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Sierra 18-8811-1 Premium MagForce Marine Spark Plug Wire Set

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

118-8811-1
06/02/2036 10:37 PM
Sale Price

$35.99

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Product Details

The Sierra 18-8811-1 Premium MagForce Marine Spark Plug Wire Set is engineered to deliver maximum ignition performance for 4-cylinder marine engines with digital ignition systems. This complete wire set is designed for Mercury Marine and OMC stern drive applications, featuring advanced construction that protects sensitive marine electronics from interference.

Advanced MagForce Technology:

  • Kevlar core construction provides maximum durability and long service life
  • Magnetic suppression core with spiral-wound conductor delivers the hottest spark while eliminating RFI and EMI interference
  • 8mm high-tear-strength silicone jacket protects up to 500°F, providing superior high-temperature protection
  • Durable stainless steel wound conductor ensures maximum horsepower and engine performance
  • Reinforcing mesh and aramid inner core increase tensile strength and conductor integrity

Marine-Grade Terminals and Boots:

  • Corrosion-resistant stainless steel snap-lock terminals ensure maximum conductivity and prevent terminal pull-off
  • Pure silicone boots create a sealed barrier against heat, dirt, and moisture
  • Pre-greased silicone insulators for easier installation and superior protection
  • OE-style boots deliver factory-fit performance

This premium wire set is "electronics friendly," protecting GPS, VHF, Loran, and electronic engine controls from radio frequency and electromagnetic interference. The kit includes 5 wires and is compatible with GM, Volvo, Mercruiser, and OMC marine engine applications. Meets or exceeds original equipment performance standards while improving engine efficiency and fuel economy.

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