Arco Starting & Charging 20840 Mercury Outboard Alternator 12V 50 Amp

The Arco Starting & Charging 20840 is a high-output 12-volt, 50-amp alternator designed specifically for select 2.5L Mercury outboard engines. This direct-fit replacement alternator features an internal cooling fan for reliable operation and includes a multi-groove serpentine pulley for efficient belt engagement.

Key Features:

• 12-volt system with 50-amp output capacity
• Internal cooling fan for heat dissipation
• 2-inch mounting foot for secure installation
• Multi-groove serpentine pulley included
• Complete with wire harness and plug connector
• Direct replacement for original equipment

Replaces OEM Part Numbers:

• Delco: 8600515, 19020703, 19020706
• Mercury: 8M0064021, 8M6000804, 834832, 875285T1

Arco marine alternators are built to withstand harsh marine environments and provide dependable charging performance for your Mercury outboard's electrical system. This alternator arrives ready to install with all necessary hardware and connections included.