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For 50 HP 3cyl Mercury/Mariner 1991-97 models with Serial # OD000750 thru OG589999, 134-9021-3 is an ignition trigger. Helps restore proper timing input for smooth engine operation.
Representative image shown. Brand or product appearance may vary slightly depending on current inventory.

Part #: 134-9021-3
Mercury50 HPTriggerWeight: 1 lb
4.0 / 5  (24 votes)
For 50 HP 3cyl Mercury/Mariner 1991-97 models with Serial # OD000750 thru OG589999, 134-9021-3 is an ignition trigger. Helps restore proper timing input for smooth engine operation.
List Price: $153.99
Your Price: $139.95
Normally In Stock

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

Replaces OEM#'s

99021A3, 99021A5, 99021A9, 99021A13, 99021A15, 99021A16

Product Details

This trigger assembly is engineered to provide accurate ignition timing signals for dependable spark sequencing and throttle response.

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

Features

  • Designed for stable spark synchronization
  • Supports accurate CDI timing events
  • Marine-grade sealed construction
  • Helps support dependable throttle response

Common Symptoms of a Failing Trigger

  • Ignition timing drift after warm-up
  • Engine misfire or hesitation
  • Loss of spark synchronization
  • Intermittent ignition timing problems

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.