Arco Starting & Charging 4033 Zeus A275L Vortec Marine Alternator 275A 12V

The Arco Zeus A275L Vortec Alternator delivers exceptional power output in a compact design, engineered specifically for marine, RV, military, and commercial applications. This high-performance 275-amp alternator rapidly charges large battery banks while maintaining the coolest operating temperatures in its class, running 8-20% cooler than competing alternators.

Key Features:

• Maximum output of 311 amps (cold, 9,000 RPM) with sustained cruising output of 227 amps
• Optimized for excellent performance at idle speeds - 198 amps sustained at 3,000 RPM
• Advanced thermal management with heat-shedding Cerakote or E-coat finish, external rectifier placement, and dual cooling fans
• External regulation only - includes terminal block and P-Type harness (external regulator required)
• Compatible with Arco Zeus Bluetooth alternator regulator for maximum performance and lithium battery charging
• SAE J1171 certified and Made in the USA

Technical Specifications:

• Voltage: 12V with 14.1V output (default)
• Field Type: P-Type (external regulation)
• Stator: 138mm, 16 rotor poles
• Weight: 14.9 lbs (6.7 kg)
• Cut-in RPM: 1,061 alternator RPM
• Maximum RPM: 19,000
• Pulley: 49K6 (6-groove, 49mm) on 17mm diameter shaft
• Diodes: 6 positive, 6 negative, 50A rated avalanche
• Maximum continuous operating temperature: 230°F (110°C)
• Battery post: M8 thread, side mount

Mounting Application:

• Direct replacement for Mando-type alternators using Vortec/GM pad mounting feet
• Compatible with many Mercruiser and Volvo Penta marine engines including 3.0GLM, 3.0GLP, 4.3GXi, 5.7GiL, and 5.7GXiL models on GM blocks

This premium alternator reduces or eliminates the need for a generator by creating substantial additional power directly from your engine, making it ideal for vessels with high electrical demands.