Sierra Qualifies for Free Shipping Sierra Trigger Mercury #18-99438

Sierra Trigger Mercury #18-99438

$136.01 $168.84 -20% OFF

Sierra Trigger Mercury #18-99438

$136.01 $168.84 -20% OFF

Sierra Trigger Mercury #18-99438

$136.01 $168.84 -20% OFF
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Brand: Sierra

SKU: SIE-18-99438

UPC: 808282394691

More about this item

Sierra 18-99438 Ignition Timer Base

The Sierra 18-99438 is a precision-engineered ignition trigger (timer base) designed for Mercury SportJet and Force outboard engines. This critical ignition component generates the timing signals that control spark delivery to the engine's cylinders, ensuring proper ignition timing for optimal engine performance, smooth operation, and reliable starting across all operating conditions.

The ignition trigger works in conjunction with your engine's ignition system to precisely time spark delivery based on engine speed and position. When the trigger fails or malfunctions, you may experience symptoms including no spark, intermittent spark, misfiring, rough running, poor acceleration, difficulty starting, or complete engine failure. Replacing a faulty trigger restores proper ignition timing and returns your engine to reliable operation.

Manufactured to meet or exceed OEM specifications, this Sierra trigger provides the quality, precision, and reliability needed for trouble-free ignition system performance. The component is engineered to withstand the demanding conditions of marine engine operation, including vibration, heat, moisture, and electrical stress. Using quality replacement parts like this Sierra trigger ensures your ignition system functions properly and your engine delivers the performance and reliability you expect.

This trigger is designed as a direct replacement for the original equipment, ensuring proper fit and function without modification. The precise manufacturing tolerances ensure accurate timing signal generation, which is critical for maintaining proper engine performance, fuel efficiency, and emissions. Whether you're troubleshooting ignition problems or performing preventive maintenance, this Sierra trigger provides the quality needed to keep your engine running strong.

Compatibility:

  • Mercury SportJet: 1995 (120HP)
  • Force: 1991-1995 (120HP)

Interchange Numbers:

  • CDI: 134-7029-4
  • Mercury Marine: 817029A11
  • Mercury Marine: 817029A4

Key Features:

  • Precision ignition trigger (timer base)
  • Direct OEM replacement
  • Ensures proper ignition timing
  • Restores reliable engine operation
  • Quality construction for marine environments
  • Critical for starting and performance

Normalized SKU: 1899438
UPC Code: 808282394691

Qualifies for Free Shipping
This item qualifies for free shipping when the order is over $149
$136.01 $168.84 -20% OFF
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