Sierra 18-99406 Timer Base for Johnson/Evinrude 3 Cylinder Outboard Engines

The Sierra 18-99406 Timer Base is a premium replacement ignition component designed specifically for Johnson and Evinrude 3-cylinder outboard engines. This timer base is a critical part of the ignition system, working in conjunction with the stator to provide precise spark timing for optimal engine performance.

Key Features:

• Direct replacement for multiple OEM part numbers including 581949, 582724, 583060, 583131, 583378, 584269, and 584562
• Replaces CDI part number 133-3378 for broad compatibility
• Includes white glide ring for smooth operation and reduced friction
• Designed for professional installation with detailed troubleshooting specifications
• Premium quality construction for extended service life
• Meets or exceeds OEM specifications

This timer base is an essential component for maintaining proper ignition timing and spark delivery in Johnson/Evinrude 3-cylinder outboard motors. Sierra is a trusted aftermarket manufacturer with over 50 years of experience producing quality marine engine components. Professional installation by a qualified marine mechanic is recommended for optimal performance and reliability.