Sierra 18-99441 Trigger Assembly for Mercury Mariner 2-Cylinder Outboard

The Sierra 18-99441 Trigger Assembly is a precision-engineered replacement ignition component designed for 2-cylinder Mercury and Mariner outboard motors. This trigger works in conjunction with the flywheel and stator to generate critical timing signals that control ignition timing and spark plug firing.

Key Features:

• Premium aftermarket replacement for Mercury Mariner 2-cylinder outboards
• Engineered to meet or exceed OEM specifications for reliable performance
• Generates precise timing signals for the ignition system
• Constructed with marine-grade materials for durability in harsh saltwater environments
• Direct replacement for factory trigger assembly

Sierra is a trusted name in marine aftermarket parts, providing premium-quality replacements for thousands of marine components. This trigger assembly is designed to restore proper ignition timing and engine performance when the original trigger fails or becomes unreliable. Proper ignition timing is essential for smooth engine operation, reliable starting, and optimal fuel efficiency.