Sierra 18-5366 Trigger Assembly for Mercury Mariner 2-Cylinder Outboards

The Sierra 18-5366 trigger assembly is a precision replacement ignition component designed for Mercury and Mariner 2-cylinder outboard engines. This trigger unit plays a critical role in the ignition system by sending timing signals to the CDI/power pack, ensuring proper spark timing for optimal engine performance.

Key Features:

• Direct replacement for Mercury/Mariner OEM trigger assemblies
• Designed specifically for 2-cylinder outboard applications
• Precision-engineered to meet or exceed OEM specifications
• Critical component for reliable ignition timing and engine operation
• Manufactured by Sierra, a trusted name in marine replacement parts

This trigger assembly is essential for maintaining proper ignition system function. A faulty trigger can cause misfiring, poor performance, or prevent the engine from starting altogether. Sierra marine parts are engineered to provide reliable, long-lasting performance in demanding marine environments.