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Part #: 512

Champion 512 Spark Plug

Copper Plus
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OE Direct Replacement — Bolt-on fit, no modifications needed
Copper Plus
Fitment: Hudson and Cord, Hornet, 812, and 810
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Reliable Ignition with Champion Copper Plus Spark Plug 512

The Champion Copper Plus Spark Plug 512 delivers consistent ignition performance for small engine applications. Designed with durable nickel and copper alloy components, this spark plug supports efficient combustion and reliable starts in various small engine models.

  • Ground electrode core made of nickel for durability
  • Nickel center electrode tip ensuring stable spark
  • Pre-gap size of 0.030 inches (0.78 mm) optimized for ignition
  • Flat seat type with a reach of 0.438 inches for proper fitment
  • Thread diameter of 14 mm (0.551 inches) compatible with many small engines
  • Non-removable nut electrical terminal type for secure connection
  • Heat range 12 suitable for moderate operating temperatures
  • Hex size of 0.813 inches (20.65 mm) for standard installation tools
  • Classification as Champion copper plus small engine spark plug

About the Champion Copper Plus Product Line

The Copper Plus line from Champion focuses on spark plugs designed specifically for small engines, combining copper core technology with nickel alloy electrodes. This combination enhances conductivity and wear resistance, providing stable ignition and longer service life in applications such as lawn mowers, generators, and other small engine equipment. The Champion Copper Plus Spark Plug 512 is engineered to meet the demands of these engines with precise specifications and quality materials.

Technical Details and Specifications

The Champion Copper Plus 512 spark plug features a single ground electrode made from a nickel copper alloy, paired with a nickel center electrode tip. The plug’s pre-gap is factory set at 0.030 inches (0.78 mm), ensuring optimal spark gap for efficient combustion. It has a flat seat design and a reach of 0.438 inches, with a thread diameter of 14 mm (0.551 inches), making it compatible with a range of small engine models. The heat range rating of 12 indicates its suitability for engines operating under moderate heat conditions. The plug does not include a resistor, and the electrical terminal is a non-removable nut type, providing a secure and reliable connection.

Common Applications and Problem Solving

  • Restores reliable ignition in small engines such as lawn mowers and generators
  • Addresses misfiring or hard starting issues caused by worn spark plugs
  • Improves fuel efficiency by maintaining proper spark gap and electrode condition
  • Reduces fouling and electrode wear with durable nickel and copper materials
  • Supports consistent engine performance under moderate heat conditions

Installation Notes and Tips

When installing the Champion Copper Plus Spark Plug 512, ensure the pre-gap is maintained at 0.030 inches (0.78 mm) if adjustment is necessary. Use a 13/16 inch (20.65 mm) socket wrench to tighten the hex nut securely without over-torquing. Confirm the flat seat type matches the engine’s cylinder head to ensure proper sealing. Always install the spark plug in a clean, dry cylinder to prevent cross-threading or damage. Check compatibility with your specific small engine model before installation.

Quality Assurance and Warranty

Champion manufactures the Copper Plus Spark Plug 512 to meet industry standards for small engine ignition components. The use of nickel and copper alloy materials ensures durability and consistent performance. While specific warranty details are not provided, Champion products typically adhere to quality control processes to support reliable operation in compatible small engine applications.

BrandChampion
Part Number512
PositionCopper Plus
Center Electrode Diameter (Inch)0.1
Center Electrode Tip MaterialNickel
ClassificationChampion Copper Plus Small Engine
Electrical Terminal TypeNon-Removable Nut
Ground Electrode Core MaterialNickel
Ground Electrode MaterialNickel Copper Alloy
Ground Electrode Quantity1
Hex Size0.813
Hex Size20.650
Hex TypeHex
Installed Height (Inch)2.24
Manufacturer Heat Range12
Plug TypeH12
Pre-Gap Size0.030
Pre-Gap Size0.78
Reach0.438
Resistor TypeNo
Seat TypeFlat
Taper Diameter (Inch)0.31
Thread Diameter0.551
Thread Diameter14.000

This part fits 0 vehicles. Search below:

YearMakeModelPositionNotes

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

14L9168218AL11H12H12J

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.