ARCO Marine Zeus A275L J-180 4" Alternator w/Regulator [4024]
SKU: 40531424421

ARCO Marine Zeus A275L J-180 4" Alternator w/Regulator [4024]

Sale price$493.52 Regular price$548.35
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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

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Description

ARCO Marine Zeus A275L J-180 4" Alternator w/Regulator [4024]Zeus A275L J 180 4" Alternator with Regulator The highest power output alternator in its size class. 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. It runs 8 20% cooler than incumbent alternators due to heat shedding coatings, a refrigerator on the housing exterior, dual cooling fans, and OEM

Zeus A275L J-180 4" Alternator with Regulator

The highest power output alternator in its size/class. 

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. 
  • It runs 8 - 20% cooler than incumbent alternators due to heat-shedding coatings, a refrigerator on the housing exterior, dual cooling fans, and OEM components.
  • It is optimized for performance at idle speeds.
  • Reduces the need for a generator by creating additional power with your engine.
  • Unleash peak performance with E-Coat/Cerakote. Our advanced coating absorbs less heat, keeping the A275L cooler. This translates to more amperage for sustained periods.
  • Use an ARCO Zeus Bluetooth alternator regulator or lithium battery charging for maximum performance.
  • SAE J1171 Certified.
  • Made in the U.S.A.

Technical Specifications:

  • Voltage - 12v
  • Field Type - P
  • Rotor Poles - 16
  • Stator Size - 138mm
  • Frame Size - Large
  • Weight - 14.9 lbs/6.7 kg
  • Regulation - Internal/External (Internally regulated with adaptor for optional external regulation.) 
  • Output Voltage - 14.1v (Default)
  • Finish - (Black) Cerakote or E-coating
  • Cut-In RPM - 1,061 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) - 311 Amps
  • Sustained Cruising Output (Hot, 6,000 RPM) - 227 Amps
  • Sustained Idle Output (Hot, 3,000 RPM) - 198 Amps
  • Max Continuous Operating Temperature - 110°C / 230°F

Mounting Application:

  • Replaces most Volvo Penta alternators using a 4” J180 saddle-style mount

Quick Guide (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: 40531424421

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JR
Houston, US
★★★★★ 5
Watch is not thin and is difficult to wear with long sleeve button downs
Color: Grey on Stainless Steel, Color: Grey on Stainless Steel
Great watch with distinctive style! Prefer the casual look with the accompanying rubber straps.
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Reviewed in the United States on January 18, 2026
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JR
Alexandria, US
★★★★★ 5
Watch is not thin and is difficult to wear with long sleeve button downs
Color: Grey on Stainless Steel, Color: Grey on Stainless Steel
Great watch with distinctive style! Prefer the casual look with the accompanying rubber straps.
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Reviewed in the United States on January 18, 2026
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Amazon Customer
Carnegie, US
★★★★★ 5
Bad stitching
Size: Large, Color: Bright White
The shoulder seam missing stitching. So there was an inch hole in the seam. I stitched it myself but really should have returned for a replacement. I bought two others in different colors and the stitching was fine. I do love the fit of these t-shirts.
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Reviewed in the United States on May 12, 2026
R
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Robb
Alexandria, US
★★★★★ 5
Quality clothing brand.
Size: X-Large, Color: Royal Blue
Well made and soft and comfortable. True to size. The material is stretchy and not tight fitting. I don't like tight fitting shirts. Nautica is a premium brand. Great with jeans and even better with shorts during the summer.
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Reviewed in the United States on November 27, 2025
C
Verified Purchase
CGShopper
Natrona Heights, US
★★★★★ 4
Nautical is a great brand
Size: XX-Large, Color: Red
Total quality T-shirt....Rich red color as shown on line - BUT was a little surprised to feel it has some nylon is the material and not the 100% cotton I thought I was buying. Up side, means it won't shrink much washing, but in the super HOT Texas heat - this year - kind of wanted the totally light feel. Love and prefer the V-Neck. Would definitely recommend this item and seller. Pkg arrived early.
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Reviewed in the United States on August 11, 2023

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