Sierra Johnson Evinrude Cylinder Timer Base Ignition Repair Parts

Sierra timer bases are replacement ignition timer bases (also called trigger assemblies or timer base assemblies) for Johnson/Evinrude outboard engine ignition systems. The timer base is part of the ignition system. It works with the power pack to time the spark for each cylinder. Sierra offers them as aftermarket replacements for OEM and CDI Electronics units.

Key Features:

• Aftermarket replacement timer base for Johnson/Evinrude outboard ignition systems
• Made to replace the original timer base, so it can restore ignition performance
• Cross-referenced to OEM Johnson/Evinrude and CDI Electronics part numbers
• Backed by Sierra's long record in marine engine parts

When a timer base fails, the engine can misfire, run poorly, or lose spark. The failed unit can also damage the power pack. Replacing a worn or faulty timer base helps restore reliable starting and smooth running. Each part number in this product line is made for a specific engine application, so choose the variant that matches your engine.