Sierra 18-5890-1 Shift Assist Module Kit for 4/6/8 Cylinder Marine Engines

The Sierra 18-5890-1 Shift Assist Module Kit is designed to enhance shifting performance in marine applications with 4, 6, or 8 cylinder engines. This electronic module optimizes the shift sequence by momentarily reducing engine RPM during gear changes, resulting in smoother transitions and reduced stress on transmission components.

Key Features:

• Compatible with 4, 6, and 8 cylinder marine engines
• Reduces transmission shock during gear changes
• Momentarily interrupts ignition for smoother shifts
• Complete kit includes module and installation hardware
• Protects drivetrain components from shift-related wear
• Professional-grade Sierra marine quality

This shift assist module is particularly beneficial for high-performance applications and stern drive systems where smooth, reliable shifting is critical. The kit includes all necessary components for installation on compatible marine engine systems.