Champion 502 Spark Plug

Champion Copper Plus 502 Spark Plug

Champion Copper Plus 502 is an agricultural and industrial spark plug built for high-temperature, high-load service. It uses nickel center and ground electrode tip materials, a flat seat, and a 0.025 in. pre-gap to support consistent ignition performance in demanding equipment.

For buyers searching for Champion 502 spark plug applications, this plug is also referenced in secondary ignition cross-checks for equipment and driveline service parts. If you are sourcing a Champion agricultural plug for maintenance on compatible tractor, mower, or utility equipment, the 502 part number is the key identifier.

Key Features

• Champion Copper Plus line spark plug for industrial and agricultural use
• Nickel center electrode tip material
• Nickel ground electrode core material
• Flat seat design with 0.5 in. reach
• 0.709 in. thread diameter and 0.875 in. hex size
• Removable nut terminal type
• No resistor design
• Manufacturer heat range 21

Product Details

The Champion Copper Plus 502 spark plug is engineered for service environments where heat and load are part of daily operation. Its nickel electrode construction supports dependable spark delivery, while the flat seat and specified thread dimensions help ensure proper cylinder head fitment when the application calls for this plug type. The 502 part number is commonly used in agricultural and industrial ignition service, and it is also cross-referenced by Autolite 86 and 388 for the same application.

Searches for Champion 502, Champion Copper Plus 502, and Champion agricultural spark plug often point to this plug when replacing worn ignition components in equipment that relies on stable secondary ignition performance. For make/model research, always verify the plug type, reach, seat style, and terminal configuration against the original specification before installation.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Misfire from inconsistent spark delivery
• Rough running under load in agricultural equipment
• Ignition performance loss from incorrect plug heat range
• Poor cylinder firing due to incorrect thread or seat style

Installation Notes

Confirm the plug type, thread diameter, reach, seat type, and terminal style before installation. Set the gap to the specified 0.025 in. if required by your application, and inspect the ignition lead connection to ensure the removable nut terminal is properly configured. For vehicle and equipment searches such as Champion 502 spark plug for tractor or mower service, match the original plug specification exactly.

Compatible With applications that call for Champion 502, including selected agricultural and industrial ignition setups. Fits should be verified by plug dimensions and engine specification rather than by appearance alone.

Quality Assurance

Champion backs its industrial and agricultural spark plugs with global engineering support from Federal-Mogul. The Copper Plus line is built around durable nickel electrode materials and service-focused construction for demanding operating conditions.