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Champion 18S Copper Plus Spark Plug RV15YC4

Manufacturer

Champion

<h3>Champion: A Legacy of Engine Performance</h3><p>For decades, <strong>Champion</strong> has been one of the most trusted names in engine ignition and maintenance. Born from a commitment to precision engineering, Champion has earned its reputation by delivering reliable, time-tested replacement parts that keep engines running at their best — whether on the road, on the water, or in the backyard.</p><h3>World-Class Spark Plug Technology</h3><p>Champion's story is inseparable from the spark plug. The brand helped pioneer modern ignition technology, and today its spark plug lineup remains a go-to choice for automotive technicians and DIY mechanics alike. Champion <a href="/120-champion-spark-plug-7212">spark plugs</a> are engineered to deliver consistent ignition performance across a wide range of engine types, from daily-driver commuter cars to high-demand power sport machines. Whether you're tuning up a classic V8 or maintaining a small-displacement four-cylinder, Champion offers a plug designed to match your engine's specific requirements.</p><p>Beyond the plug itself, a reliable ignition system depends on every component working in harmony. Champion's <a href="/120-champion-spark-plugs-spark-plug-boot-kit-23507">spark plug boot kits</a> provide the complete solution — protecting ignition wires and ensuring a secure, interference-free connection between the plug and the ignition system. These kits are especially popular for vehicle owners who want a thorough tune-up rather than a partial fix.</p><h3>Marine and 2-Cycle Engine Solutions</h3><p>Champion's expertise doesn't stop at automotive ignition. The brand also serves boaters and marine enthusiasts with products formulated for the unique demands of water-based engines. Champion <a href="/120-champion-2-cycle-outboard-oil-200042">2-cycle outboard oil</a> is designed to protect outboard motors running in demanding marine conditions, helping to minimize wear, reduce deposits, and extend engine life. It's a natural extension of Champion's core philosophy: give every engine — regardless of application — the quality it deserves.</p><h3>Built for Every Engine, Every Application</h3><p>What sets Champion apart is the breadth of its coverage. From passenger vehicles to boats, lawn and garden equipment to power sport machines, Champion engineers products with real-world performance in mind. The brand's catalog of over 800 products means that regardless of what you drive, ride, or operate, there's a Champion part designed to keep it running at peak efficiency.</p><p>Whether you're doing a routine tune-up or a full ignition system overhaul, Champion's combination of heritage, innovation, and comprehensive coverage makes it a brand worth turning to first.</p>

Part Number

18S
06/01/2036 12:55 AM
Sale Price

$69.74

2 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Champion 18S Copper Plus spark plug (stock number RV15YC4) is a conventional nickel alloy spark plug designed for dependable performance across automotive, marine, and small engine applications. This resistor-type spark plug features proven technology that delivers reliable ignition and efficient combustion.

Key Features:

  • Copper core center electrode provides increased conductivity and accurate heat control for extended service life
  • Nickel alloy electrodes on both center and ground electrodes for durability
  • Patented SAC-9 semiconductor resistor suppresses electromagnetic and radio frequency interference
  • 14mm thread diameter with tapered seat design ensures proper fit and seal
  • Heat range 15 suitable for a wide range of operating conditions
  • Pre-gapped to 0.040" (1.0mm) for convenient installation

Specifications:

  • Thread Size: 14mm (9/16")
  • Thread Pitch: 1.25mm
  • Reach: 11mm (7/16")
  • Hex Size: 5/8" (16mm)
  • Seat Type: Tapered
  • Terminal Type: Solid, non-removable
  • Electrode Projection: Extended
  • Resistor: Yes (SAC-9 type)
  • Torque Specifications: 7-15 lb-ft (cast iron or aluminum heads)

OEM Cross-References: Replaces Mercury Marine 18S and 896329018, Johnson/Evinrude/OMC 0500574 and 3854400. This plug is commonly used in marine engines, classic automotive applications, and various small engines including lawn equipment and generators.

Backed by Champion's century-plus legacy of spark plug manufacturing excellence, the 18S delivers the performance and reliability expected from a trusted industry leader.

Was pretty easy

Fine so far

fine

easy ordering fast response an on time delivery....

Wagner disc rotors. Happy with product (Have not installed yet) and buying experience

all great service

Package arrived on time, and quality was good. Shipping and taxes all included. Its really worth the money spent. Thank you Andy

quick and good pricing

Very simple and easy. Just waiting on my part to arrive now.

Fast shipping, great product. Nothing more needs to be said.

Autoplicity was quick and easy. Painless web format. Shiped right away. And reasonably priced too.

Great communication, Great prices! They beat all the competitors hands down on price for my cold air intake order #18986. Quick shipping and they are now in my favorites for places to look for automobile needs. The only thing I would like to see them change is the speed of their website.

Fast and easy, I do wish there had been a section for related products. Or "Other costumers liked these simular items"

Cheap prices, great quality, and fast delivery. Autoplicity will continue to receive my patronage.

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