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114-7778 is an ignition switch box built for 135 HP Mercury/Mariner 1985-99 models with Serial # OA904646 thru OG960499. Restores spark control where the original module has failed or become unreliable.
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Part #: 114-7778
Mercury135 HPSwitch BoxWeight: 2 lb
4.0 / 5  (19 votes)
114-7778 is an ignition switch box built for 135 HP Mercury/Mariner 1985-99 models with Serial # OA904646 thru OG960499. Restores spark control where the original module has failed or become unreliable.
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

This switch box is engineered to manage CDI ignition timing and spark sequencing for dependable ignition performance throughout the engine's operating range.

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

Features

  • Supports dependable ignition timing operation
  • Helps maintain reliable spark delivery under load
  • High-energy CDI ignition switching design
  • Marine-grade sealed electronic construction

Common Symptoms of a Failing Switch Box

  • Random cylinder firing issues
  • Hard starting conditions
  • Intermittent spark or ignition drop-out
  • Loss of top-end RPM

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.