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CDI Electronics 174-8778K1 Mercury/Mariner Stator 9 Amp 2/3/4 Cylinder

Manufacturer

Cdi Electronics

<h3>About CDI Electronics</h3><p>Since its founding in 1982, <strong>CDI Electronics</strong> has grown from a small outboard repair shop into one of the most trusted names in marine ignition and electrical components. The company originally operated under the name Rapair Incorporated, spending years repairing outboard engine ignition systems and accumulating deep, hands-on knowledge of exactly how and why marine electrical systems fail. That hard-won expertise laid the groundwork for a pivotal shift in 1995, when CDI began designing and manufacturing its own line of replacement components — a move that gave birth to the CDI Electronics brand the marine industry relies on today.</p><p>Headquartered in Huntsville, Alabama, CDI Electronics designs and builds its products domestically, maintaining tight control over engineering and quality standards. The result is a catalog of components that offer a compelling alternative to expensive OEM parts without compromising on durability or performance — a critical consideration in the demanding marine environment, where corrosion, moisture, vibration, and extreme temperatures can take a relentless toll on electrical systems.</p><h3>A Complete Marine Ignition Solution</h3><p>CDI Electronics' product lineup spans the full spectrum of marine ignition and charging needs. Their extensive range of <a href="/7290-cdi-electronics-ignition-repair-parts-200570">ignition repair parts</a> includes ignition coils, switch boxes, triggers, rectifiers, voltage regulators, and wiring harnesses — essentially every component that keeps an outboard's spark and charging system firing correctly. Whether a technician is rebuilding a Johnson/Evinrude, Mercury/Mariner, or Yamaha powerhead, CDI's catalog is engineered to cover a remarkably wide range of makes, models, and model years.</p><p>On the charging side, CDI offers a strong selection of <a href="/7290-cdi-electronics-alternator-stator-10030">alternator stators</a> that are engineered to match OEM output specifications while standing up to the unique stresses of the marine environment. Stators are the heart of an outboard's charging and ignition power generation system, and CDI's focus on precision winding and materials means boaters and technicians can install with confidence. CDI also carries high-output XT-Series alternators designed specifically for performance inboard and wake boat applications where electrical demand at idle is especially high.</p><p>For engines that rely on capacitor discharge ignition architecture, CDI's lineup of <a href="/7290-cdi-electronics-ignition-power-pack-15557">ignition power packs</a> — including power packs and switch boxes — provide the critical energy storage and delivery that drives the ignition coils. These components are engineered to deliver consistent, reliable spark timing across the full RPM range, and CDI offers both standard-replacement and high-performance variants for a wide range of outboard applications.</p><h3>The M.E.D.S. Diagnostic Advantage</h3><p>Beyond replacement parts, CDI Electronics has developed the <strong>Marine Engine Diagnostic System (M.E.D.S.)</strong>, an advanced software-based diagnostic platform designed specifically for troubleshooting marine engines. M.E.D.S. works across most major outboard brands, giving marine technicians a unified tool for reading live engine data, pinpointing ignition faults, and reducing diagnostic guesswork — a significant advantage in a repair environment where misdiagnosis can be costly.</p><h3>Why Choose CDI Electronics?</h3><ul style="list-style:disc"><li>Over 40 years of focused marine ignition expertise dating back to 1982</li><li>Designed and manufactured in Huntsville, Alabama</li><li>Cost-effective OEM-quality alternatives backed by engineering know-how</li><li>Comprehensive coverage for major outboard brands including Mercury, Johnson, Evinrude, and Yamaha</li><li>Full-spectrum catalog: from individual coils and triggers to complete ignition kits and diagnostic systems</li></ul>

Part Number

174-8778K1
09/13/2036 2:47 AM
Sale Price

$297.52

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Product Details

The CDI Electronics 174-8778K1 is a high-quality replacement stator designed for Mercury and Mariner outboard engines. This 9-amp stator is engineered to provide reliable ignition system performance for 2, 3, and 4 cylinder applications, making it a versatile replacement solution for multiple engine configurations.

Key Features:

  • 9-amp output rating for consistent charging performance
  • Universal design replaces 2, 3, and 4 cylinder stators
  • Compatible with either voltage regulator or rectifier systems
  • Designed and manufactured for marine environments
  • Includes two 994-3981 adapters for proper installation
  • Marine-grade construction for corrosion resistance and durability

OEM Cross References: This stator replaces Mercury/Mariner part numbers 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, 398-818535A15, 18-5873, 18-5874, 749095, and F749095.

Important Installation Note: This stator is NOT compatible with flywheels having bolted-in place magnets. Do not use the red stator adapter with this replacement. CDI Electronics backs this product with a 2-year limited warranty covering defects in material and workmanship when installed by a professional marine technician.

Products specifications

OEM Number

398-8778 A6, A10, A16, A17, A18, A21, A22, A23, A24, A25, A26, A27, A28, A29. 398-818535 A3, A5, A8, A9, A10, A13, A14, A15, 749095, F749095

The system is very user friendly

I was very happy with the service

Easy to order great price

Ordering was easy and simple. I like that

great experience.

Great product great price great delivery

Order came in faster than I thought and packaged well.

QUICK &amp; EASY

Great fast service

part easy to find and the process was good

Lowest price i could find

Everything has been quick and easy

Quick and easy.

Grate

quick and painless with very good pricing

Great price on my item. Order placed and shipped from manufacturer very quickly. Anxiously awaiting delivery.

I received my Borgeson steering shaft today for my 1990 dodge 1st gen. This is where I found the lowest price for the product. I was also very pleased in the speedy delivery. I will definitely use this company again.

Not one issue at all

Great prices fast shipping bookmarked website!

Ordering was easy and hoping it ships as fast. Price was great.

Product was as described. Came very quickly...thanks.

shipping discount pop-up (2x) was annoying.

GREAT deals you should be more up front about shipping delays and how long it will take to get your products other than that great overall

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