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Sierra 18-5108 Pick Up Coil Sensor for Marine Delco HEI Ignition

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

18-5108
08/04/2036 11:05 AM
Sale Price

$29.74

In Stock (10+)

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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 18-5108 Pick Up Coil Sensor is a critical ignition system component designed for marine engines equipped with Delco HEI (High Energy Ignition) electronic distributors. This sensor works inside the distributor to generate the timing signal that triggers the ignition module, eliminating the need for traditional points and condensers in electronic ignition systems.

Key Features:

  • Designed for GM 4-cylinder, V6, and V8 marine engines with Delco HEI ignition systems
  • Compatible with Delco electronic ignition distributors manufactured prior to 2002
  • Includes retaining clip for secure installation
  • Manufactured to meet or exceed OEM specifications for reliable marine performance
  • Direct replacement for original equipment parts

OEM Cross-References:

  • Replaces Mercury Marine 811639, 811639T
  • Replaces OMC 3854001, 986642
  • Replaces Volvo Penta 3854001

This pickup coil sensor is commonly used on MerCruiser, OMC Cobra, Volvo Penta, and other marine sterndrives and inboard engines. Installation requires removal of the distributor for proper timing alignment after reassembly. Sierra marine parts are engineered to withstand harsh marine environments and deliver dependable performance.

Products specifications

Type

Ignition Coils

Great product. Friendly knowledge based people. Fast shipping. Will order from them again.

fast and great pricing

Had the best price on the web for the item ordered. Fast processing and shipping. Only took 3 days total to receive my order.

Best price I could find, easy to order and pay thru Amazon, so far so good

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Good

Found the best price at Autoplicity on my cold air intake. Quick turn-around time and inexpensive shipping. I'll definitely be back.

This is my second order, so far it's been a great experience.

Great Prices much cheaper than going through the high dollar mail order companies. Same product and I saved about 50 bucks!

Smooth and easy

Arrived on time, packaged well. Would buy again

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