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Champion 306 Spark Plug
| Brand | Champion 306 |
|---|---|
| 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 | 86 |
| Plug Type | L86C |
| Pre-Gap Size | 0.025 |
| Pre-Gap Size | 0.63 |
| Reach | 0.5 |
| Resistor Type | No |
| Seat Type | Flat |
| Taper Diameter (Inch) | 0.31 |
| Thread Diameter | 0.551 |
| Thread Diameter | 14.000 |
| Product line | Copper Plus |
| Fits | Honda, Arctic Cat, KTM, Yamaha, Volkswagen, Suzuki, Kawasaki, Land Rover, DAF, Renault, Matra, Tatra, Fiat, Peugeot, Skoda, Chevrolet, AC, Morgan, Fairthorpe, BMW, Ford, Lotus, TVR, Peerless, Reliant, Aston Martin, Dellow, Frazer Nash, Singer, Delahaye, Hotchkiss, Jowett, Lea-Francis, Cisitalia, Saab, Salmson, and MG · 43 vehicles |
Copper core electrode. Improves conductivity and heat control for dependable performance.
Nickel-copper alloy ground electrode. Built for good overall wear and consistent ignition.
Champion Copper Plus. A trusted spark plug line for small-engine applications.
Cross-references AMS Automotive 4025, AMS Automotive 4214 and AMS Automotive 4510 for the same application. See all 73.
Champion Copper Plus 306 Spark Plug Overview
Champion Copper Plus 306 is a non-resistor spark plug built for dependable ignition performance in small-engine and classic vehicle applications. It uses a copper core electrode to improve conductivity and heat control, with nickel center and ground electrode materials for steady wear characteristics.
Compatible With Volkswagen Beetle, Land Rover Range Rover, and Ford Escort applications that call for Champion L86C / L86-style fitment, this plug supports direct replacement service where the specified thread, reach, seat, and gap match the engine requirements.
Key Features
- Champion Copper Plus line for straightforward ignition service
- Copper core electrode for improved conductivity and heat management
- Nickel center electrode tip and nickel ground electrode core material
- Non-resistor design for applications that specify a resistor-free plug
- Flat seat design with 14 mm thread diameter and 0.5 in reach
- Pre-gapped at 0.025 in / 0.63 mm
- Removable nut terminal for common ignition wire setups
- Champion part number 306, plug type L86C
Product Details
Champion 306 is engineered around a copper core construction that helps carry current efficiently while managing combustion heat. The plug features a 0.551 in thread diameter, 0.813 in hex size, flat seat, and a single ground electrode, making it a direct-match option for engines that specify these dimensions. The Copper Plus line focuses on practical, dependable service life for older ignition systems and small-engine use, and this part number 306 is listed among interchange references for several L86C-equivalent applications.
Fits 1950-1979 Volkswagen Beetle, N/A. Fits 1970-1974 Land Rover Range Rover, N/A. Fits 1956-1961 Ford Escort, N/A. This part cross-references Autolite 414 and DENSO Auto Parts 4014 for the same application.
Common Uses
- Restoring weak spark or inconsistent ignition performance
- Replacing worn plugs with carbon buildup or electrode wear
- Servicing engines that require a non-resistor, flat-seat plug
- Maintaining proper combustion in classic Volkswagen Beetle, Range Rover, and Ford Escort applications
- Addressing misfire symptoms caused by incorrect plug heat range or gap
Installation Notes
Verify the engine calls for Champion L86C / 306 specifications before installation. Confirm thread diameter, reach, seat type, and pre-gap against the service manual, and check the gap if your application requires a different setting than the factory pre-gap. Use the removable nut terminal only with the ignition lead style specified for the vehicle.
Quality Assurance
Champion Copper Plus plugs are built for dependable performance with a copper core electrode and nickel-based electrode materials for controlled wear and stable operation in the specified applications.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1979 | Volkswagen | Beetle | 1.6L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1978 | Volkswagen | Beetle | 1.6L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1977 | Volkswagen | Beetle | 1.6L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1976 | Volkswagen | Beetle | 1.6L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1975 | Volkswagen | Beetle | 1.6L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1974 | Land Rover | Range Rover | 3.5L | V8 | N/A | Non-Resistor Type; Gap 0.025 (in); Plug Type Number L86C; Copper Plus |
| 1974 | Volkswagen | Beetle | 1.6L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1973 | Land Rover | Range Rover | 3.5L | V8 | N/A | Non-Resistor Type; Gap 0.025 (in); Plug Type Number L86C; Copper Plus |
| 1973 | Volkswagen | Beetle | 1.6L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1972 | Land Rover | Range Rover | 3.5L | V8 | N/A | Non-Resistor Type; Gap 0.025 (in); Plug Type Number L86C; Copper Plus |
| 1972 | Volkswagen | Beetle | 1.6L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1971 | Land Rover | Range Rover | 3.5L | V8 | N/A | Non-Resistor Type; Gap 0.025 (in); Plug Type Number L86C; Copper Plus |
| 1971 | Volkswagen | Beetle | 1.6L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1970 | Land Rover | Range Rover | 3.5L | V8 | N/A | Non-Resistor Type; Gap 0.025 (in); Plug Type Number L86C; Copper Plus |
| 1970 | Volkswagen | Beetle | 1.6L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1969 | Volkswagen | Beetle | 1.5L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1968 | Volkswagen | Beetle | 1.5L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1967 | Volkswagen | Beetle | 1.5L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1966 | Volkswagen | Beetle | 1.2L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1966 | Volkswagen | Beetle | 1.3L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1965 | Volkswagen | Beetle | 1.2L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1964 | Volkswagen | Beetle | 1.2L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1963 | Volkswagen | Beetle | 1.2L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1962 | Volkswagen | Beetle | 1.2L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1961 | Ford | Escort | 1.2L | L4 | N/A | Non-Resistor Type; Gap 0.025 (in); Plug Type Number L86C; Copper Plus |
| 1961 | Volkswagen | Beetle | 1.2L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1960 | Ford | Escort | 1.2L | L4 | N/A | Non-Resistor Type; Gap 0.025 (in); Plug Type Number L86C; Copper Plus |
| 1960 | Volkswagen | Beetle | 1.2L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1959 | Ford | Escort | 1.2L | L4 | N/A | Non-Resistor Type; Gap 0.025 (in); Plug Type Number L86C; Copper Plus |
| 1959 | Volkswagen | Beetle | 1.2L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1958 | Ford | Escort | 1.2L | L4 | N/A | Non-Resistor Type; Gap 0.025 (in); Plug Type Number L86C; Copper Plus |
| 1958 | Volkswagen | Beetle | 1.2L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1957 | Ford | Escort | 1.2L | L4 | N/A | Non-Resistor Type; Gap 0.025 (in); Plug Type Number L86C; Copper Plus |
| 1957 | Volkswagen | Beetle | 1.2L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1956 | Ford | Escort | 1.2L | L4 | N/A | Non-Resistor Type; Gap 0.025 (in); Plug Type Number L86C; Copper Plus |
| 1956 | Volkswagen | Beetle | 1.2L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1955 | Volkswagen | Beetle | 1.2L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1954 | Volkswagen | Beetle | 1.2L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1954 | Volkswagen | Beetle | 1.1L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1953 | Volkswagen | Beetle | 1.1L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1952 | Volkswagen | Beetle | 1.1L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1951 | Volkswagen | Beetle | 1.1L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
| 1950 | Volkswagen | Beetle | 1.1L | H4 | N/A | Non-Resistor Type; OE Type; Gap 0.024 (in); Plug Type Number L86C; Copper Plus |
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