![ARCO Marine Zeus A275L Vortec Alternator w/Regulator [4034]](https://cdn.shopify.com/s/files/1/0855/3916/0358/files/107330XL.jpg?v=1736193848)
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Ships within 48 hours · Estimated delivery Aug 4 - Aug 9
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Description
ARCO Marine Zeus A275L Vortec Alternator w/Regulator [4034]Zeus A275L Vortec 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. Runs 8 20% cooler than incumbent alternators due to: Heat shedding coatings, Rectifier located on housing exterior, Dual cooling fans, and OEM
Zeus A275L Vortec 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.
- Runs 8 - 20% cooler than incumbent alternators due to: Heat shedding coatings, Rectifier located on 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 Mando-type alternators using Vortec/GM pad mounting feet. (Found on many Mercruiser and Volvo Penta 3.0GLM, 3.0GLP, 4.3GXi, 5.7GiL, 5.7GXiL Marine Engines.) (GM Blocks)
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
4.2 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 3
Cute for girl's dorm room! Needs a wash/dry warning.
Color: Pastel Lilac, Size: Twin/Twin XL
Wash/dry by itself. Leaves lint on anything and everything that is washed and dried with it. Kiddo learned the hard way. Loves the blanket and it's feel and color but was disappointed with the left-over pills on the rest of her items from that 1 load. Soft, fluffy and lavender. Great for her dorm!
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Reviewed in the United States on December 19, 2025
★★★★★ 5
Beauty Quality Excellent Price!
Size: Queen (90x90 Inch), Color: Olive
Wonderful quality blanket! It’s light weight, warm without being heavy, beautiful rich color. Super fast shipping. Came in a smallish box and I was a little worried it would be cheap, but being experienced with items that come with the air sucked out so I waited to see. Sure enough, once the plastic was off it fluffed out and I popped it in the dryer for 5 minutes and all the wrinkles were gone too! I absolutely don’t need a bed spread because the finish looks like expensive silk velvet! I’m buying more for the other bedrooms! I ordered a Queen, olive, 90”x90”, price is incredible and I would have paid double to get this kind of quality!
Love the rich feel and gorgeous color of this blanket. I know they call it olive but it is actually a deep luxurious fern from an untouched dark forest filled with fairy houses and wonderous beings! I’m getting another, sigh…
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Reviewed in the United States on May 17, 2026
★★★★★ 5
Exactly as described
Size: Throw XL (50x70 Inch), Color: Navy
I wanted to get the little longer size, to help cover my feet while I sleep, because I sleep in a recliner due to back issues.
Wow! The material is super soft, and keeps just at the right temperature of warmth at night, so the material breathes well. The extra 10 inches is a godsend now.. My feet stay warm all night long now. So the fit is perfect! The quality of the blanket is great, I’ve had no problems with it. Although my white watch band is now blue.. so I guess the color likes to bleed a bit. I haven’t washed it yet, but I will wash it either alone or with dark colors, because I believe it will bleed its color a bit in the wash & perhaps in the dryer.
Still, with it being so comfortable and soft, I would highly recommend this blanket to everyone!
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Reviewed in the United States on April 17, 2026
★★★★★ 5
Buy it. Truly amazing.
Size: California King (102x96 Inch), Color: Black
It's a bit thinner than I thought and comes in a surprisingly small box but that doesn't matter at all because there's so much blanket and it's super soft, it feels like covering up with a cloud. Perfectly warm, perfectly cool and perfect for sharing the bed with a blanket hog (or your dog babies). Folds up nice and tight for storage too which is always a plus. Buy this, it's worth the price forsure.
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Blanket
Size: Twin (60x80 Inch), Color: Grey
This blanket is one of those go-to affordable staples—super soft, lightweight, and perfect if you want something cozy without feeling heavy or bulky.
⸻
👍 What stands out
* Soft microfiber fleece – smooth and cozy against the skin
* Lightweight but warm – good balance for all seasons
* Perfect twin size (60x80) – fits beds, couches, or layering
* Clean, simple design – grey goes with everything
* Durable stitching – double-needle edges help it last longer
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Reviewed in the United States on April 19, 2026
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