Arco Starting & Charging 4034 Zeus A275L High Output Marine Alternator with Regulator

The Arco Zeus A275L Vortec alternator delivers the highest power output in its size class, engineered specifically for demanding marine, RV, military, and commercial applications. This premium 12-volt alternator rapidly charges large battery banks while maintaining the coolest operating temperatures for sustained peak performance.

Key Features:

• Maximum output of 311 amps (cold, 9,000 RPM) with sustained cruising output of 227 amps
• Optimized for high performance at idle speeds—198 amps sustained at 3,000 RPM
• Runs 8-20% cooler than comparable alternators through advanced thermal management
• Heat-shedding Cerakote or E-coat finish absorbs less heat for sustained amperage delivery
• Dual cooling fans and exterior-mounted rectifier for superior heat dissipation
• Internal regulation standard with adapter for optional external regulation or Bluetooth control
• Compatible with lithium battery charging systems
• SAE J1171 certified and made in the USA

Technical Specifications:

• Voltage: 12V output (14.1V default regulation)
• Stator: 138mm with 16-pole rotor and large frame design
• Weight: 14.9 lbs (6.7 kg)
• Cut-in speed: 1,061 alternator RPM | Maximum speed: 19,000 RPM
• Diodes: 6 positive, 6 negative, 50A rated avalanche type
• Maximum continuous operating temperature: 230°F (110°C)
• Standard pulley: 6-groove, 49mm (49K6) on 17mm diameter shaft
• Battery connection: M8 threaded side-mount post

Application:

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

This alternator reduces or eliminates the need for a separate generator by maximizing power production from your engine. All mounting hardware included.