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134-4512-3 is a replacement ignition trigger used on 40 HP 3cyl Jet Mercury/Mariner 1998-2005 models with Serial # OG590000 thru OT979999. Restores the signal path needed for accurate cylinder firing.
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Part #: 134-4512-3
Mercury40 HPTriggerWeight: 1 lb
4.0 / 5  (30 votes)
134-4512-3 is a replacement ignition trigger used on 40 HP 3cyl Jet Mercury/Mariner 1998-2005 models with Serial # OG590000 thru OT979999. Restores the signal path needed for accurate cylinder firing.
List Price: $132.99
Your Price: $121.05
Normally In Stock

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

Replaces OEM#'s

854512T, 834520T, 855746A12

Product Details

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

The assembly uses vibration-resistant electronic components and insulated signal wiring designed for dependable timing performance in marine applications.

Features

  • Precision ignition timing signal generation
  • Supports accurate CDI timing events
  • Designed for stable spark synchronization
  • Helps support dependable throttle response

Common Symptoms of a Failing Trigger

  • Loss of spark synchronization
  • Ignition timing drift after warm-up
  • Intermittent ignition timing problems
  • Hard starting conditions

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.