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Sierra 18-5797 Trigger Assembly for Mercury Mariner 3-Cylinder Outboard

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

118-5797
06/03/2036 10:48 AM
Sale Price

$182.30

4 left at this price

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Usually delivered within 2 days

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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 18-5797 Trigger Assembly is a high-quality replacement ignition component designed for Mercury and Mariner 3-cylinder outboard engines. This critical electrical system component generates the timing signal for the ignition system, ensuring proper spark timing and reliable engine performance.

Key Features:

  • Engineered specifically for Mercury/Mariner 3-cylinder outboard engines (50, 60, 65, and 70 HP models from 1976-1995)
  • Direct OEM replacement that meets or exceeds original equipment specifications
  • Constructed to withstand the harsh marine environment with corrosion-resistant materials
  • Precision-engineered for accurate timing signal generation and reliable ignition performance
  • Easy installation as a direct bolt-in replacement for worn or failed trigger assemblies

Replaces OEM Part Numbers: Mercury Marine 96455A8, 96455A1, 68162A6, 68162A3; CDI 134-6453

Sierra is a trusted name in marine replacement parts with over 50 years of industry experience. All Sierra products are manufactured to meet rigorous quality standards and are backed by their industry-leading customer satisfaction warranty. This trigger assembly is an essential component for maintaining optimal engine performance and preventing ignition-related issues in your Mercury or Mariner outboard motor.

N/A

Received everything and it was well packaged. Thank you

Great! Very pleased. Customer service was great, parts actually showed up. Very good experience!

Everything went smoothly

So far so good

Part fit exactly, so now my motor runs great.

Easy ordering experience. I used PayPal and made it secure and seamless. The packaging was superb. The widget used to define the fitment was perfect - I have a '93 British SUV and its not always easy finding exact parts and the fact that it was a Bosch made it better.

Was bothered about the shipment coming with a lot of damage to the box and it had foot prints all over it. I reached out with concern and was told I could return it but will be charged to restock/service. This is uncool considering the condition it arrived in from the warehouse or etc.

Super easy to navigate site and delivery of item was very fast as well.

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