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114-7778 fits 140 HP Mercury/Mariner 1979-81 models with Serial # 5327663 thru 5669999 and 1992-99 Jet models with Serial # OD082000 thru OG960499 as an ignition switch box. Helps correct weak spark, misfire, or intermittent no-spark conditions.
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Part #: 114-7778
Mercury140 HPSwitch BoxWeight: 2 lb
3.0 / 5  (22 votes)
114-7778 fits 140 HP Mercury/Mariner 1979-81 models with Serial # 5327663 thru 5669999 and 1992-99 Jet models with Serial # OD082000 thru OG960499 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.

Heavy-duty electronic components and insulated internal circuitry are designed to withstand heat cycling, humidity, and harsh outboard operating conditions.

Features

  • Supports dependable ignition timing operation
  • Helps maintain reliable spark delivery under load
  • Designed for stable spark sequencing
  • Vibration-resistant internal circuitry

Common Symptoms of a Failing Switch Box

  • Sudden ignition failure after warm-up
  • Loss of top-end RPM
  • Hard starting conditions
  • Intermittent spark or ignition drop-out

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.