Sierra 18-99483 Trigger Disc for Mercury Mariner 6-Cylinder Outboard Engines

The Sierra 18-99483 is a precision-engineered trigger disc designed specifically for Mercury Mariner 6-cylinder outboard engines. This critical ignition component works in conjunction with the stator and flywheel to provide accurate timing signals to the engine's electronic ignition system.

Key Features:

• Direct replacement for Mercury/Mariner OEM trigger discs
• Precision-manufactured to OEM specifications for reliable timing signals
• Designed specifically for 6-cylinder outboard applications
• Ensures proper ignition timing and engine performance
• Durable construction for marine environment reliability

This trigger disc is an essential component of the ignition system, generating the electronic pulses that determine spark timing. Proper installation is critical for optimal engine performance, smooth running, and fuel efficiency. Compatible with various Mercury Mariner 6-cylinder outboard models equipped with electronic ignition systems.