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Champion 555 Spark Plug
| Brand | Champion 555 |
|---|---|
| Center Electrode Diameter (Inch) | 0.125 |
| Center Electrode Tip Material | Nickel |
| Classification | Champion Agricultural Plugs |
| Electrical Terminal Type | Removable Nut |
| Ground Electrode Core Material | Nickel |
| Ground Electrode Material | Nickel Copper Alloy |
| Ground Electrode Quantity | 1 |
| Hex Size | 0.875 |
| Hex Size | 22.230 |
| Hex Type | Hex |
| Installed Height (Inch) | 2.25 |
| Manufacturer Heat Range | 16 |
| Plug Type | UD16 |
| Pre-Gap Size | 0.025 |
| Pre-Gap Size | 0.65 |
| Reach | 0.5 |
| Resistor Type | No |
| Seat Type | Flat |
| Taper Diameter (Inch) | 0.4 |
| Thread Diameter | 0.709 |
| Thread Diameter | 18.000 |
| Product line | Copper Plus |
| Fits | Checker and Ford |
Copper Plus line. Built for industrial and agricultural service.
Nickel electrodes. Durable materials help handle high-load, high-temperature use.
Flat seat design. Provides a secure, straightforward spark plug fit.
Cross-references Anchor 3035, BZ8 and UD16 for the same application. See all 3.
Champion Copper Plus 555 Spark Plug
Champion Copper Plus 555 is an industrial and agricultural spark plug built for high-temperature, high-load service. It uses a nickel center electrode tip, nickel ground electrode core, and a nickel copper alloy ground electrode to support stable ignition performance in demanding equipment.
Key Features
- Part number 555 in the Champion Copper Plus line
- Nickel center electrode tip material for dependable spark delivery
- Nickel ground electrode core with nickel copper alloy ground electrode
- Pre-gapped to 0.025 in. / 0.65 mm
- Flat seat design with 0.5 in. reach
- 18 mm thread diameter and 0.875 in. hex size
- Non-resistor design with removable nut terminal
- Manufacturer heat range 16
Product Details
The Copper Plus line is positioned for service environments where heat and load are part of daily operation. Champion uses global engineering from Federal-Mogul and applies plug designs intended for industrial and agricultural duty, including features that help the plug maintain performance under elevated operating temperatures. Part number 555 is also referenced as UD16, and it cross-references Anchor 3035 for the same application.
Common Issues This Spark Plug Can Address
- Hard starting caused by worn or fouled spark plugs
- Misfire from weak or inconsistent ignition output
- Rough running under load in tractors, mowers, and other equipment
- Reduced combustion efficiency from excessive electrode wear
- Service interruptions from plugs that no longer hold the correct gap
Installation Notes
Verify the thread diameter, reach, seat type, and heat range before installation. Check the gap against the engine specification even though the plug is pre-gapped at 0.025 in. Use the removable nut terminal only if your ignition lead requires that style of connection. For fitment-based searches, this Champion 555 spark plug is commonly searched for industrial and agricultural engines, including Champion agricultural plug applications and equipment using the UD16 specification.
Quality Assurance
Champion backs this spark plug with engineering developed for industrial and agricultural service conditions. The Copper Plus design uses durable nickel-based electrode materials to support consistent operation in demanding environments.
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