![ARCO Marine Zeus A275L 3.15 Alternator w/Isolated Ground Terminal Block [4019]](https://cdn.shopify.com/s/files/1/0704/3376/7726/files/107504XL.jpg?v=1738715428)
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Description
ARCO Marine Zeus A275L 3.15 Alternator w/Isolated Ground Terminal Block [4019]Zeus A275L 3. 15 Alternator with Isolated Ground & Terminal Block 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
Zeus A275L 3.15 Alternator with Isolated Ground & Terminal Block
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 available with 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 small case styles using a 3.15" saddle style mount (e.g., Hitachi, Lucas, Mitsubishi). Most Yanmars. Requires Standard single "V" belt upgrading to a Serpentine System
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
4.2 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 5
Super comfy and pretty
Color: Black, Size: X-Large
Fit is nice and comfortable!!! Soft in the inside as well! It’s not huge but also doesn’t stick to me.
You can literally wear it down (casual with jeans or shorts) or dress up (like I did for Mother’s Day with a nice skirt and jacket)
Seems breathable enough for our California heat
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Great buy. Love this shirt!
Color: Teal, Size: Medium
This shirt is so great. The color is absolutely stunning and vibrant! The material is so soft and comfortable. I use it as a casual work shirt with capri leggings, and stay comfortable all day. It definitely runs a bit large. I am short so it hangs very long but I like my shirts that way for work. I am usually somewhere between a small and a medium and I like a loose fit so I got a Medium. This was almost too big for me to wear, but I am making it work. I plan to buy this shirt in multiple colors and will get a small next time. For reference, I am 5"2', 126lbs, bra size 34 C.
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Reviewed in the United States on May 15, 2026
★★★★★ 5
Love this shirt.
Color: Dark Blue, Size: X-Large
Love this shirt. Fabric is so soft and comfortable. Fit is true to size and fits perfect. I will buy more in other colors.
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Feels soft!
Color: Black, Size: 4X-Large
The fabric is great, as is the weight, fit, color. It covers the backside and doesn’t bulge around the hip. Would love to see it in several colors!
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Really great quality and fit for the price
Color: Navy Blue, Size: Large
These tank tops are beautifully cut, the colors are great, the fabric is stretchy and comfortable and they don’t look at all cheap. A very welcome surprise that they exceeded expectations. I spend the entire summer in slim fit tanks and A-line skirts with a jean jacket or shirt over and ended up buying practically every color because I like them so much - can pair them with much more high end items and they don’t look out of place.
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Reviewed in the United States on May 25, 2026