Arco Starting & Charging 20100 Replacement Inboard Marine Alternator Alternators

The Arco Starting & Charging 20100 is a high-performance replacement alternator designed for marine diesel engine applications. This self-exciting alternator features an internal voltage regulator for simplified installation and reliable charging performance in harsh marine environments.

Key Features:

• Self-exciting internal regulator eliminates the need for external voltage regulation
• Negative ground configuration for compatibility with most marine electrical systems
• Simple 1-wire connection for easy installation and minimal wiring
• Single groove pulley for standard belt drives
• Compact 2-inch mounting foot for secure installation in tight engine compartments
• Designed specifically for marine diesel engine applications

This alternator provides dependable charging power for batteries and onboard electrical systems. The self-exciting design and integrated regulator make it an ideal replacement for aging or failed alternators on inboard diesel engines, offering straightforward installation with minimal electrical modifications.