verified Purchase
Judi
Waukegan, US
★★★★★ 5
Easy to read and set.
Easy to read and set, especially for poor eyesight. No complications!
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Reviewed in the United States on March 19, 2026
J
Verified Purchase
J. Westbrook
Louisville, US
★★★★★ 4
looks good but is unreliable; replacement coming
Color: Gold Blue-G8408
Update: The company reached out to me and offered me either a refund or a replacement watch. I bumped my rating up by two stars for that good customer service, and I'll provide another update once I have the replacement and see how it works. This watch looks great, was a good price, and I enjoy wearing it. The problem is that it keeps stopping. An unreliable watch is a big problem. Unfortunately, I was out of the country and didn't get to return it in time before the return window closed. If it worked properly, I would have given it a five-star rating.
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Reviewed in the United States on July 18, 2025

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