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Sierra 18-8809-1 Premium MagForce Marine Spark Plug Wire Set Inline 6-Cylinder

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

18-8809-1
06/01/2036 2:41 AM
Sale Price

$69.79

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Product Details

The Sierra 18-8809-1 is a premium MagForce marine spark plug wire set engineered for inline 6-cylinder engines equipped with a conventional ignition system. Designed to meet or exceed OEM performance standards, this wire set delivers reliable ignition energy from the coil to each spark plug while protecting your vessel's sensitive electronics from interference.

Key Features:

  • Magnetic Suppression Core — Application-specific design optimizes spark delivery for your engine
  • Kevlar® Reinforced Core — Provides maximum tensile strength, durability, and long service life
  • Stainless Steel Wound Conductor — Durable construction supports maximum horsepower and engine performance
  • Premium Silicone Jacketing & Boots — Rated to withstand extreme heat, offering superior protection in demanding marine environments
  • Superior RFI/EMI Suppression — Electronics-friendly design protects GPS, VHF, Loran, and other onboard electronic systems
  • Corrosion-Resistant Stainless Steel Terminals — Snap-lock spark plug and distributor terminals ensure maximum conductivity and resist the harsh marine environment
  • OE-Style Boots — Sealed barrier guards against heat, dirt, and moisture intrusion
  • Thunderbolt-Type Ignition Compatible — Designed for use with Thunderbolt-style ignition systems
  • Coil Wire Included — Complete set includes the coil wire for a full replacement

Wire Lead Lengths:

  • 1 wire — 15 inches
  • 1 wire — 22 inches
  • 2 wires — 9 inches each
  • 2 wires — 25 inches each

Replaces OEM Part Numbers: Mercury Marine 84-816761A8, 84-813720A8, 84-43376A8 | Mallory 9-28017

Products specifications

Type

Spark Plug Wires

great pricing and received my purchase quickly. the box was a bit torn up, but the contents were fine.

Fast. Quality . Low price

Great Prices and fast shipping rates. The fuel gauge/sending unit doesn't work correctly.

ok so far

easy to use

Ticketyboo

Great price and easy to use sight

easy transaction

Nice and quick. Well scripted to take customer info straight from paypal. That was what...4 clicks? Nice!

Smooth easy process

Pretty simple and easy to use

I was trying to locate a hi volocity radiator fan and for it at Autoplicity at a very good price. The item was shipped fairly quickly concidering it most likely had to come from the manufacturer. Thanks for your help.

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