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174-8778K1 is an ignition stator for 115 HP 4cyl Mercury/Mariner 1983-93 models with Serial # OC100000 thru OD252460. Generates ignition voltage needed for consistent spark delivery.
Representative image shown. Brand or product appearance may vary slightly depending on current inventory.

Part #: 174-8778K1
Mercury115 HPStatorWeight: 4 lb
3.0 / 5  (23 votes)
174-8778K1 is an ignition stator for 115 HP 4cyl Mercury/Mariner 1983-93 models with Serial # OC100000 thru OD252460. Generates ignition voltage needed for consistent spark delivery.

Notes:

Models with 9amp charging system. Not for use with flywheels having bolted in magnets. Compatible with voltage regulator or rectifier.

List Price: $491.49
Your Price: $473.65
Normally In Stock

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

Replaces OEM#'s

398-8778A6, 398-8778A10, 398-8778A16, 398-8778A17, 398-8778A18, 398-8778A21, 398-8778A22, 398-8778A23, 398-8778A24, 398-8778A25, 398-8778A26, 398-8778A27, 398-8778A28, 398-8778A29, 398-818535A3, 398-818535A5, 398-818535A8, 398-818535A9, 398-818535A10, 398-818535A13, 398-818535A14

Product Details

This replacement stator is designed to support stable ignition output by converting flywheel rotation into controlled electrical energy for the ignition circuit. The design priorities are especially important on Mercury/Mariner applications where ignition stability depends on clean stator output.

Stator Design

  • Precision-wound copper coils are used to promote efficient voltage generation and stable output.
  • The stator body is designed to maintain proper coil alignment under continuous flywheel rotation.
  • Heavy-duty winding insulation helps prevent shorting between coil layers during extended operation.
  • The coil assembly is built to resist breakdown from heat, oil mist, humidity, and repeated thermal expansion.

Operating Features

  • Designed for use in wet, hot, and vibration-heavy marine engine compartments.
  • Engineered to meet OEM-style electrical output characteristics.
  • Supports dependable starting by delivering the voltage needed by the ignition module.
  • Supports smooth acceleration by helping the ignition system maintain consistent energy.

Common Symptoms of Stator Failure

  • Engine misfire under load
  • High-rpm breakup
  • Random cylinder drop-out
  • Weak or intermittent spark
  • No-start conditions

Always compare resistance and peak-voltage readings to the correct service specifications when diagnosing a suspected stator failure.

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.