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134-9021-4 is an ignition trigger built for 125 HP 4cyl Mercury/Mariner 1994-96 models with Serial # OD283222 thru OG437999. Used to correct misfire, timing loss, or intermittent trigger signal problems.
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Part #: 134-9021-4
Mercury125 HPTriggerWeight: 1 lb
3.0 / 5  (30 votes)
134-9021-4 is an ignition trigger built for 125 HP 4cyl Mercury/Mariner 1994-96 models with Serial # OD283222 thru OG437999. Used to correct misfire, timing loss, or intermittent trigger signal problems.
List Price: $140.99
Your Price: $125.95
Normally In Stock

In Stock items ship same day if ordered before 3PM CST (excluding weekends and holidays)

Replaces OEM#'s

99021A2, 99021A6, 99021K2

Product Details

Designed for reliable ignition synchronization, this marine trigger helps coordinate spark timing events across the engine's RPM range.

Marine-grade insulation materials and sealed pickup circuitry help protect the trigger assembly from humidity, heat cycling, and electrical interference.

Features

  • Supports accurate CDI timing events
  • Marine-grade sealed construction
  • Vibration-resistant electronic components
  • Designed for stable spark synchronization

Common Symptoms of a Failing Trigger

  • RPM instability under load
  • Hard starting conditions
  • Engine misfire or hesitation
  • Loss of spark synchronization

Need Fitment Help?

Tell us your brand, horsepower, and part number. We can help verify fitment before you order.

Support PDF files appear on this page when available.