Pay in installments of $143.96 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 25 - Jul 30
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
ARCO Marine Zeus A275L J180 4" Alternator w/Isolated Ground Regulator [4025]Zeus A275L J180 4" Alternator with Isolated Ground & 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. Heat shedding coatings Rectifier located on housing exterior Dual cooling fans OEM components Optimized for performance at idle
Zeus A275L J180 4" Alternator with Isolated Ground & 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.
- Heat shedding coatings
- Rectifier located on housing exterior
- Dual cooling fans
- OEM components
- 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, keeping the A275L cooler for sustained amperage output.
- Use the ARCO Zeus Bluetooth Alternator Regulator for maximum performance or lithium battery charging.
- SAE J1171 Certified.
- Models are available with an internal/external voltage regulator.
- Proudly 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)
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:
- 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
4.7 ★★★★★
Based on 15 reviews
Sort
Product Reviews
★★★★★ 3
Failed Quality Check
The construction is nice and the color and size are good. I like that it has functional pockets.
I’m giving three stars based on the fact that it arrived dirty. There are stains in two spots and will need to be spot treated before washing.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 20, 2026
★★★★★ 5
Great product for the price
Size: 4T, Color: Black
Great product for the price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2022
★★★★★ 5
Good quality
Was used for a costume, it fit my little boy really well & held up great despite washing multiple times
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 10, 2019
★★★★★ 5
Good buy
Second time purchasing a variant of this item. Of good quality, no accessories were missing, material is very good, true to colour and does not fade easily, fit exact, hence size up if needed.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026
★★★★★ 5
Perfect for my son!
Color: Purple, Size: 7 Years, Color: Purple, Size: 7 Years
Loved that the pants were adjustable and it fit my son perfectly and was shipped fast for Halloween! This was cheaper than a Halloween costume but the quality was 10x better than any bulk Halloween costume store !
We did a DIY joker & I absolutely loved how it turned out ! Definitely could use this for a formal event !
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 28, 2026