Champion 821 Spark Plug

Reliable Ignition with Champion Copper Plus Spark Plug 821

The Champion Copper Plus Spark Plug 821 delivers consistent ignition performance for small engine applications. Designed with durable nickel and copper alloy materials, this spark plug supports efficient combustion and reliable starts.

• Ground electrode core made of nickel for durability
• Nickel center electrode tip ensures stable spark
• Pre-gapped to 0.030 inches (0.76 mm) for optimal ignition
• Flat seat type with 0.5 inch reach and 14 mm thread diameter
• Non-removable nut electrical terminal for secure connection
• Heat range rating of 77 suitable for small engines
• Hex size of 13/16 inch (20.65 mm) for easy installation
• Single ground electrode made from nickel copper alloy

About the Champion Copper Plus Product Line

The Copper Plus line from Champion is engineered specifically for small engine applications, providing a balance of durability and performance. These spark plugs feature copper cores that enhance conductivity and heat dissipation, which helps maintain consistent ignition under various operating conditions. The Champion Copper Plus 821 spark plug is part of this line, designed to meet the demands of small engines requiring reliable secondary ignition components.

Technical Details and Specifications

The Champion Copper Plus 821 spark plug features a nickel ground electrode core and a nickel center electrode tip, both contributing to long-lasting performance. The plug is pre-gapped at 0.030 inches (0.76 mm), ensuring proper spark gap for efficient combustion. It has a flat seat type and a reach of 0.5 inches, with a thread diameter of 14 mm (0.551 inches). The heat range is rated at 77, suitable for a variety of small engine applications. The electrical terminal is a non-removable nut type, and the hex size is 13/16 inch (20.65 mm), allowing for straightforward installation with standard tools.

Applications and Common Issues Addressed

• Compatible with small engines requiring a 14 mm thread spark plug
• Helps resolve hard starting problems due to worn or faulty plugs
• Improves engine misfire issues by providing consistent spark delivery
• Reduces fouling in engines operating under varied conditions
• Supports stable idling and smooth acceleration in small engine vehicles

Installation Notes and Tips

Before installing the Champion Copper Plus 821 spark plug, verify the engine’s specifications to ensure compatibility with a 14 mm thread diameter and 0.5 inch reach. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended torque setting to avoid damage. The pre-gapped 0.030 inch gap typically requires no adjustment, but it is advisable to check the gap before installation. The non-removable nut terminal ensures a secure electrical connection; ensure the ignition wire is properly seated.

Quality Assurance and Warranty

Champion spark plugs are manufactured to meet industry standards for ignition components. The Copper Plus 821 spark plug undergoes rigorous quality control to ensure consistent performance and durability. While specific warranty details are not provided, Champion products generally come with manufacturer support for defects and performance issues.