ARCO Marine Premium Replacement Alternator w/Single-Groove Pulley - 12V, 70A

Enhance the performance and reliability of your marine engine with our Premium Replacement Alternator. Designed specifically for Mercruiser 3.0L engines from 1999 and newer, this 12V, 70A alternator ensures your vessel’s electrical system runs smoothly, even in the most demanding conditions. Equipped with an internal fan and a single-groove pulley, it offers seamless integration and dependable power generation for your boating adventures.

Key Features

• Engineered for optimal performance and long-lasting reliability in marine environments
• Precision manufacturing ensures consistent quality and durability
• Meets or exceeds OEM specifications for superior performance
• Includes a single-groove pulley for easy installation
• Internal fan design promotes efficient cooling and extends alternator lifespan

Technical Specifications

Warranty Information

We stand behind the quality of our alternators. When properly installed, all ARCO products are backed by a warranty against defects in materials and workmanship for:

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

Extend your peace of mind by adding an extra year of warranty to your rotating electric ARCO product, including Tilt/Trim Motors, Alternators, Outboard Starters, and Inboard Starters. To qualify, register your product within 30 days of purchase at arcomarine.com/product-registration.

Compatible Replacement Parts

Note: This product cannot be returned to the original point of purchase. For any issues or concerns, please contact the manufacturer directly.

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.