Champion 415 RN9YC Copper Plus Marine Spark Plug

Champion 415 RN9YC Copper Plus Marine Spark Plug

The Champion 415 RN9YC Copper Plus Marine Spark Plug is a standard replacement spark plug for compatible marine engine applications requiring an RN9YC plug. Its copper core center electrode provides reliable conductivity and helps maintain accurate heat control for consistent performance and wear.

This resistor-type spark plug features a nickel-copper alloy ground electrode and Champion's corrosion-resistant TinTac and ULTRASEAL shell coatings. The flat-seat design uses an included crush washer, while the removable terminal nut accommodates compatible ignition connections.

Product Features

• Champion Copper Plus standard replacement spark plug
• Copper core center electrode supports conductivity and heat control
• Resistor design helps suppress electromagnetic and radio-frequency interference
• Nickel-copper alloy ground electrode with a single-electrode design
• TinTac and ULTRASEAL shell coatings help resist corrosion
• Flat seat with included crush washer
• Removable terminal nut
• Built to applicable ISO and SAE performance standards

Spark Plug Specifications

• Champion Part Number: 415
• Plug Type: RN9YC
• Manufacturer Heat Range: 9
• Pre-Gap: 0.032 in. (0.82 mm)
• Thread Diameter: 14 mm
• Reach: 0.750 in.
• Hex Size: 0.813 in. (20.65 mm)
• Seat Type: Flat
• Resistor Plug: Yes
• Ground Electrode Quantity: 1

Fitment Note: Spark plug requirements and installed gap can vary by engine. Verify RN9YC compatibility and the required spark plug gap using the engine manufacturer's service information before installation.

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