ARCO Alternator with 50mm Multi-Groove Pulley

Description

The ARCO Premium Replacement Alternator with 50mm Multi-Groove Pulley is designed for MerCruiser 4.3L through 6.2L marine engines that use a 12V, 70A charging system. It provides a purpose-built replacement for the original alternator and includes the 50mm multi-groove serpentine pulley, reducing the number of components that must be transferred from the failed unit during installation.

An internal fan supports cooling during operation, while ARCO engineers and manufactures its alternators for marine performance and reliability. Each ARCO alternator must meet or exceed OEM performance requirements before it is boxed, making this unit appropriate for owners replacing an original charging component rather than adapting a generic automotive alternator.

Cross-reference coverage includes Delco 19020611 and 19020612, Mercury 863077T, Pleasurecraft RA097007, Sierra 18-6298, ProTorque PH300-0035, and MPParts ADR0298. Checking the original alternator number and engine application before installation is the best way to confirm fitment.

When properly installed, ARCO provides a 12-month warranty against defects in materials and workmanship for leisure use and 90 days for commercial or racing applications. Eligible ARCO rotating-electric products can receive an additional year of warranty when registered with ARCO within 30 days of purchase. For MerCruiser owners needing a 70A replacement with the correct serpentine pulley already installed, this alternator provides a direct marine-focused solution. Explore our full range of marine alternators.