20102 - Arco Marine 12V 70A Alternator with Single Groove Pulley | Aztek Computers
29+Years
SKU: N3F7X318HR |  Mfg. Part: 20102  | UPC: 693006001128  | 
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20102 - Arco Marine 12V 70A Alternator with Single Groove Pulley

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$175.29  $236.64
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Product Overview

ARCO Marine 12V 70A Alternator with Single Groove Pulley

This high-performance replacement alternator is designed for Mercruiser and BRP-OMC applications. With a 12 Volt, 70 Amp capacity, it features self-excitation and ignition protection screens. The internal regulator ensures reliability, and the negative ground system simplifies installation with a 1-wire connection. This alternator includes a 2-inch mounting foot and comes equipped with a single groove pulley.

Warranty Information:

ARCO products are warranted against defects in materials and workmanship for 12 months for leisure use and 90 days for commercial or racing applications when properly installed. You can extend your warranty by registering your rotating electric ARCO product (Tilt/Trim Motors, Alternators, Outboard Starters, and Inboard Starters) within 30 days of purchase at arcomarine.com/product-registration.

Replaces:

MERCURY 32701
MERCURY 47456A1
MERCURY 56045
MERCURY 59755
MERCURY 69729
Sierra 18-5950

Note: This product cannot be returned to the original point of purchase. Please contact the manufacturer directly for issues or concerns.




Expert Overview

The ARCO Marine 12V 70A Alternator (part number 20102) is a replacement component designed for marine power systems. It provides a 12-volt, 70-amp output, suitable for maintaining battery charge and powering onboard electrical systems in compatible vessels. This unit is specifically engineered for Mercruiser and BRP-OMC applications. Key features include self-excitation, ignition protection screens, and an internal regulator, which contribute to its operational reliability. The alternator utilizes a negative ground system and simplifies installation with a 1-wire connection. It comes equipped with a single groove pulley and a 2-inch mounting foot, facilitating direct replacement in appropriate setups. This product is intended for IT and procurement professionals seeking a specified marine electrical component for fleet maintenance or system integration.

Technical Specifications

  • Engineered for optimal performance and durability
  • Precision manufacturing ensures high quality
  • Meets or exceeds OEM specifications before packaging

Product Details

  • Manufacturer:
  • Model Number:
  • ASIN:
  • UPC:
  • Condition:
  • Weight:
  • Dimensions:
  • Updated:
  • Added:
  • Country of Origin:
  • ARCO Marine
  • 20102
  • B0000AZ7BB
  • 693006001128
  • New
  • 12 lbs
  • 9 X 8 X 8
  • Jul 21, 2026
  • Mar 26, 2024
  • CHINA
Product Identifiers: Brand: Arco Marine • Part #: 20102 • UPC: 693006001128 • ASIN: B0000AZ7BB

Frequently Asked Questions

What applications is this alternator designed for?

This alternator is designed for Mercruiser and BRP-OMC applications. It replaces several MERCURY and Sierra part numbers, including MERCURY 32701, 47456A1, 56045, 59755, 69729, and Sierra 18-5950.

What are the key electrical specifications of this alternator?

The alternator provides a 12-volt output with a 70-amp capacity. It features self-excitation, an internal regulator, and a negative ground system with a 1-wire connection for simplified installation.

What physical components are included with the alternator?

The alternator includes a single groove pulley and a 2-inch mounting foot. It is designed for direct replacement in compatible marine engine systems.

What is the warranty period for this ARCO Marine alternator?

ARCO products are warranted against defects in materials and workmanship for 12 months for leisure use and 90 days for commercial or racing applications. The warranty can be extended by registering the product within 30 days of purchase.

20102 - Arco Marine 12V 70A Alternator with Single Groove Pulley

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$175.29