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Sierra 118-99397 CDM Trigger for Mercury Outboard Engines

Manufacturer

Sierra

<p>For nearly six decades, Sierra has established itself as one of the marine industry's most trusted names in aftermarket engine and drive parts. Founded as a specialized marine parts manufacturer, Sierra has grown into a comprehensive supplier of replacement components, instrumentation, and accessories for both recreational and commercial boating applications. Operating from their 300,000-square-foot distribution center in Litchfield, Illinois, Sierra serves boat owners and marine technicians worldwide with an extensive catalog of parts engineered specifically for the harsh saltwater environment.</p><h3>Marine Engine Excellence</h3><p>Sierra's reputation was built on delivering precision-engineered internal engine components and drive system parts that meet or exceed OEM specifications. Their <a href="/7570-sierra-engine-gasket-set-5404">engine gasket sets</a> provide critical sealing solutions for inboard and outboard motors, while their <a href="/7570-sierra-engine-complete-assembly-15341">engine complete assemblies</a> offer comprehensive replacement options for major overhauls. Each component undergoes rigorous testing to ensure reliability in demanding marine conditions, from corrosion resistance to temperature cycling performance.</p><h3>Instrumentation and Monitoring Systems</h3><p>Accurate instrumentation is essential for boat operators to monitor engine health and prevent costly breakdowns on the water. Sierra's comprehensive line of <a href="/7570-sierra-gauges-200483">gauges</a> includes everything from fuel pressure and temperature indicators to voltmeters and trim gauges, all designed with marine-grade materials that withstand vibration, moisture, and UV exposure. Their <a href="/7570-sierra-tachometer-gauge-1488">tachometer gauges</a> deliver precise RPM readings critical for optimizing engine performance and fuel efficiency. Supporting these instruments, Sierra's <a href="/7570-sierra-gauge-resistor-47908">gauge resistors</a> ensure proper signal conditioning and accurate readings across various sensor types and engine configurations.</p><h3>Expanded Product Portfolio</h3><p>In 2022, Sierra significantly broadened its scope beyond traditional marine engine parts to encompass a wider range of boating accessories and even outdoor power equipment components. This strategic expansion brought established marine brands like Shields and Moeller under the Sierra umbrella, creating a one-stop resource for marine maintenance and replacement parts. The company now offers fuel systems, electrical components, battery charging solutions, and NMEA electronics alongside their traditional engine parts lineup.</p><h3>Quality Backed by Industry-Leading Warranties</h3><p>What sets Sierra apart in the crowded aftermarket marine parts market is their commitment to standing behind every component they manufacture. Their warranty coverage extends beyond simple part replacement—it includes shop labor, haul-out fees, towing charges, and related incidental costs should a warrantied part fail. This comprehensive protection reflects the company's confidence in their manufacturing processes and quality control standards. For boat owners facing repairs far from shore or mechanics working on customer vessels, this peace of mind is invaluable. Whether you're maintaining an outboard motor, rebuilding an inboard engine, or upgrading your boat's instrumentation, Sierra's decades of marine industry experience and commitment to quality make them a reliable choice for keeping your vessel running at peak performance.</p>

Part Number

118-99397
06/02/2036 10:36 PM
Sale Price

$183.24

1 left at this price

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Usually delivered within 2 days

free shipping

FREE SHIPPING

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 118-99397 is a replacement CDM (Capacitor Discharge Module) Trigger designed for Mercury outboard engines. Also known by the cross-reference number 18-99397, this ignition trigger precisely signals the CDM module to fire the spark plug at the correct moment in the engine's firing cycle, ensuring reliable ignition timing and optimal engine performance.

Sierra is a trusted name in marine aftermarket parts, manufacturing ignition components built to meet or exceed OEM specifications. This CDM trigger is engineered for a direct-fit replacement, making installation straightforward and dependable for marine technicians and boaters alike.

Key Features:

  • Direct replacement CDM trigger for Mercury outboard engines
  • Meets or exceeds OEM specifications for fit, form, and function
  • Critical ignition system component for proper spark timing
  • Cross-references Sierra part number 18-99397
  • Manufactured by Sierra, a leading marine aftermarket parts supplier

Restoring proper ignition function is essential to engine reliability on the water. The Sierra 118-99397 CDM trigger delivers the quality and precision needed to keep your Mercury outboard running at its best.

wonderful product

Easy peasy - Found what I wanted with free shipping.

Fast and great customer service

just placed the order, ask me later

This item will be very helpful.

Had what I needed in stock and shipped it out quickly. Would have been nice to have the option to ship on my account and get it sooner. Overall good experience and I will come back if I need similar items.

I placed my order and it was received in two days. The price was best I found on internet. Shipping was priced fairly.

Was grate, the only a prefer no charge for the delivery on regular shipment

Awesome experience, next level customer support.

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