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Champion 811 Spark Plug
| Brand | Champion 811 |
|---|---|
| Center Electrode Diameter (Inch) | 0.1 |
| Center Electrode Tip Material | Nickel |
| Classification | Champion Copper Plus Small Engine |
| Electrical Terminal Type | Removable Nut |
| Ground Electrode Core Material | Nickel |
| Ground Electrode Material | Nickel Copper Alloy |
| Ground Electrode Quantity | 1 |
| Hex Size | 0.813 |
| Hex Size | 20.650 |
| Hex Type | Hex |
| Installed Height (Inch) | 2.24 |
| Manufacturer Heat Range | 82 |
| Plug Type | L82C |
| Pre-Gap Size | 0.032 |
| Pre-Gap Size | 0.82 |
| Reach | 0.5 |
| Resistor Type | No |
| Seat Type | Flat |
| Taper Diameter (Inch) | 0.25 |
| Thread Diameter | 0.551 |
| Thread Diameter | 14.000 |
| Product line | Copper Plus |
| Fits | Yamaha, LEM, Husqvarna, Aprilia, Honda, KTM, Kawasaki, Suzuki, Moto-Ski, Ski-Doo, Sno-Jet, John Deere, Jaguar, Skoda, Facel Vega, Fiat, Porsche, Standard, BMW, Ford, Renault, Berkeley, Borgward, Goggomobil, Goliath, Hansa, Lloyd, Bond, HRG, Riley, Triumph, Swallow, Delahaye, Healey, Jowett, Indian, Singer, Bugatti, and Mercedes-Benz · 6 vehicles |
Copper core electrode. Improves conductivity and heat control for steady wear.
Nickel center electrode. Supports dependable performance and consistent ignition.
Spark plug. Champion Copper Plus design for secondary ignition applications.
Cross-references Anchor 2421, Anchor 2636 and Anchor 2655 for the same application. See all 129.
Champion Copper Plus 811 Spark Plug
Champion Copper Plus 811 is a non-resistor spark plug built for dependable ignition performance in small-engine and classic applications. It uses a copper core electrode for improved conductivity and heat control, with nickel center and ground electrode materials for steady wear characteristics.
Compatible With 1956-1961 Fiat 500 applications, this plug matches the L82C type and is listed for the Fiat 500, making it a direct-reference choice for owners searching by vehicle, plug type, or part number 811.
Key Features
- Copper core electrode for strong conductivity and heat management
- Nickel center electrode tip and nickel ground electrode core material
- Non-resistor design
- Pre-gapped at 0.032 in. / 0.82 mm
- Flat seat with 0.5 in. reach and 14 mm thread diameter
- Removable nut terminal for common ignition lead setups
- Champion Copper Plus small engine classification
Product Details
The Copper Plus line focuses on consistent ignition performance with a copper core that helps transfer heat away from the firing tip. For the Fiat 500 and other listed cross-reference applications, Champion 811 provides a practical OE-style spark plug format with a 0.813 in. hex size, 82 heat range, and single ground electrode configuration. The plug type is L82C, and the flat seat design supports proper sealing when matched to the correct cylinder head specification.
This part cross-references NGK 2129 and Bosch 4038 for the same application.
Common Issues This Plug Can Address
- Hard starting caused by worn or fouled spark plugs
- Misfire from weak or inconsistent spark delivery
- Rough idle related to degraded ignition performance
- Reduced throttle response from aged plug electrodes
- Heat-related plug wear in small-engine ignition systems
Installation Notes and Tips
- Verify the plug type, reach, thread diameter, and seat style before installation.
- Check the gap against the engine specification; this plug is pre-gapped at 0.032 in. / 0.82 mm.
- Use the removable nut terminal only with the correct ignition lead style.
- Inspect the old plug for signs of oiling, carbon buildup, or overheating before replacing.
- Confirm the application matches 1956-1961 Fiat 500, N/A position, as listed.
Quality Assurance
Champion is a long-established ignition brand, and the Copper Plus line is built around copper-core electrode construction for controlled heat transfer and dependable wear characteristics. Part number 811 is specified as a Champion Copper Plus small engine spark plug and is supported by the listed interchange references for application matching.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1961 | Fiat | 500 | 0.5L | L2 | N/A | Non-resistor Spark Plug Type L82C with gap of 0.025 inch; Copper Plus |
| 1960 | Fiat | 500 | 0.5L | L2 | N/A | Non-resistor Spark Plug Type L82C with gap of 0.025 inch; Copper Plus |
| 1959 | Fiat | 500 | 0.5L | L2 | N/A | Non-resistor Spark Plug Type L82C with gap of 0.025 inch; Copper Plus |
| 1958 | Fiat | 500 | 0.5L | L2 | N/A | Non-resistor Spark Plug Type L82C with gap of 0.025 inch; Copper Plus |
| 1957 | Fiat | 500 | 0.5L | L2 | N/A | Non-resistor Spark Plug Type L82C with gap of 0.025 inch; Copper Plus |
| 1956 | Fiat | 500 | 0.6L | L4 | N/A | Non-resistor Spark Plug Type L82C with gap of 0.025 inch; Copper Plus |
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