Champion 840C RCJ8 Copper Plus Spark Plug

The Champion 840C is a reliable copper core spark plug designed for small engines and outdoor power equipment. This RCJ8 heat range plug delivers dependable ignition performance for lawn mowers, chainsaws, trimmers, snow blowers, and other small engine applications.

Key Features:

• Copper core center electrode for superior heat dissipation and conductivity
• Resistor design helps suppress electromagnetic interference with electronic systems
• 14mm thread diameter with 3/4-inch (19mm) reach
• 5/8-inch (16mm) hex size for easy installation
• RJ19LM cross-reference compatible design
• Proven performance for 2-stroke and 4-stroke small engines

Champion spark plugs are engineered with a copper core electrode that provides excellent heat transfer and prevents pre-ignition. The resistor construction reduces radio frequency interference, protecting sensitive electronics on modern equipment. This spark plug features a durable construction that withstands the demanding conditions of outdoor power equipment operation.