Champion L86C Marine Spark Plug, Copper Core Electrode

The Champion L86C is a marine-grade spark plug built as a quality OEM replacement for boat engines. It uses a copper core center electrode, which increases conductivity and improves heat control across the plug for good overall wear compared to standard designs. The copper core also helps the plug resist fouling, so ignition stays consistent even after extended runtime.

Marine engines run hotter and under heavier, more sustained loads than typical automotive engines, and the L86C is designed to resist overheating under these conditions. Its shell is built for superior corrosion resistance, an important feature in the humid, salt-exposed environment marine engines operate in. Champion backs the L86C with dependable, proven performance, and the plug is also identified under Champion's own trade number 306, which appears on some packaging and cross-reference charts alongside the L86C part number.

This spark plug is a straightforward drop-in replacement for engines that call for the Champion L86C, delivering the same fit, thread size, and performance characteristics as the original equipment.

Specifications

• Brand: Champion
• Manufacturer Part Number: L86C
• Champion Trade Number: 306
• UPC: 037551000340
• Core Material: Copper
• Shell Material: Alloy Steel
• Thread Size: 14mm x 1.25mm
• Weight: 0.15 pounds

Frequently Asked Questions

What is the manufacturer part number for this spark plug? The manufacturer part number is L86C, and Champion also identifies this same plug under its own trade number 306.

Is this a copper spark plug? Yes, the Champion L86C uses a copper core center electrode, which increases conductivity and improves heat control for good overall wear.

What thread size does this spark plug use? 14mm x 1.25mm is the thread size for the Champion L86C marine spark plug.

Does the Champion L86C resist corrosion? Superior corrosion resistance is built into the Champion L86C, making it suited to the humid, salt-exposed conditions marine engines run in.

How much does this spark plug weigh? 0.15 pounds is the shipping weight of the Champion L86C spark plug.

What is Champion trade number 306? Trade number 306 is Champion's own identification number for the L86C spark plug, used alongside the L86C part number on packaging and cross-reference charts.

Will this plug resist fouling? Fouling resistance is part of the Champion L86C's design, helping keep the spark consistent through heavy marine engine use.

What material is the plug shell made from? An alloy steel shell houses the copper core center electrode in the Champion L86C spark plug.

Is the Champion L86C an OEM-quality replacement? Champion manufactures the L86C as a quality OEM replacement plug rather than a generic aftermarket copy.

Can this spark plug handle heavy engine loads? Heavy engine loads are exactly what the Champion L86C is designed for, resisting the overheating that degrades performance under sustained marine use.

What UPC is associated with this spark plug? UPC 037551000340 identifies the Champion L86C marine spark plug.