Sierra Trigger for Mercury Mariner 2-Cylinder Outboards, Part Number 18-99441

The Sierra 18-99441 is an ignition trigger built for Mercury and Mariner 2-cylinder outboard engines. The trigger is a core component of the outboard's ignition system, working with the stator and switch box to signal spark timing to each cylinder as the flywheel rotates. Replacing a worn or failed trigger restores consistent spark timing, which is essential for reliable starting, smooth idle, and correct engine performance across the rpm range.

This trigger is sold under Sierra part number 18-99441 and is listed within Sierra's Mercury Outboard Stators & Triggers category, so it is cataloged specifically as an ignition-system replacement part for Mercury and Mariner 2-cylinder outboard applications. Boat owners and marine technicians use parts like this when diagnosing no-spark, intermittent spark, or misfire conditions traced back to the ignition trigger rather than the coil, stator, or switch box.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99441
• Product Name: Mercury Mariner Trigger - 2 Cyl.
• Category: Mercury Outboard Stators & Triggers
• Weight: 0.6 pounds
• UPC: 808282394790

Frequently Asked Questions

What engines does the Sierra 18-99441 trigger fit? Sierra part number 18-99441 is cataloged as a trigger for Mercury and Mariner 2-cylinder outboard engines.

What part is Sierra 18-99441? It is an ignition trigger, the component that signals spark timing to the ignition system as the outboard's flywheel rotates.

How much does the 18-99441 trigger weigh? The Sierra 18-99441 trigger weighs 0.6 pounds.

Is this trigger sold by Sierra or a third-party brand? This trigger is a Sierra branded part, listed under Sierra part number 18-99441.

What symptoms indicate a failing ignition trigger like the 18-99441? A worn or failed trigger on a Mercury or Mariner 2-cylinder outboard commonly causes no-spark, intermittent spark, or misfire conditions traced to the ignition system.

Does the 18-99441 work with 4-cylinder or 6-cylinder Mercury outboards? No, Sierra 18-99441 is specifically cataloged for Mercury and Mariner 2-cylinder outboard engines.

What category does Sierra 18-99441 fall under? Sierra 18-99441 is listed in the Mercury Outboard Stators & Triggers category.

What is the UPC for the Sierra Mercury Mariner trigger? The UPC for Sierra part 18-99441 is 808282394790.

Does the trigger work with the stator and switch box as a system? Yes, the ignition trigger works together with the stator and switch box to control spark timing on a Mercury or Mariner 2-cylinder outboard.

Is the Sierra 18-99441 trigger a direct replacement part? Sierra 18-99441 is cataloged as a replacement ignition trigger for Mercury and Mariner 2-cylinder outboard engines.