Champion 805 Spark Plug

Champion Copper Plus Spark Plug 805

Champion Copper Plus 805 is a spark plug built for dependable ignition performance in small engine and secondary ignition applications. It uses a copper core electrode for improved conductivity and heat control, with nickel center and ground electrode materials for consistent wear characteristics.

Key Features

• Copper core electrode for efficient conductivity and heat management
• Nickel center electrode tip and nickel ground electrode core material
• Pre-gapped at 0.025 in. / 0.65 mm
• Flat seat design with 0.75 in. reach
• 14 mm thread diameter, 20.65 mm hex size, removable nut terminal
• Non-resistor design for applications that call for a standard ignition plug
• Champion Copper Plus small engine classification

Product Details

The Champion Copper Plus line focuses on straightforward ignition service with a copper core that helps carry current efficiently while managing heat across the firing end. Part number 805 is specified with a flat seat, 0.75-inch reach, 14 mm thread diameter, and a 0.025-inch pre-gap, making it important to match the plug to the engine’s original specifications. This plug is commonly referenced in small engine and secondary ignition service, including applications where Champion 805 cross-references to NGK 2411 for the same application.

For fitment-based searches, this spark plug is often sought for Champion 805 replacement needs in small engine equipment and related ignition service. If you are comparing Champion Copper Plus 805 against OE-style plug references, verify thread size, reach, seat type, and heat range before installation.

Common Issues It Can Help Address

• Hard starting caused by worn or fouled spark plugs
• Weak spark output from aged ignition components
• Rough idle or inconsistent combustion
• Misfire symptoms tied to incorrect plug gap or heat range
• Loss of throttle response in small engine ignition systems

Installation Notes and Tips

Confirm the engine calls for a 14 mm, flat-seat plug with 0.75-inch reach before installation. Check the gap against the engine specification even though the plug is pre-gapped at 0.025 inch, and inspect the terminal style to ensure the removable nut matches the ignition lead. Use the correct torque procedure for the engine and avoid over-tightening the nickel threads and seat.

For vehicle and equipment searches, shoppers often compare Champion 805 with small engine ignition references and Champion Copper Plus spark plug listings for Honda Civic, Toyota Corolla, and similar maintenance queries, but final selection should always follow the exact engine specification.

Quality Assurance

Champion’s Copper Plus design uses a copper core electrode to support conductivity and heat control, with nickel electrode materials selected for dependable wear characteristics. Part number 805 is built to the listed dimensions and heat range for accurate replacement selection.