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134-9021-3 fits 70 HP 3cyl Mercury/Mariner 1987-93 models with Serial # OA996142 thru OD283222 as an ignition trigger. Restores the signal path needed for accurate cylinder firing.
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Part #: 134-9021-3
Mercury70 HPTriggerWeight: 1 lb
4.0 / 5  (11 votes)
134-9021-3 fits 70 HP 3cyl Mercury/Mariner 1987-93 models with Serial # OA996142 thru OD283222 as an ignition trigger. Restores the signal path needed for accurate cylinder firing.
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.

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

Features

  • Marine-grade sealed construction
  • Precision ignition timing signal generation
  • Designed for stable spark synchronization
  • Helps support dependable throttle response

Common Symptoms of a Failing Trigger

  • RPM instability under load
  • Engine misfire or hesitation
  • Hard starting conditions
  • 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.