Spark Plug # 415/RN9YC | Champion 415

For decades, RN9YC Champion premium spark plugs have gotten the job done on roadways, trails and waterways. As the most-used OEM spark plug brand, Champion uses precision materials and construction for reliable sparking, anti-fouling and corrosion resistance. Their RN9YC Copper Plus plugs have a nickel-copper alloy center and a ground electrode with excellent conductivity that better controls heat so they can operate over a wider range. A built-in ceramic resistor reduces EMI in boats with on-board computer systems and other electronics.

Champion RN9YC spark plugs were used in many sports cars and muscle cars from the 1960s to the 1980s. They are also popular OEM plugs in watercraft, powersports, generators and lawn equipment engines. Outboard motors from manufacturers like Volvo Penta, MerCruiser, OMC, Westerbeke and Gray Marine use the Champion 415 spark plug. Check the list below for some of the factory part numbers these plugs replace or contact us for assistance. Order these affordable replacement spark plugs with fast shipping to enjoy dependable start-up and idling every boating season.

Product Features:

• Champion Copper Plus premium spark plug
• Replaces the following OEM part numbers: Chrysler 2098379K; Westerbeke 35666 and 38568; NGK BPR6ES and BPR6EFS; Mercury 33-8134711 and 33-816336Q; Volvo 3851868; Autolite 4263; Torch F6RTC; Champion FF-22 and E3.22
• Standard nickel center electrode
• Met ISO and SAE manufacturing standards
• Thread Size: 0.551 inches (14mm)
• Reach: 0.75 inches (19mm)
• Hex Size: 0.813 inches (20.65mm)
• Gap: 0.032 inches (0.82 mm)
• Resistor: Yes (5k ohm)
• Flat gasket seal
• Manufacturer’s warranty: two years or recommended change interval