Spark Plug # 415/RN9YC | Champion 415
Spark Plug # 415/RN9YC | Champion 415
Champion
22 in stock
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Spark Plug # 415/RN9YC | Champion 415
Spark Plug # 415/RN9YC | Champion 415
Keep your outboard motor and small engine running at peak performance with these premium copper spark plugs. Built as OEM replacements, they deliver the reliable ignition your equipment demands for consistent, dependable operation day after day.
- 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
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Manufacturer’s warranty: two years or recommended change interval
Additional Information
The Champion RN9YC Copper Plus represents decades of proven engineering excellence across marine, powersports, and small engine applications. Its nickel-copper alloy center electrode and optimized ground electrode geometry deliver superior thermal management and conductivity, enabling reliable performance across extended operating ranges. The integrated ceramic resistor effectively suppresses EMI in modern electronics-equipped vessels. Specified as original equipment by Volvo Penta, MerCruiser, OMC, Westerbeke, and Gray Marine, this plug combines anti-fouling properties with corrosion resistance for consistent ignition and stable idle characteristics. A precision-engineered solution for demanding marine environments.
! Compatibility references are provided for informational purposes only and do not constitute a fitment guarantee. Part numbers, application listings, and "replaces" cross-references are based on manufacturer data and are intended as a starting point for identification — not a guarantee of fit for your specific engine, hull, or installation.
Buyer is solely responsible for verifying compatibility with their engine model, serial number, model year, and trim configuration before purchase. If you are unsure whether this part fits your application, contact MacombMarineParts.com before you buy — we're available via text, email, or online chat to help verify compatibility for your specific application.
MacombMarineParts.com is not liable for parts ordered based on assumed fitment. Returns due to buyer-selected incorrect fitment are subject to our standard return and restocking fee policies.