Champion CCH942M Copper Plus Marine Spark Plug RV91MC

The Champion CCH942M (RV91MC) is a Copper Plus marine spark plug designed for dependable performance in marine engine applications. This quality OEM replacement spark plug delivers reliable ignition in demanding saltwater and freshwater environments.

Key Features:

• Copper core center electrode provides increased conductivity and heat control for optimal performance and wear characteristics
• SAC-9 semiconductor resistor reduces radio frequency interference (RFI) to prevent ignition misfires and radio static
• Patented Ultraseal coated shell provides maximum corrosion resistance in harsh marine environments
• Designed to resist overheating under heavy engine loads
• 14mm thread size with tapered seat design
• 5/8 inch (15.88mm) hex size for standard socket installation
• Pre-gapped at 0.032-0.038 inches (0.81-0.97mm) for convenient installation

Technical Specifications:

• Thread Size: 14mm (0.551 inch)
• Thread Reach: 0.441 inches
• Seat Type: Tapered
• Heat Range: 91
• Terminal Type: Non-removable nut
• Resistor Type: SAC-9 semiconductor
• Center & Ground Electrode Material: Nickel copper alloy

This Champion marine spark plug maintains accurate heat range control to optimize engine performance and extend spark plug life. The extruded copper core electrode design ensures dependable starts and continued reliability throughout the operating season.