Arco Zeus A275L High Output Alternator

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
  • 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 (Arco's advanced coating absorbs less heat, keeping the A275L cooler - this translates to more amperage for sustained periods)
• Use an Arco Zeus Bluetooth alternator regulator for maximum performance or lithium battery charging
• SAE J1171 Certified
• Made in the U.S.A

Specifications:

• Voltage: 12V
• Field Type: P
• Rotor Poles: 16
• Stator Size: 138 mm (5.43")
• Frame Size: Large
• Weight: 14.9 lbs (6.7 kg)
• 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: 49 mm (1.93") K6
• Clutch Pulley: 50 mm (1.97") K6
• Pulley Mount: 17 mm (0.67") dia. shaft, 25 mm (0.98") long, threaded M17 x 1.5
• Pulley Hardware: M17 x 1.5 x 24 mm (0.95") nut, with 18 mm (0.71") ID x 29 mm (1.14") OD washer (included)
• Diodes: 6 positive, 6 negative, 50A Rated, Avalanche
• Max Output (Cold, 9,000 RPM): 311A
• Sustained Cruising Output (Hot, 6,000 RPM): 227A
• Sustained Idle Output (Hot, 3,000 RPM): 198A
• Max Continuous Operating Temperature: 110°C / 230°F

Mounting Application:

• J180 (3.15"): Replaces most small case styles using a 3.15" J180 saddle style mount (e.g., Hitachi, Lucas, Mitsubishi, most Yanmars)
• J180 (4"): Replaces most Volvo Penta alternators using a 4" J180 saddle-style mount
• N62: Replaces most Mercedes and BMW alternators, Mercedes Sprinter 1999 - 2006 alternators, Mercedes Sprinter Factory dual alternator 2007-Up Replacement
• N62 (Clutch Pulley): Mercedes Sprinter 1999 - 2006 alternators, Mercedes Sprinter Factory dual alternator 2007-Up Replacement - replaces Roadtrek Mercedes Dual alternator
• 1" - 2" Single Foot: Replaces most domestic styles using a single 1" or 2" mounting foot (e.g., Motorola, Prestolite)
• Vortec (GM): 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.)
• Ford Transit: Replaces Ford Transit alternators 3.5L & 3.7L Gas engines 2015-2022

Owner's Manual

Installation Instructions (1.88 MB)