Zeus A225s Vortec with Terminal Block | Arco Marine 4017 Fresh Stock

12V, 225A high-output alternator engineered for marine, RV, military, and commercial applications

Replaces Mando-type alternators using Vortec/GM pad mounting feet on Mercruiser and Volvo Penta 3.0GLM, 3.0GLP, 4.3GXi, 5.7GiL, 5.7GXiL marine engines (GM blocks)

External regulation (EX) or Internal/External (IE) regulation options available

Rapidly charges large battery banks and can reduce the need for a generator by producing additional power directly from your engine

Optimized for performance even at idle speeds, delivering sustained output for demanding electrical systems

14.1V default output voltage

Max output: 254A (cold, 9,000 RPM)

Sustained cruising output: 187A (hot, 6,000 RPM)

Sustained idle output: 157A (hot, 3,000 RPM)

Cut-in speed: 1,061 alternator RPM

Maximum alternator RPM: 19,000

Rotor poles: 16

Stator size: 130mm

Frame size: Small

Weight: 12 lbs (6.7 kg)

Side battery post with M8 thread

Standard pulley: 49mm 6-groove (49K6)

Pulley mount: 17mm diameter shaft, 25mm long, threaded M17 x 1.5

Includes pulley hardware: M17 x 1.5 x 24mm nut with 18mm ID x 29mm OD washer

Diodes: 6 positive and 6 negative, 50A rated, avalanche type

Runs 8–20% cooler than standard alternators thanks to:

• Heat-shedding coatings

• Rectifier mounted externally on the housing

• Dual cooling fans

E-Coat or Cerakote finish absorbs less heat, keeping the unit cooler and sustaining amperage output under heavy load