Sierra 18-99393 Trigger Assembly for Mercury Outboard Engines

The Sierra 18-99393 is a precision-engineered trigger assembly designed for Mercury outboard engine ignition systems. This critical ignition component works in conjunction with the stator and CDI unit to generate timing signals that control spark delivery, ensuring optimal engine performance and reliability.

Key Features:

• Engineered to meet or exceed OEM specifications for reliable performance
• Constructed with marine-grade components designed to withstand harsh saltwater environments
• Precision-manufactured trigger mechanism ensures accurate ignition timing
• Direct replacement for Mercury Marine OEM trigger assemblies
• Quality aftermarket alternative offering excellent value

Sierra is a trusted name in marine replacement parts, providing premium-quality aftermarket components for over 6,000 marine applications. This trigger assembly is manufactured to strict quality standards to deliver dependable ignition performance for your Mercury outboard engine.