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Description
ARCO Marine Zeus A275L J-180 4" Alternator w/RegulatorZeus 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:
- 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
4.1 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
Worth the price and comfort
Size: 12, Color: Allgrey015, Size: 12, Color: Allgrey015
Honestly I love these shoes. Of course I was skeptical when buying them but I’m glad I did! I use to wear the classic Vans on the daily and these shoes are much lighter and breath way more! Plus when you get them wet they dry very fast and keep the forum. The traction on the shoot is incredible. The versatility it impeccable. I have a pear for light hiking and water sports and everyday use.
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Reviewed in the United States on May 20, 2026
★★★★★ 5
✅ I love it
Size: 9.5, Color: Grey015, Size: 9.5, Color: Grey015
✅ I bought these shoes to run and wear around the house and they are good
✅ I love that they are light weight because it feels like nothing when I am running. I feel faster when wearing these shoes while running.
✅ I like how the shoe looks basic and not flashy. So not only do I wear them to the gym, I also wear them when I’m going grocery shopping or just doing everyday task so they are very versatile.
✅ I have flat set and this shoe fits perfectly and is very comfortable like wearing slides. Even the sole that come with them soft but when I go on long runs, I change them out for more customized soles.
⚠️ these shoes has NO traction when running off road (pavement). I learned that part the hard way when I kept slipping on inclines.
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Reviewed in the United States on May 29, 2026
★★★★★ 4
Light as a feather
Size: 7, Color: Alloffwhite015
Fits me perfectly even without socks. Light as a feather. How long it will last is another story. Price is excellent for Black Friday deal. It is not a slip on shoe even if it looks like one at the heel; however, it is not hard to put on with a little help with hands and fingers. The cushion is not a thick one but it feels like it is because of the rubber sole that is so light. It feels comfortable to wear as it wraps and hugs around your feet with the cloth material & does not stretch much. It looks good on my feet.
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Reviewed in the United States on November 29, 2025
★★★★★ 5
Incredible shoe
Size: 13, Color: Allblack015
Genuinely the best running shoes I’ve ever had, and for the price is crazy. Seriously, can go for 2 hours on the treadmill with no foot pain, can’t recommend enough
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Reviewed in the United States on May 25, 2026
★★★★★ 3
So small
Size: 10.5, Color: Allblack015
They seemed comfy enough, but the sizes are very small compared to my typical shoe size. Buy at least a whole size up if youre going to get these
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Reviewed in the United States on April 25, 2026