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Add to CartChampion marine spark plugs are quality OEM replacements. The Champion QL78YC Spark Plug features a copper core electrode that provides increased conductivity and heat control for good overall wear. It has been built to conform with ISO and SAE standards and provides dependable performance as well as durability. This OE type replacement plug resists fouling and offers exceptional corrosion resistance. The nickel copper alloy electrode at its core allows accurate heat range control for a longer life. Its resistor and flat head seat types are responsible for its enhanced performance. These marine spark plugs are designed to resist overheating under heavy engine loads.
NOTE: The Champion QL78YC Spark Plug is NOT compatible with the 1989 Johnson outboard motor. To find the best plug for these types of engines, use our Parts Finder located at the top of the Johnson Outboard Parts page.
Champion QL78YC Spark Plug
Specifications:
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
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