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114-7778 fits 50 HP 3cyl Mercury/Mariner 1984-90 models with Serial # 6428681 thru OD000749 as an ignition switch box. Helps correct weak spark, misfire, or intermittent no-spark conditions.
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Part #: 114-7778
Mercury50 HPSwitch BoxWeight: 2 lb
4.0 / 5  (20 votes)
114-7778 fits 50 HP 3cyl Mercury/Mariner 1984-90 models with Serial # 6428681 thru OD000749 as an ignition switch box. Helps correct weak spark, misfire, or intermittent no-spark conditions.
List Price: $274.99
Your Price: $120.10
Normally In Stock

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

Replaces OEM#'s

332-5524, 332-7778, 332-7778A1, 332-7778A3, 332-7778A5, 332-7778A6, 332-7778A9, 332-7778A12

Product Details

Designed for reliable capacitor discharge ignition control, this marine switch box helps coordinate spark delivery and stable combustion under varying load conditions.

Sealed marine-grade circuitry and vibration-resistant epoxy encapsulation help protect the switch box from moisture intrusion, corrosion, and damaging engine vibration.

Features

  • Helps maintain reliable spark delivery under load
  • High-energy CDI ignition switching design
  • Vibration-resistant internal circuitry
  • Designed for stable spark sequencing

Common Symptoms of a Failing Switch Box

  • Intermittent spark or ignition drop-out
  • Random cylinder firing issues
  • Hard starting conditions
  • Engine misfire under acceleration

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.