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For 80 HP 3cyl Mercury/Mariner 1987-93 models with Serial # OA996142 thru OD283221, 134-9021-3 is an ignition trigger. Helps diagnose and correct ignition timing faults related to trigger failure.
Representative image shown. Brand or product appearance may vary slightly depending on current inventory.

Part #: 134-9021-3
Mercury80 HPTriggerWeight: 1 lb
4.0 / 5  (34 votes)
For 80 HP 3cyl Mercury/Mariner 1987-93 models with Serial # OA996142 thru OD283221, 134-9021-3 is an ignition trigger. Helps diagnose and correct ignition timing faults related to trigger failure.
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

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

  • Supports accurate CDI timing events
  • Marine-grade sealed construction
  • Designed for stable spark synchronization
  • Precision ignition timing signal generation

Common Symptoms of a Failing Trigger

  • Engine misfire or hesitation
  • Hard starting conditions
  • Loss of spark synchronization
  • Ignition timing drift after warm-up

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.