My Account
Shopping Cart

Champion 8331 L78V Copper Core Marine Spark Plug

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

8331
06/02/2036 3:23 PM
Sale Price

$6.21

In Stock (10+)

delivery box

Usually delivered within 2 days

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Champion 8331 (Stock #L78V) is a conventional copper core spark plug designed for marine outboard motors and small engines. This reliable replacement plug delivers proven performance in demanding marine and powersports applications.

Key Features:

  • Copper core center electrode provides increased conductivity and superior heat control
  • Nickel alloy center and ground electrodes offer excellent wear characteristics
  • Surface discharge design for reliable ignition
  • Gasket seat configuration ensures proper sealing
  • 14mm thread diameter with 1.25mm thread pitch
  • 12.7mm (1/2") reach
  • 13/16" (21mm) hex size for easy installation
  • Non-resistor design
  • Heat range: 78

This OE-replacement spark plug is an excellent choice for older marine engines, outboard motors, lawn and garden equipment, and similar small engine applications. Cross-references include NGK BUHW-2, Autolite 2872, and Bosch W4AC. Torque specifications: 26-30 lb-ft for cast iron heads, 18-22 lb-ft for aluminum heads.

Good need receipt

Fair prices

Ordering online was easy. Got exactly what I ordered. Just living in Hawaii shipping is a bit slow on bigger items, but that's normal.

would buy from them again

AAA+++

Great price, awesome selection fair shipping pricing

Fair price, saved about 40bucks. national cycle Street Shield EX for my Harley Sportster. easy to nav. web site.

Best price I can find on my item and fast shipping. Thinking about becoming a member to order all my parts for my racing team.

Good prices. Good communication.

I ordered this product and Wednesday in the morning and it was on my door step Thursday morning with regular shipping. The ordering process was super easy and the price was $35 cheaper than any other online retailer. The Rack is awesome, easy to assemble took me about 20 minutes by myself, put on my jeep hooked up the bikes and off I went, fantastic design, I highly recommend the Rola NV2 bike rack and highly recommend Autoplicity

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy