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134-4512-3 fits 40 HP 3cyl Mercury/Mariner 1997-2005 models with Serial # OG590000 thru OT999999 as an ignition trigger. Supports consistent spark timing on compatible 2-stroke outboards.
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Part #: 134-4512-3
Mercury40 HPTriggerWeight: 1 lb
4.0 / 5  (7 votes)
134-4512-3 fits 40 HP 3cyl Mercury/Mariner 1997-2005 models with Serial # OG590000 thru OT999999 as an ignition trigger. Supports consistent spark timing on compatible 2-stroke outboards.
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.

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

Features

  • Vibration-resistant electronic components
  • Marine-grade sealed construction
  • Designed for stable spark synchronization
  • Precision ignition timing signal generation

Common Symptoms of a Failing Trigger

  • Intermittent ignition timing problems
  • Engine misfire or hesitation
  • Hard starting conditions
  • 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.