Shop ARCO Marine 20800 alternator with 70A output, internal fan, and 65mm serpentine pulley. Ideal for MerCruiser-powered boats needing dependable charging.
9 in stock
9 in stock
The ARCO Marine 20800 Premium Replacement Alternator is a 12-volt, 70-amp marine charging system engineered for MerCruiser 4.3L through 8.2L engines from 1998 and newer. This alternator includes a 65mm multi-groove serpentine pulley, internal cooling fan, and OEM-style mounting configuration designed to match factory charging performance while maintaining marine-grade durability. || Built for MerCruiser-powered runabouts, cruisers, and performance boats, the 20800 helps maintain battery charge for engine electronics, navigation equipment, lighting systems, and onboard accessories. The 70-amp output supports demanding electrical loads while the internal fan improves cooling efficiency during extended operation. || ARCO manufactures the 20800 as a premium replacement for Mercury, Delco, Sierra, and Protorque alternators, simplifying service and installation. Its direct-fit design reduces modification requirements and restores reliable charging performance for compatible MerCruiser applications. Upgrade your marine electrical system with an OEM-spec replacement built specifically for marine engine environments.
| Brand | ARCO Marine |
|---|---|
| Model | 20800 |
| MPN | 20800 |
| Product Type | Alternator |
| Material | Metal Housing |
| Finish Color | Natural metal |
| Dimensions | 9 x 7 x 7 in |
| Weight (lb) | 8 lb |
| Load Capacity | 70 Amp |
| Drawer Count | Not Published |
| Drawer Type | Not Published |
| Lock Type | Not Published |
| Mount Type | Saddle mount |
| Installation | Direct replacement |
| Compatibility | MerCruiser 4.3L-8.2L |
| Use Case | Marine Charging |
| Warranty | 1 Year Limited |
| Country of Origin | United States |
| Series | Premium Replacement |
| UPC | 693006008172 |
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