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Sierra 18-8836-1 Marine Spark Plug Wire Set for 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

118-8836-1
07/14/2036 7:39 PM
Sale Price

$93.53

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Product Details

The Sierra 18-8836-1 is a premium marine spark plug wire set engineered specifically for MerCruiser 350 MAG MPI SKI engines equipped with Delco HEI ignition systems. This complete wire set delivers maximum voltage from the coil to the spark plugs while protecting sensitive electronic devices from radio-frequency and electromagnetic interference.

Key Features:

  • High-tear-strength silicone jacket protects to 500°F for superior heat resistance
  • Unique mag wire conductor delivers the hottest spark for optimal engine performance
  • Reinforcing mesh increases tensile strength and wire durability
  • Aramid inner core ensures conductor integrity in harsh marine environments
  • Pure silicone boots provide maximum heat and moisture protection
  • Stainless steel snap-lock terminals resist corrosion and prevent terminal pull-off
  • 8mm wire diameter for reliable current delivery

Wire Lengths Included:

  • 1 spark plug wire at 29 inches
  • 3 spark plug wires at 33 inches
  • 2 spark plug wires at 39 inches
  • 2 spark plug wires at 45 inches
  • 1 coil wire at 16 inches

This set replaces Mercury MerCruiser OEM part numbers 84-816608Q71 and 84-816608A71, as well as Indmar 756002. Sierra marine ignition wires are designed to meet or exceed OEM specifications and are built to withstand the demanding marine environment.

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