ARCO 12V 55A Universal Alternator, Single Groove Pulley

Description

The ARCO 12V 55A Premium Replacement Universal Alternator is designed for a broad group of marine engine applications including Yamaha, Marine Power, Crusader, and systems replacing Motorola-style alternators. Its 1-inch mounting foot with three-ear adjustment gives installers additional positioning flexibility compared with a fixed-foot replacement, making it useful across several inboard charging configurations.

The alternator is internally regulated and includes a single-groove pulley. It also provides dedicated terminals for a tachometer, indicator light, remote battery sensing, and excitation. Those connections allow the charging system to integrate with common engine instrumentation and provide remote voltage sensing where supported by the installation.

ARCO engineers and manufactures its alternators for performance, reliability, and precise marine fitment. Every unit must meet or exceed OEM performance requirements before packaging. Listed replacement references include Crusader 39200, Westerbeke 39790, Yamaha 19-1400-10, and Sierra 18-6843.

The alternator carries ARCO’s 12-month leisure-use warranty and 90-day commercial or racing warranty when properly installed. Eligible rotating-electric ARCO products can receive an extra year of warranty coverage if registered within 30 days of purchase. For owners needing a versatile 55A marine alternator with multiple signal terminals and an adjustable mounting arrangement, this model provides a flexible replacement platform. Look through the rest of our marine alternators.