ARCO Marine Premium Replacement Alternator w/Single Groove Pulley - 12V, 55A

A reliable and high-performance solution for your marine electrical needs, our Premium Replacement Alternator with Single Groove Pulley ensures your boat's electrical systems run smoothly. Designed specifically to fit late model Mercruiser engines, this 12V, 55A alternator features an internal regulator and a sturdy 2-inch mounting foot for secure installation. The included single groove pulley guarantees optimal power generation for your marine adventures.

Key Features

• Engineered for superior performance and reliability in marine environments
• Manufactured with precision and high-quality materials to meet demanding standards
• Exceeds OEM performance specifications for dependable power output

Specifications

Warranty Information

Our alternators are backed by a comprehensive warranty to ensure your peace of mind. When properly installed, all ARCO products are warrantied against defects in materials and workmanship for:

• 12 months for leisure use
• 90 days for commercial or racing applications

Extend your coverage with an additional year of warranty on rotating electric ARCO products, including Tilt/Trim Motors, Alternators, Outboard Starters, and Inboard Starters. Simply register your product within 30 days of purchase by visiting arcomarine.com/product-registration.

Compatibility

This alternator is designed to replace the following models:

• MARINE POWER Alternator 1210-000
• MERCURY Alternator 12449
• MERCURY Alternator 78403A1
• MERCURY Alternator 78403A2
• MERCURY Alternator 817119A1
• MERCURY Alternator 817119A4
• MERCURY Alternator 92497A3
• MERCURY Alternator 98555
• MERCURY Alternator 98555A1
• SIERRA Alternator 18-5957
• SIERRA Alternator 18-5966

Note: This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.

Download the Quick Guide (PDF)

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.