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Add to CartNGK Racing plugs bring ultra-high performance in variety of heat ranges. The center electrode of the NGK Racing spark plugs has special configurations and designs to ensure durability and ignitability. NGK Racing spark plugs are designed with extreme use in mind and meant to withstand the most grueling racing conditions.
Fits: I/O-1993-1975 FLAGSHIP
Check your engine and maintenance manual for the correct spark plug and only use as recommended by your engine's original equipment manufacturer. Using the wrong plug can reducing optimum performance, reduce fuel economy or cause damage to your engine.
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
Quicksilver 8134214 | NGK R5673-8 Spark Plugs (Qty 4)Made of premium materials and validated for marine use, these Quicksilver Spark Plugs help keep high-performing Mercury Racing 575 SCi engines...
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NGK BPR4HS Spark Plug NGK Standard Spark Plugs are proven technology that offer reliable performance. Standard spark plugs are treated with corrosion-resistant plating to ensure ease of installation...
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